[{"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"},{"_id":"LifeSc"},{"_id":"ScienComp"}],"publication_identifier":{"eissn":["1089-7550"],"issn":["0021-8979"]},"volume":136,"type":"journal_article","abstract":[{"lang":"eng","text":"Scanning Kelvin probe microscopy (SKPM) is a powerful technique for investigating the electrostatic properties of material surfaces, enabling the imaging of variations in work function, topology, surface charge density, or combinations thereof. Regardless of the underlying signal source, SKPM results in a voltage image, which is spatially distorted due to the finite size of the probe, long-range electrostatic interactions, mechanical and electrical noise, and the finite response time of the electronics. In order to recover the underlying signal, it is necessary to deconvolve the measurement with an appropriate point spread function (PSF) that accounts the aforementioned distortions, but determining this PSF is difficult. Here, we describe how such PSFs can be determined experimentally and show how they can be used to recover the underlying information of interest. We first consider the physical principles that enable SKPM and discuss how these affect the system PSF. We then show how one can experimentally measure PSFs by looking at well-defined features, and that these compare well to simulated PSFs, provided scans are performed extremely slowly and carefully. Next, we work at realistic scan speeds and show that the idealized PSFs fail to capture temporal distortions in the scan direction. While simulating PSFs for these situations would be quite challenging, we show that measuring PSFs with similar scan conditions works well. Our approach clarifies the basic principles and inherent challenges to SKPM measurements and gives practical methods to improve results."}],"author":[{"orcid":"0000-0002-5010-6984","full_name":"Lenton, Isaac C","id":"a550210f-223c-11ec-8182-e2d45e817efb","last_name":"Lenton","first_name":"Isaac C"},{"id":"6313aec0-15b2-11ec-abd3-ed67d16139af","full_name":"Pertl, Felix","orcid":"0000-0003-0463-5794","first_name":"Felix","last_name":"Pertl"},{"last_name":"Shafeek","first_name":"Lubuna B","full_name":"Shafeek, Lubuna B","id":"3CD37A82-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-7180-6050"},{"full_name":"Waitukaitis, Scott R","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2299-3176","last_name":"Waitukaitis","first_name":"Scott R"}],"_id":"17373","acknowledgement":"This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 949120). This research was supported by the Scientific Service Units of the Institute of Science and Technology Austria (ISTA) through resources provided by the Miba Machine Shop, Nanofabrication Facility, Scientific Computing Facility, and Lab Support Facility. The authors wish to thank Dmytro Rak and Juan Carlos Sobarzo for letting us use their equipment. The authors wish to thank the contributions of the whole Waitukaitis Group for useful discussions and feedback.","supplementarymaterial":"yes","day":"28","month":"07","has_accepted_license":"1","researchdata_availability":"upon request","publication_status":"published","department":[{"_id":"ScWa"},{"_id":"NanoFab"}],"dataavailabilitystatement":"The data that support the findings of this study are available from the corresponding author upon reasonable request.","issue":"4","file_date_updated":"2024-08-05T08:19:58Z","file":[{"access_level":"open_access","content_type":"application/pdf","date_updated":"2024-08-05T08:19:58Z","file_size":2537502,"date_created":"2024-08-05T08:19:58Z","creator":"dernst","checksum":"6141d05cd68d540a7446dce9490975db","file_id":"17386","success":1,"file_name":"2024_JourApplPhysics_Lenton.pdf","relation":"main_file"}],"oa":1,"article_type":"original","article_number":"045305","scopus_import":"1","fulldoi":"https://doi.org/10.1063/5.0215151","article_processing_charge":"No","publication":"Journal of Applied Physics","isi":1,"corr_author":"1","title":"Beyond the blur: Using experimentally determined point spread functions to improve scanning Kelvin probe imaging","external_id":{"isi":["001281681100003"]},"doi":"10.1063/5.0215151","date_published":"2024-07-28T00:00:00Z","date_created":"2024-08-04T22:01:21Z","oa_version":"Published Version","project":[{"grant_number":"949120","_id":"0aa60e99-070f-11eb-9043-a6de6bdc3afa","call_identifier":"H2020","name":"Tribocharge: a multi-scale approach to an enduring problem in physics"}],"date_updated":"2026-10-21T08:39:25Z","ddc":["530"],"tmp":{"short":"CC BY-NC-ND (4.0)","legal_code_url":"https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode","name":"Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)","image":"/images/cc_by_nc_nd.png"},"language":[{"iso":"eng"}],"publisher":"AIP Publishing","das_tickbox":"1","related_material":{"record":[{"status":"public","relation":"dissertation_contains","id":"22684"}]},"year":"2024","ec_funded":1,"status":"public","quality_controlled":"1","citation":{"mla":"Lenton, Isaac C., et al. “Beyond the Blur: Using Experimentally Determined Point Spread Functions to Improve Scanning Kelvin Probe Imaging.” <i>Journal of Applied Physics</i>, vol. 136, no. 4, 045305, AIP Publishing, 2024, doi:<a href=\"https://doi.org/10.1063/5.0215151\">10.1063/5.0215151</a>.","ieee":"I. C. Lenton, F. Pertl, L. B. Shafeek, and S. R. Waitukaitis, “Beyond the blur: Using experimentally determined point spread functions to improve scanning Kelvin probe imaging,” <i>Journal of Applied Physics</i>, vol. 136, no. 4. AIP Publishing, 2024.","short":"I.C. Lenton, F. Pertl, L.B. Shafeek, S.R. Waitukaitis, Journal of Applied Physics 136 (2024).","chicago":"Lenton, Isaac C, Felix Pertl, Lubuna B Shafeek, and Scott R Waitukaitis. “Beyond the Blur: Using Experimentally Determined Point Spread Functions to Improve Scanning Kelvin Probe Imaging.” <i>Journal of Applied Physics</i>. AIP Publishing, 2024. <a href=\"https://doi.org/10.1063/5.0215151\">https://doi.org/10.1063/5.0215151</a>.","apa":"Lenton, I. C., Pertl, F., Shafeek, L. B., &#38; Waitukaitis, S. R. (2024). Beyond the blur: Using experimentally determined point spread functions to improve scanning Kelvin probe imaging. <i>Journal of Applied Physics</i>. AIP Publishing. <a href=\"https://doi.org/10.1063/5.0215151\">https://doi.org/10.1063/5.0215151</a>","ama":"Lenton IC, Pertl F, Shafeek LB, Waitukaitis SR. Beyond the blur: Using experimentally determined point spread functions to improve scanning Kelvin probe imaging. <i>Journal of Applied Physics</i>. 2024;136(4). doi:<a href=\"https://doi.org/10.1063/5.0215151\">10.1063/5.0215151</a>","ista":"Lenton IC, Pertl F, Shafeek LB, Waitukaitis SR. 2024. Beyond the blur: Using experimentally determined point spread functions to improve scanning Kelvin probe imaging. Journal of Applied Physics. 136(4), 045305."},"intvolume":"       136"},{"article_number":"L032108","article_type":"letter_note","fulldoi":"https://doi.org/10.1103/PhysRevE.109.L032108","scopus_import":"1","publication":"Physical Review E","isi":1,"article_processing_charge":"No","researchdata_availability":"no","day":"29","month":"03","issue":"3","publication_status":"published","department":[{"_id":"ScWa"}],"type":"journal_article","abstract":[{"lang":"eng","text":"The tendency of materials to order in triboelectric series has prompted suggestions that contact electrification might have a single, unified underlying description. However, the possibility of “triboelectric cycles,” i.e., series that loop back onto themselves, is seemingly at odds with such a coherent description. In this work, we propose that if multiple charge carrying species are at play, both triboelectric series and cycles are possible. We show how series arise naturally if only a single charge carrier species is involved and if the driving mechanism is approach toward thermodynamic equilibrium, and simultaneously, that cycles are forbidden under such conditions. Suspecting multiple carriers might relax the situation, we affirm this is the case by explicit construction of a cycle involving two carriers, and then extend this to show how more complex cycles emerge. Our work highlights the importance of series and cycles towards determining the underlying mechanism(s) and carrier(s) in contact electrification."}],"author":[{"id":"4B807D68-AE37-11E9-AC72-31CAE5697425","full_name":"Sobarzo Ponce, Juan Carlos A","first_name":"Juan Carlos A","last_name":"Sobarzo Ponce"},{"first_name":"Scott R","last_name":"Waitukaitis","full_name":"Waitukaitis, Scott R","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2299-3176"}],"_id":"15322","supplementarymaterial":"no","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","volume":109,"publication_identifier":{"eissn":["2470-0053"],"issn":["2470-0045"]},"citation":{"ista":"Sobarzo Ponce JCA, Waitukaitis SR. 2024. Multiple charge carrier species as a possible cause for triboelectric cycles. Physical Review E. 109(3), L032108.","ama":"Sobarzo Ponce JCA, Waitukaitis SR. Multiple charge carrier species as a possible cause for triboelectric cycles. <i>Physical Review E</i>. 2024;109(3). doi:<a href=\"https://doi.org/10.1103/PhysRevE.109.L032108\">10.1103/PhysRevE.109.L032108</a>","apa":"Sobarzo Ponce, J. C. A., &#38; Waitukaitis, S. R. (2024). Multiple charge carrier species as a possible cause for triboelectric cycles. <i>Physical Review E</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevE.109.L032108\">https://doi.org/10.1103/PhysRevE.109.L032108</a>","short":"J.C.A. Sobarzo Ponce, S.R. Waitukaitis, Physical Review E 109 (2024).","chicago":"Sobarzo Ponce, Juan Carlos A, and Scott R Waitukaitis. “Multiple Charge Carrier Species as a Possible Cause for Triboelectric Cycles.” <i>Physical Review E</i>. American Physical Society, 2024. <a href=\"https://doi.org/10.1103/PhysRevE.109.L032108\">https://doi.org/10.1103/PhysRevE.109.L032108</a>.","mla":"Sobarzo Ponce, Juan Carlos A., and Scott R. Waitukaitis. “Multiple Charge Carrier Species as a Possible Cause for Triboelectric Cycles.” <i>Physical Review E</i>, vol. 109, no. 3, L032108, American Physical Society, 2024, doi:<a href=\"https://doi.org/10.1103/PhysRevE.109.L032108\">10.1103/PhysRevE.109.L032108</a>.","ieee":"J. C. A. Sobarzo Ponce and S. R. Waitukaitis, “Multiple charge carrier species as a possible cause for triboelectric cycles,” <i>Physical Review E</i>, vol. 109, no. 3. American Physical Society, 2024."},"intvolume":"       109","year":"2024","quality_controlled":"1","status":"public","das_tickbox":"0","language":[{"iso":"eng"}],"publisher":"American Physical Society","related_material":{"record":[{"status":"public","relation":"dissertation_contains","id":"20203"}]},"external_id":{"isi":["001199745200004"],"pmid":["38632754"]},"corr_author":"1","title":"Multiple charge carrier species as a possible cause for triboelectric cycles","date_published":"2024-03-29T00:00:00Z","doi":"10.1103/PhysRevE.109.L032108","oa_version":"None","date_created":"2024-04-14T22:01:03Z","pmid":1,"date_updated":"2026-10-21T08:38:31Z"},{"month":"03","day":"03","has_accepted_license":"1","publication_status":"published","department":[{"_id":"ScWa"}],"issue":"9","file":[{"success":1,"file_id":"12698","relation":"main_file","file_name":"Main_Preprint.pdf","date_created":"2023-02-28T12:20:27Z","date_updated":"2023-02-28T12:20:27Z","file_size":2301864,"access_level":"open_access","content_type":"application/pdf","creator":"ggrosjea","checksum":"c4f2f6eea0408811f8f4898e15890355"},{"file_name":"Suppl_info.pdf","relation":"main_file","file_id":"12699","success":1,"checksum":"6af6ed6c97a977f923de4162294b43c4","creator":"ggrosjea","date_created":"2023-02-28T12:20:55Z","access_level":"open_access","content_type":"application/pdf","date_updated":"2023-02-28T12:20:55Z","file_size":1138625},{"success":1,"file_id":"12700","relation":"main_file","file_name":"Suppl_vid1.mp4","date_created":"2023-02-28T12:37:54Z","date_updated":"2023-02-28T12:37:54Z","file_size":793449,"access_level":"open_access","content_type":"video/mp4","checksum":"3f20365fb9515bdba3a111d912c8d8b4","creator":"ggrosjea"},{"date_created":"2023-02-28T12:37:54Z","file_size":455925,"date_updated":"2023-02-28T12:37:54Z","content_type":"video/mp4","access_level":"open_access","checksum":"90cecacbe0e2f9dea11f91a4ba20c32e","creator":"ggrosjea","file_id":"12701","success":1,"relation":"main_file","file_name":"Suppl_vid2.mp4"}],"file_date_updated":"2023-02-28T12:37:54Z","oa":1,"article_type":"original","article_number":"098202","fulldoi":"https://doi.org/10.1103/physrevlett.130.098202","main_file_link":[{"url":"https://arxiv.org/abs/2211.02488","open_access":"1"}],"scopus_import":"1","article_processing_charge":"No","publication":"Physical Review Letters","isi":1,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_identifier":{"issn":["0031-9007"],"eissn":["1079-7114"]},"volume":130,"type":"journal_article","abstract":[{"lang":"eng","text":"Models for same-material contact electrification in granular media often rely on a local charge-driving parameter whose spatial variations lead to a stochastic origin for charge exchange. Measuring the charge transfer from individual granular spheres after contacts with substrates of the same material, we find instead a “global” charging behavior, coherent over the sample’s whole surface. Cleaning and baking samples fully resets charging magnitude and direction, which indicates the underlying global parameter is not intrinsic to the material, but acquired from its history. Charging behavior is randomly and irreversibly affected by changes in relative humidity, hinting at a mechanism where adsorbates, in particular, water, are fundamental to the charge-transfer process."}],"arxiv":1,"author":[{"last_name":"Grosjean","first_name":"Galien M","full_name":"Grosjean, Galien M","id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","orcid":"0000-0001-5154-417X"},{"first_name":"Scott R","last_name":"Waitukaitis","orcid":"0000-0002-2299-3176","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","full_name":"Waitukaitis, Scott R"}],"_id":"12697","acknowledgement":"We would like to thank Troy Shinbrot, Victor Lee and Daniele Foresti for helpful discussions. This project has received funding from the European Research Council Grant Agreement No. 949120 and from the the Marie Sk lodowska-Curie Grant Agreement No. 754411 under\r\nthe European Union’s Horizon 2020 research and innovation program.","year":"2023","ec_funded":1,"status":"public","quality_controlled":"1","citation":{"ama":"Grosjean GM, Waitukaitis SR. Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media. <i>Physical Review Letters</i>. 2023;130(9). doi:<a href=\"https://doi.org/10.1103/physrevlett.130.098202\">10.1103/physrevlett.130.098202</a>","apa":"Grosjean, G. M., &#38; Waitukaitis, S. R. (2023). Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevlett.130.098202\">https://doi.org/10.1103/physrevlett.130.098202</a>","chicago":"Grosjean, Galien M, and Scott R Waitukaitis. “Single-Collision Statistics Reveal a Global Mechanism Driven by Sample History for Contact Electrification in Granular Media.” <i>Physical Review Letters</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/physrevlett.130.098202\">https://doi.org/10.1103/physrevlett.130.098202</a>.","short":"G.M. Grosjean, S.R. Waitukaitis, Physical Review Letters 130 (2023).","mla":"Grosjean, Galien M., and Scott R. Waitukaitis. “Single-Collision Statistics Reveal a Global Mechanism Driven by Sample History for Contact Electrification in Granular Media.” <i>Physical Review Letters</i>, vol. 130, no. 9, 098202, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/physrevlett.130.098202\">10.1103/physrevlett.130.098202</a>.","ieee":"G. M. Grosjean and S. R. Waitukaitis, “Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media,” <i>Physical Review Letters</i>, vol. 130, no. 9. American Physical Society, 2023.","ista":"Grosjean GM, Waitukaitis SR. 2023. Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media. Physical Review Letters. 130(9), 098202."},"intvolume":"       130","title":"Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media","corr_author":"1","external_id":{"isi":["000946178200008"],"pmid":["36930925"],"arxiv":["2211.02488"]},"doi":"10.1103/physrevlett.130.098202","date_published":"2023-03-03T00:00:00Z","oa_version":"Preprint","date_created":"2023-02-28T12:14:46Z","project":[{"call_identifier":"H2020","_id":"0aa60e99-070f-11eb-9043-a6de6bdc3afa","name":"Tribocharge: a multi-scale approach to an enduring problem in physics","grant_number":"949120"},{"grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships","_id":"260C2330-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"}],"keyword":["General Physics","Electrostatics","Triboelectricity","Soft Matter","Acoustic Levitation","Granular Materials"],"pmid":1,"date_updated":"2025-04-23T08:51:13Z","ddc":["530","537"],"tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"language":[{"iso":"eng"}],"publisher":"American Physical Society","related_material":{"record":[{"status":"public","id":"8101","relation":"research_paper"}]}},{"issue":"3","department":[{"_id":"ScWa"}],"publication_status":"published","has_accepted_license":"1","month":"03","day":"01","scopus_import":"1","fulldoi":"https://doi.org/10.1103/PhysRevE.107.034901","isi":1,"publication":"Physical Review E","article_processing_charge":"No","oa":1,"file_date_updated":"2023-11-27T09:51:48Z","file":[{"success":1,"file_id":"14612","file_name":"PhysRevE.107.034901 (1).pdf","relation":"main_file","access_level":"open_access","content_type":"application/pdf","file_size":1428631,"date_updated":"2023-11-27T09:51:48Z","date_created":"2023-11-27T09:51:48Z","checksum":"48f5dfe4e5f1c46c3c86805cd8f84bea","creator":"swaituka"}],"article_number":"034901","article_type":"original","acknowledged_ssus":[{"_id":"M-Shop"}],"volume":107,"publication_identifier":{"issn":["2470-0045"],"eissn":["2470-0053"]},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","author":[{"full_name":"Mujica, Nicolás","first_name":"Nicolás","last_name":"Mujica"},{"full_name":"Waitukaitis, Scott R","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2299-3176","last_name":"Waitukaitis","first_name":"Scott R"}],"_id":"12789","acknowledgement":"This research was supported by Grants QUIMAL 160001 and Fondecyt 1221597. This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (Grant Agreement No. 949120). This research was supported by the Scientific Service Units of The Institute of Science and Technology Austria (ISTA) through resources provided by the Miba Machine Shop. We thank the machine shop technical assistance of Ricardo Silva and Andrés Espinosa at Departamento de Física, Universidad de Chile.","type":"journal_article","abstract":[{"lang":"eng","text":"Experiments have shown that charge distributions of granular materials are non-Gaussian, with broad tails that indicate many particles with high charge. This observation has consequences for the behavior of granular materials in many settings, and may bear relevance to the underlying charge transfer mechanism. However, there is the unaddressed possibility that broad tails arise due to experimental uncertainties, as determining the shapes of tails is nontrivial. Here we show that measurement uncertainties can indeed account for most of the tail broadening previously observed. The clue that reveals this is that distributions are sensitive to the electric field at which they are measured; ones measured at low (high) fields have larger (smaller) tails. Accounting for sources of uncertainty, we reproduce this broadening in silico. Finally, we use our results to back out the true charge distribution without broadening, which we find is still non-Guassian, though with substantially different behavior at the tails and indicating significantly fewer highly charged particles. These results have implications in many natural settings where electrostatic interactions, especially among highly charged particles, strongly affect granular behavior."}],"quality_controlled":"1","status":"public","ec_funded":1,"year":"2023","intvolume":"       107","citation":{"ista":"Mujica N, Waitukaitis SR. 2023. Accurate determination of the shapes of granular charge distributions. Physical Review E. 107(3), 034901.","ama":"Mujica N, Waitukaitis SR. Accurate determination of the shapes of granular charge distributions. <i>Physical Review E</i>. 2023;107(3). doi:<a href=\"https://doi.org/10.1103/PhysRevE.107.034901\">10.1103/PhysRevE.107.034901</a>","apa":"Mujica, N., &#38; Waitukaitis, S. R. (2023). Accurate determination of the shapes of granular charge distributions. <i>Physical Review E</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevE.107.034901\">https://doi.org/10.1103/PhysRevE.107.034901</a>","short":"N. Mujica, S.R. Waitukaitis, Physical Review E 107 (2023).","chicago":"Mujica, Nicolás, and Scott R Waitukaitis. “Accurate Determination of the Shapes of Granular Charge Distributions.” <i>Physical Review E</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/PhysRevE.107.034901\">https://doi.org/10.1103/PhysRevE.107.034901</a>.","ieee":"N. Mujica and S. R. Waitukaitis, “Accurate determination of the shapes of granular charge distributions,” <i>Physical Review E</i>, vol. 107, no. 3. American Physical Society, 2023.","mla":"Mujica, Nicolás, and Scott R. Waitukaitis. “Accurate Determination of the Shapes of Granular Charge Distributions.” <i>Physical Review E</i>, vol. 107, no. 3, 034901, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/PhysRevE.107.034901\">10.1103/PhysRevE.107.034901</a>."},"project":[{"grant_number":"949120","name":"Tribocharge: a multi-scale approach to an enduring problem in physics","call_identifier":"H2020","_id":"0aa60e99-070f-11eb-9043-a6de6bdc3afa"}],"oa_version":"Published Version","date_created":"2023-04-02T22:01:10Z","ddc":["530"],"pmid":1,"date_updated":"2025-04-14T07:54:10Z","title":"Accurate determination of the shapes of granular charge distributions","external_id":{"pmid":["37072968"],"isi":["000992142700001"]},"corr_author":"1","date_published":"2023-03-01T00:00:00Z","doi":"10.1103/PhysRevE.107.034901","language":[{"iso":"eng"}],"publisher":"American Physical Society"},{"publisher":"American Physical Society","language":[{"iso":"eng"}],"project":[{"grant_number":"949120","name":"Tribocharge: a multi-scale approach to an enduring problem in physics","call_identifier":"H2020","_id":"0aa60e99-070f-11eb-9043-a6de6bdc3afa"},{"grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","_id":"260C2330-B435-11E9-9278-68D0E5697425"}],"keyword":["Physics and Astronomy (miscellaneous)","General Materials Science"],"oa_version":"Submitted Version","date_created":"2023-07-07T12:48:01Z","ddc":["537"],"date_updated":"2025-04-14T07:43:55Z","external_id":{"arxiv":["2304.12861"],"isi":["001019565900002"]},"title":"Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts","corr_author":"1","date_published":"2023-06-13T00:00:00Z","doi":"10.1103/physrevmaterials.7.065601","intvolume":"         7","citation":{"ista":"Grosjean GM, Waitukaitis SR. 2023. Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts. Physical Review Materials. 7(6), 065601.","mla":"Grosjean, Galien M., and Scott R. Waitukaitis. “Asymmetries in Triboelectric Charging: Generalizing Mosaic Models to Different-Material Samples and Sliding Contacts.” <i>Physical Review Materials</i>, vol. 7, no. 6, 065601, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/physrevmaterials.7.065601\">10.1103/physrevmaterials.7.065601</a>.","ieee":"G. M. Grosjean and S. R. Waitukaitis, “Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts,” <i>Physical Review Materials</i>, vol. 7, no. 6. American Physical Society, 2023.","chicago":"Grosjean, Galien M, and Scott R Waitukaitis. “Asymmetries in Triboelectric Charging: Generalizing Mosaic Models to Different-Material Samples and Sliding Contacts.” <i>Physical Review Materials</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/physrevmaterials.7.065601\">https://doi.org/10.1103/physrevmaterials.7.065601</a>.","short":"G.M. Grosjean, S.R. Waitukaitis, Physical Review Materials 7 (2023).","apa":"Grosjean, G. M., &#38; Waitukaitis, S. R. (2023). Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts. <i>Physical Review Materials</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevmaterials.7.065601\">https://doi.org/10.1103/physrevmaterials.7.065601</a>","ama":"Grosjean GM, Waitukaitis SR. Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts. <i>Physical Review Materials</i>. 2023;7(6). doi:<a href=\"https://doi.org/10.1103/physrevmaterials.7.065601\">10.1103/physrevmaterials.7.065601</a>"},"quality_controlled":"1","status":"public","ec_funded":1,"year":"2023","_id":"13197","acknowledgement":"This project has received funding from the European Research Council Grant Agreement No. 949120 and from\r\nthe European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant\r\nAgreement No. 754411. ","author":[{"orcid":"0000-0001-5154-417X","full_name":"Grosjean, Galien M","id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","first_name":"Galien M","last_name":"Grosjean"},{"last_name":"Waitukaitis","first_name":"Scott R","orcid":"0000-0002-2299-3176","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","full_name":"Waitukaitis, Scott R"}],"arxiv":1,"type":"journal_article","abstract":[{"text":"Nominally identical materials exchange net electric charge during contact through a mechanism that is still debated. ‘Mosaic models’, in which surfaces are presumed to consist of a random patchwork of microscopic donor/acceptor sites, offer an appealing explanation for this phenomenon. However, recent experiments have shown that global differences persist even between same-material samples, which the standard mosaic framework does not account for. Here, we expand the mosaic framework by incorporating global differences in the densities of donor/acceptor sites. We develop\r\nan analytical model, backed by numerical simulations, that smoothly connects the global and deterministic charge transfer of different materials to the local and stochastic mosaic picture normally associated with identical materials. Going further, we extend our model to explain the effect of contact asymmetries during sliding, providing a plausible explanation for reversal of charging sign that has been observed experimentally.","lang":"eng"}],"volume":7,"publication_identifier":{"issn":["2475-9953"]},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","scopus_import":"1","fulldoi":"https://doi.org/10.1103/physrevmaterials.7.065601","publication":"Physical Review Materials","isi":1,"article_processing_charge":"No","oa":1,"file_date_updated":"2023-07-07T12:49:51Z","file":[{"creator":"ggrosjea","checksum":"75584730d9cdd50eeccb4c52c509776d","file_size":1127040,"date_updated":"2023-07-07T12:49:51Z","content_type":"application/pdf","access_level":"open_access","date_created":"2023-07-07T12:49:51Z","relation":"main_file","file_name":"Mosaic_asymmetries.pdf","file_id":"13198","success":1}],"article_number":"065601","article_type":"original","issue":"6","publication_status":"published","department":[{"_id":"ScWa"}],"has_accepted_license":"1","month":"06","day":"13"},{"author":[{"full_name":"Binysh, Jack","first_name":"Jack","last_name":"Binysh"},{"last_name":"Chakraborty","first_name":"Indrajit","full_name":"Chakraborty, Indrajit"},{"last_name":"Chubynsky","first_name":"Mykyta","full_name":"Chubynsky, Mykyta"},{"last_name":"Diaz Melian","first_name":"Vicente L","full_name":"Diaz Melian, Vicente L","id":"b6798902-eea0-11ea-9cbc-a8e14286c631"},{"last_name":"Waitukaitis","first_name":"Scott R","full_name":"Waitukaitis, Scott R","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2299-3176"},{"full_name":"Sprittles, James","first_name":"James","last_name":"Sprittles"},{"full_name":"Souslov, Anton","last_name":"Souslov","first_name":"Anton"}],"_id":"14523","related_material":{"record":[{"status":"public","relation":"used_in_publication","id":"14514"}]},"publisher":"Zenodo","abstract":[{"text":"see Readme file","lang":"eng"}],"type":"research_data_reference","ddc":["530"],"date_updated":"2025-09-09T13:19:07Z","date_created":"2023-11-13T09:12:11Z","oa_version":"Published Version","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_published":"2023-09-08T00:00:00Z","doi":"10.5281/ZENODO.8329143","title":"SouslovLab/PRL2023-ModellingLeidenfrostLevitationofSoftElasticSolids: v1.0.1","article_processing_charge":"No","fulldoi":"https://doi.org/10.5281/ZENODO.8329143","main_file_link":[{"url":"https://doi.org/10.5281/ZENODO.8329143","open_access":"1"}],"citation":{"ieee":"J. Binysh <i>et al.</i>, “SouslovLab/PRL2023-ModellingLeidenfrostLevitationofSoftElasticSolids: v1.0.1.” Zenodo, 2023.","mla":"Binysh, Jack, et al. <i>SouslovLab/PRL2023-ModellingLeidenfrostLevitationofSoftElasticSolids: V1.0.1</i>. Zenodo, 2023, doi:<a href=\"https://doi.org/10.5281/ZENODO.8329143\">10.5281/ZENODO.8329143</a>.","short":"J. Binysh, I. Chakraborty, M. Chubynsky, V.L. Diaz Melian, S.R. Waitukaitis, J. Sprittles, A. Souslov, (2023).","chicago":"Binysh, Jack, Indrajit Chakraborty, Mykyta Chubynsky, Vicente L Diaz Melian, Scott R Waitukaitis, James Sprittles, and Anton Souslov. “SouslovLab/PRL2023-ModellingLeidenfrostLevitationofSoftElasticSolids: V1.0.1.” Zenodo, 2023. <a href=\"https://doi.org/10.5281/ZENODO.8329143\">https://doi.org/10.5281/ZENODO.8329143</a>.","apa":"Binysh, J., Chakraborty, I., Chubynsky, M., Diaz Melian, V. L., Waitukaitis, S. R., Sprittles, J., &#38; Souslov, A. (2023). SouslovLab/PRL2023-ModellingLeidenfrostLevitationofSoftElasticSolids: v1.0.1. Zenodo. <a href=\"https://doi.org/10.5281/ZENODO.8329143\">https://doi.org/10.5281/ZENODO.8329143</a>","ama":"Binysh J, Chakraborty I, Chubynsky M, et al. SouslovLab/PRL2023-ModellingLeidenfrostLevitationofSoftElasticSolids: v1.0.1. 2023. doi:<a href=\"https://doi.org/10.5281/ZENODO.8329143\">10.5281/ZENODO.8329143</a>","ista":"Binysh J, Chakraborty I, Chubynsky M, Diaz Melian VL, Waitukaitis SR, Sprittles J, Souslov A. 2023. SouslovLab/PRL2023-ModellingLeidenfrostLevitationofSoftElasticSolids: v1.0.1, Zenodo, <a href=\"https://doi.org/10.5281/ZENODO.8329143\">10.5281/ZENODO.8329143</a>."},"oa":1,"status":"public","department":[{"_id":"ScWa"}],"year":"2023","day":"08","month":"09"},{"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","_id":"14864","acknowledgement":"This project has received funding from the European Research Council (ERC) under the European Union’s Starting Grant (No. 949120).","author":[{"first_name":"Andrea","last_name":"Stöllner","orcid":"0000-0002-0464-8440","id":"4bdcf7f6-eb97-11eb-a6c2-9981bbdc3bed","full_name":"Stöllner, Andrea"},{"last_name":"Lenton","first_name":"Isaac C","orcid":"0000-0002-5010-6984","full_name":"Lenton, Isaac C","id":"a550210f-223c-11ec-8182-e2d45e817efb"},{"orcid":"0000-0001-5836-5350","id":"f978ccb0-3f7f-11eb-b193-b0e2bd13182b","full_name":"Muller, Caroline J","first_name":"Caroline J","last_name":"Muller"},{"first_name":"Scott R","last_name":"Waitukaitis","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","full_name":"Waitukaitis, Scott R","orcid":"0000-0002-2299-3176"}],"type":"conference_abstract","department":[{"_id":"CaMu"},{"_id":"ScWa"}],"publication_status":"published","day":"23","month":"04","has_accepted_license":"1","article_processing_charge":"No","publication":"EGU General Assembly 2023","fulldoi":"https://doi.org/10.5194/egusphere-egu23-6166","article_number":"6166","file":[{"creator":"dernst","checksum":"8d6ddbb359e584b156f991f00196d86b","file_size":419736,"date_updated":"2024-01-23T13:00:26Z","content_type":"application/pdf","access_level":"open_access","date_created":"2024-01-23T13:00:26Z","relation":"main_file","file_name":"2023_EGU_Stoellner.pdf","success":1,"file_id":"14880"}],"file_date_updated":"2024-01-23T13:00:26Z","oa":1,"date_updated":"2025-04-14T07:54:10Z","ddc":["530"],"date_created":"2024-01-22T12:09:07Z","oa_version":"Published Version","project":[{"_id":"0aa60e99-070f-11eb-9043-a6de6bdc3afa","call_identifier":"H2020","name":"Tribocharge: a multi-scale approach to an enduring problem in physics","grant_number":"949120"}],"doi":"10.5194/egusphere-egu23-6166","date_published":"2023-04-23T00:00:00Z","title":"Measuring spontaneous charging of single aerosol particles","corr_author":"1","conference":{"start_date":"2023-04-23","location":"Vienna, Austria & Virtual","name":"EGU General Assembly","end_date":"2023-04-28"},"publisher":"European Geosciences Union","language":[{"iso":"eng"}],"tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"ec_funded":1,"status":"public","year":"2023","citation":{"short":"A. Stöllner, I.C. Lenton, C.J. Muller, S.R. Waitukaitis, in:, EGU General Assembly 2023, European Geosciences Union, 2023.","chicago":"Stöllner, Andrea, Isaac C Lenton, Caroline J Muller, and Scott R Waitukaitis. “Measuring Spontaneous Charging of Single Aerosol Particles.” In <i>EGU General Assembly 2023</i>. European Geosciences Union, 2023. <a href=\"https://doi.org/10.5194/egusphere-egu23-6166\">https://doi.org/10.5194/egusphere-egu23-6166</a>.","mla":"Stöllner, Andrea, et al. “Measuring Spontaneous Charging of Single Aerosol Particles.” <i>EGU General Assembly 2023</i>, 6166, European Geosciences Union, 2023, doi:<a href=\"https://doi.org/10.5194/egusphere-egu23-6166\">10.5194/egusphere-egu23-6166</a>.","ieee":"A. Stöllner, I. C. Lenton, C. J. Muller, and S. R. Waitukaitis, “Measuring spontaneous charging of single aerosol particles,” in <i>EGU General Assembly 2023</i>, Vienna, Austria &#38; Virtual, 2023.","ama":"Stöllner A, Lenton IC, Muller CJ, Waitukaitis SR. Measuring spontaneous charging of single aerosol particles. In: <i>EGU General Assembly 2023</i>. European Geosciences Union; 2023. doi:<a href=\"https://doi.org/10.5194/egusphere-egu23-6166\">10.5194/egusphere-egu23-6166</a>","apa":"Stöllner, A., Lenton, I. C., Muller, C. J., &#38; Waitukaitis, S. R. (2023). Measuring spontaneous charging of single aerosol particles. In <i>EGU General Assembly 2023</i>. Vienna, Austria &#38; Virtual: European Geosciences Union. <a href=\"https://doi.org/10.5194/egusphere-egu23-6166\">https://doi.org/10.5194/egusphere-egu23-6166</a>","ista":"Stöllner A, Lenton IC, Muller CJ, Waitukaitis SR. 2023. Measuring spontaneous charging of single aerosol particles. EGU General Assembly 2023. EGU General Assembly, 6166."}},{"title":"Modeling Leidenfrost levitation of soft elastic solids","external_id":{"pmid":["37925690"],"isi":["001164388300007"]},"date_published":"2023-10-20T00:00:00Z","doi":"10.1103/PhysRevLett.131.168201","oa_version":"Published Version","date_created":"2023-11-12T23:00:55Z","ddc":["530"],"date_updated":"2026-10-02T08:44:47Z","pmid":1,"tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"language":[{"iso":"eng"}],"publisher":"American Physical Society","related_material":{"record":[{"id":"14523","relation":"research_data","status":"public"},{"status":"public","relation":"dissertation_contains","id":"23005"}]},"year":"2023","quality_controlled":"1","status":"public","citation":{"ista":"Binysh J, Chakraborty I, Chubynsky MV, Diaz Melian VL, Waitukaitis SR, Sprittles JE, Souslov A. 2023. Modeling Leidenfrost levitation of soft elastic solids. Physical Review Letters. 131(16), 168201.","apa":"Binysh, J., Chakraborty, I., Chubynsky, M. V., Diaz Melian, V. L., Waitukaitis, S. R., Sprittles, J. E., &#38; Souslov, A. (2023). Modeling Leidenfrost levitation of soft elastic solids. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevLett.131.168201\">https://doi.org/10.1103/PhysRevLett.131.168201</a>","ama":"Binysh J, Chakraborty I, Chubynsky MV, et al. Modeling Leidenfrost levitation of soft elastic solids. <i>Physical Review Letters</i>. 2023;131(16). doi:<a href=\"https://doi.org/10.1103/PhysRevLett.131.168201\">10.1103/PhysRevLett.131.168201</a>","ieee":"J. Binysh <i>et al.</i>, “Modeling Leidenfrost levitation of soft elastic solids,” <i>Physical Review Letters</i>, vol. 131, no. 16. American Physical Society, 2023.","mla":"Binysh, Jack, et al. “Modeling Leidenfrost Levitation of Soft Elastic Solids.” <i>Physical Review Letters</i>, vol. 131, no. 16, 168201, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/PhysRevLett.131.168201\">10.1103/PhysRevLett.131.168201</a>.","chicago":"Binysh, Jack, Indrajit Chakraborty, Mykyta V. Chubynsky, Vicente L Diaz Melian, Scott R Waitukaitis, James E. Sprittles, and Anton Souslov. “Modeling Leidenfrost Levitation of Soft Elastic Solids.” <i>Physical Review Letters</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/PhysRevLett.131.168201\">https://doi.org/10.1103/PhysRevLett.131.168201</a>.","short":"J. Binysh, I. Chakraborty, M.V. Chubynsky, V.L. Diaz Melian, S.R. Waitukaitis, J.E. Sprittles, A. Souslov, Physical Review Letters 131 (2023)."},"intvolume":"       131","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","volume":131,"publication_identifier":{"eissn":["1079-7114"],"issn":["0031-9007"]},"type":"journal_article","abstract":[{"text":"The elastic Leidenfrost effect occurs when a vaporizable soft solid is lowered onto a hot surface. Evaporative flow couples to elastic deformation, giving spontaneous bouncing or steady-state floating. The effect embodies an unexplored interplay between thermodynamics, elasticity, and lubrication: despite being observed, its basic theoretical description remains a challenge. Here, we provide a theory of elastic Leidenfrost floating. As weight increases, a rigid solid sits closer to the hot surface. By contrast, we discover an elasticity-dominated regime where the heavier the solid, the higher it floats. This geometry-governed behavior is reminiscent of the dynamics of large liquid Leidenfrost drops. We show that this elastic regime is characterized by Hertzian behavior of the solid’s underbelly and derive how the float height scales with materials parameters. Introducing a dimensionless elastic Leidenfrost number, we capture the crossover between rigid and Hertzian behavior. Our results provide theoretical underpinning for recent experiments, and point to the design of novel soft machines.","lang":"eng"}],"author":[{"first_name":"Jack","last_name":"Binysh","full_name":"Binysh, Jack"},{"full_name":"Chakraborty, Indrajit","last_name":"Chakraborty","first_name":"Indrajit"},{"first_name":"Mykyta V.","last_name":"Chubynsky","full_name":"Chubynsky, Mykyta V."},{"first_name":"Vicente L","last_name":"Diaz Melian","full_name":"Diaz Melian, Vicente L","id":"b6798902-eea0-11ea-9cbc-a8e14286c631"},{"first_name":"Scott R","last_name":"Waitukaitis","full_name":"Waitukaitis, Scott R","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2299-3176"},{"full_name":"Sprittles, James E.","first_name":"James E.","last_name":"Sprittles"},{"full_name":"Souslov, Anton","last_name":"Souslov","first_name":"Anton"}],"_id":"14514","acknowledgement":"We are grateful to Dominic Vella, Jens Eggers, John Kolinski, Joshua Dijksman, and Daniel Bonn for insightful discussions. J. B. and A. S. acknowledge the support of the Engineering and Physical Sciences Research Council (EPSRC) through New Investigator Award No. EP/\r\nT000961/1. A. S. acknowledges the support of Royal Society under Grant No. RGS/R2/202135. J. E. S. acknowledges EPSRC Grants No. EP/N016602/1, EP/S022848/1, EP/S029966/1, and EP/P031684/1.","has_accepted_license":"1","day":"20","month":"10","issue":"16","department":[{"_id":"ScWa"}],"publication_status":"published","oa":1,"file_date_updated":"2023-11-13T09:12:58Z","file":[{"file_name":"2023_PhysRevLetters_Binysh.pdf","relation":"main_file","file_id":"14524","success":1,"checksum":"1a419e25b762aadffbcc8eb2e609bd97","creator":"dernst","access_level":"open_access","content_type":"application/pdf","date_updated":"2023-11-13T09:12:58Z","file_size":724098,"date_created":"2023-11-13T09:12:58Z"}],"article_number":"168201","article_type":"original","scopus_import":"1","fulldoi":"https://doi.org/10.1103/PhysRevLett.131.168201","publication":"Physical Review Letters","isi":1,"article_processing_charge":"Yes (in subscription journal)"},{"DOAJ_listed":"1","intvolume":"         3","citation":{"ista":"Clavaud C. 2022. Shear thickening in dense suspensions: an experimental study. Science Talks. 3, 100038.","ama":"Clavaud C. Shear thickening in dense suspensions: an experimental study. <i>Science Talks</i>. 2022;3. doi:<a href=\"https://doi.org/10.1016/j.sctalk.2022.100038\">10.1016/j.sctalk.2022.100038</a>","apa":"Clavaud, C. (2022). Shear thickening in dense suspensions: an experimental study. <i>Science Talks</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.sctalk.2022.100038\">https://doi.org/10.1016/j.sctalk.2022.100038</a>","chicago":"Clavaud, Cécile. “Shear Thickening in Dense Suspensions: An Experimental Study.” <i>Science Talks</i>. Elsevier, 2022. <a href=\"https://doi.org/10.1016/j.sctalk.2022.100038\">https://doi.org/10.1016/j.sctalk.2022.100038</a>.","short":"C. Clavaud, Science Talks 3 (2022).","mla":"Clavaud, Cécile. “Shear Thickening in Dense Suspensions: An Experimental Study.” <i>Science Talks</i>, vol. 3, 100038, Elsevier, 2022, doi:<a href=\"https://doi.org/10.1016/j.sctalk.2022.100038\">10.1016/j.sctalk.2022.100038</a>.","ieee":"C. Clavaud, “Shear thickening in dense suspensions: an experimental study,” <i>Science Talks</i>, vol. 3. Elsevier, 2022."},"quality_controlled":"1","status":"public","OA_type":"gold","year":"2022","OA_place":"publisher","language":[{"iso":"eng"}],"publisher":"Elsevier","tmp":{"short":"CC BY-NC-ND (4.0)","legal_code_url":"https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode","name":"Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)","image":"/images/cc_by_nc_nd.png"},"date_updated":"2024-12-11T09:24:57Z","ddc":["530"],"date_created":"2024-12-01T23:01:55Z","oa_version":"Published Version","doi":"10.1016/j.sctalk.2022.100038","date_published":"2022-08-01T00:00:00Z","corr_author":"1","title":"Shear thickening in dense suspensions: an experimental study","article_processing_charge":"No","publication":"Science Talks","scopus_import":"1","fulldoi":"https://doi.org/10.1016/j.sctalk.2022.100038","article_type":"original","article_number":"100038","file":[{"creator":"dernst","checksum":"379a5f0b2684cd5393a23be374591484","date_updated":"2024-12-03T08:41:48Z","file_size":1128564,"content_type":"application/pdf","access_level":"open_access","date_created":"2024-12-03T08:41:48Z","relation":"main_file","file_name":"2022_ScienceTalks_Clavaud.pdf","file_id":"18607","success":1},{"file_name":"2024_ScienceTalk_Clavaud_Video.mp4","relation":"main_file","success":1,"file_id":"18646","creator":"dernst","checksum":"666c0bd9af8432437554d0c75c540809","access_level":"open_access","content_type":"video/mp4","date_updated":"2024-12-11T09:22:13Z","file_size":93265727,"date_created":"2024-12-11T09:22:13Z"},{"relation":"supplementary_material","file_name":"2024_ScienceTalk__Clavaud_QA.mp4","file_id":"18647","creator":"dernst","checksum":"8fd0d6224d7a0125fcf7d9ca0d80d700","file_size":58282147,"date_updated":"2024-12-11T09:22:19Z","access_level":"open_access","content_type":"video/mp4","date_created":"2024-12-11T09:22:19Z"}],"file_date_updated":"2024-12-11T09:22:19Z","oa":1,"department":[{"_id":"ScWa"}],"publication_status":"published","day":"01","month":"08","has_accepted_license":"1","acknowledgement":"This talk presents parts of my PhD work, conducted at IUSTI in Marseille under the supervision of Yoël Forterre and Bloen Metzger. It aslo benefited from contributions from Antoine Bérut, and some of the data was acquired by Pauline Dame as part of a summer internship.\r\nThis work was supported by the European Research Council (ERC) under the European Union Horizon 2020 Research and Innovation program (ERC Grant 647384) and by the Labex MEC (ANR-10-LABX-0092) under the 647384) and by the A*MIDEX project (ANR-11-IDEX-0001-02) funded by the French government program Investissements d'Avenir, and by ANR ScienceFriction (No. ANR-18-CE30-0024).","_id":"18606","author":[{"id":"5f654c5d-04a1-11eb-ab36-ba9ffec58bd8","full_name":"Clavaud, Cécile","orcid":"0000-0002-1843-3803","last_name":"Clavaud","first_name":"Cécile"}],"abstract":[{"lang":"eng","text":"Shear thickening is an intriguing rheological behaviour which consists in a brutal increase in the viscosity above a critical shear rate. It is famously encountered in suspensions of corn starch in water. Despite having been discovered in the early 1930's, its underlying mechanisms remained a mystery for a long time. In 2013–14, numerical and theoretical works [[1], [2], [3]] put forward a frictional transition scenario to explain this phenomenon.\r\nIn this talk, I will present experimental work investigating this frictional transition scenario. In order to test the ideas of this model, one has to go further than standard rheological techniques, since they do not provide access to the frictional state of the measured suspension. I will thus focus on the techniques that we developed in order to evidence the frictional transition and link it to the presence of a shear-thickening behaviour."}],"type":"journal_article","publication_identifier":{"eissn":["2772-5693"]},"volume":3,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87"},{"month":"01","day":"24","issue":"1","publication_status":"published","department":[{"_id":"ScWa"}],"oa":1,"article_number":"39","article_type":"original","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2110.15311"}],"fulldoi":"https://doi.org/10.1007/s10035-021-01200-8","scopus_import":"1","publication":"Granular Matter","isi":1,"article_processing_charge":"No","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","volume":24,"publication_identifier":{"issn":["1434-5021"],"eissn":["1434-7636"]},"type":"journal_article","abstract":[{"lang":"eng","text":"When a cylindrical object penetrates granular matter near a vertical boundary, it experiences two effects: its center of mass moves horizontally away from the wall, and it rotates around its symmetry axis. Here we show experimentally that, if two identical intruders instead of one are released side-by-side near the wall, both effects are also detected. However, unexpected phenomena appear due to a cooperative dynamics between the intruders. The net horizontal distance traveled by the common center of mass of the twin intruders is much larger than that traveled by one intruder released at the same initial distance from the wall, and the rotation is also larger. The experimental results are well described by the Discrete Element Method (DEM), which reveals that, as the number of intruders horizontally released side-by-side increases, the total energy dissipation per intruder decreases. Finally, DEM simulations demonstrate that the horizontal repulsion is substantially enhanced if groups of intruders are released forming a column near the wall."}],"acknowledgement":"We acknowledge the University of Havana’s institutional project “Granular media: creating tools for the prevention of catastrophes”. The Institute “Pedro Kourí” is thanked for allowing us using their computing cluster. E. Altshuler found inspiration in the late M. Álvarez-Ponte.","_id":"10733","author":[{"last_name":"Espinosa","first_name":"M.","full_name":"Espinosa, M."},{"full_name":"Diaz Melian, Vicente L","id":"b6798902-eea0-11ea-9cbc-a8e14286c631","last_name":"Diaz Melian","first_name":"Vicente L"},{"first_name":"A.","last_name":"Serrano-Muñoz","full_name":"Serrano-Muñoz, A."},{"first_name":"E.","last_name":"Altshuler","full_name":"Altshuler, E."}],"arxiv":1,"year":"2022","status":"public","quality_controlled":"1","citation":{"ista":"Espinosa M, Diaz Melian VL, Serrano-Muñoz A, Altshuler E. 2022. Intruders cooperatively interact with a wall into granular matter. Granular Matter. 24(1), 39.","mla":"Espinosa, M., et al. “Intruders Cooperatively Interact with a Wall into Granular Matter.” <i>Granular Matter</i>, vol. 24, no. 1, 39, Springer Nature, 2022, doi:<a href=\"https://doi.org/10.1007/s10035-021-01200-8\">10.1007/s10035-021-01200-8</a>.","ieee":"M. Espinosa, V. L. Diaz Melian, A. Serrano-Muñoz, and E. Altshuler, “Intruders cooperatively interact with a wall into granular matter,” <i>Granular Matter</i>, vol. 24, no. 1. Springer Nature, 2022.","chicago":"Espinosa, M., Vicente L Diaz Melian, A. Serrano-Muñoz, and E. Altshuler. “Intruders Cooperatively Interact with a Wall into Granular Matter.” <i>Granular Matter</i>. Springer Nature, 2022. <a href=\"https://doi.org/10.1007/s10035-021-01200-8\">https://doi.org/10.1007/s10035-021-01200-8</a>.","short":"M. Espinosa, V.L. Diaz Melian, A. Serrano-Muñoz, E. Altshuler, Granular Matter 24 (2022).","apa":"Espinosa, M., Diaz Melian, V. L., Serrano-Muñoz, A., &#38; Altshuler, E. (2022). Intruders cooperatively interact with a wall into granular matter. <i>Granular Matter</i>. Springer Nature. <a href=\"https://doi.org/10.1007/s10035-021-01200-8\">https://doi.org/10.1007/s10035-021-01200-8</a>","ama":"Espinosa M, Diaz Melian VL, Serrano-Muñoz A, Altshuler E. Intruders cooperatively interact with a wall into granular matter. <i>Granular Matter</i>. 2022;24(1). doi:<a href=\"https://doi.org/10.1007/s10035-021-01200-8\">10.1007/s10035-021-01200-8</a>"},"intvolume":"        24","title":"Intruders cooperatively interact with a wall into granular matter","external_id":{"isi":["000746623000001"],"arxiv":["2110.15311"]},"date_published":"2022-01-24T00:00:00Z","doi":"10.1007/s10035-021-01200-8","keyword":["granular matter","boundary effects","intruder penetration","sedimentation"],"oa_version":"Preprint","date_created":"2022-02-06T23:01:30Z","date_updated":"2023-08-02T14:10:13Z","language":[{"iso":"eng"}],"publisher":"Springer Nature"},{"ec_funded":1,"quality_controlled":"1","status":"public","year":"2022","intvolume":"         6","citation":{"ista":"Pertl F, Sobarzo Ponce JCA, Shafeek LB, Cramer T, Waitukaitis SR. 2022. Quantifying nanoscale charge density features of contact-charged surfaces with an FEM/KPFM-hybrid approach. Physical Review Materials. 6(12), 125605.","chicago":"Pertl, Felix, Juan Carlos A Sobarzo Ponce, Lubuna B Shafeek, Tobias Cramer, and Scott R Waitukaitis. “Quantifying Nanoscale Charge Density Features of Contact-Charged Surfaces with an FEM/KPFM-Hybrid Approach.” <i>Physical Review Materials</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/PhysRevMaterials.6.125605\">https://doi.org/10.1103/PhysRevMaterials.6.125605</a>.","short":"F. Pertl, J.C.A. Sobarzo Ponce, L.B. Shafeek, T. Cramer, S.R. Waitukaitis, Physical Review Materials 6 (2022).","ieee":"F. Pertl, J. C. A. Sobarzo Ponce, L. B. Shafeek, T. Cramer, and S. R. Waitukaitis, “Quantifying nanoscale charge density features of contact-charged surfaces with an FEM/KPFM-hybrid approach,” <i>Physical Review Materials</i>, vol. 6, no. 12. American Physical Society, 2022.","mla":"Pertl, Felix, et al. “Quantifying Nanoscale Charge Density Features of Contact-Charged Surfaces with an FEM/KPFM-Hybrid Approach.” <i>Physical Review Materials</i>, vol. 6, no. 12, 125605, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/PhysRevMaterials.6.125605\">10.1103/PhysRevMaterials.6.125605</a>.","ama":"Pertl F, Sobarzo Ponce JCA, Shafeek LB, Cramer T, Waitukaitis SR. Quantifying nanoscale charge density features of contact-charged surfaces with an FEM/KPFM-hybrid approach. <i>Physical Review Materials</i>. 2022;6(12). doi:<a href=\"https://doi.org/10.1103/PhysRevMaterials.6.125605\">10.1103/PhysRevMaterials.6.125605</a>","apa":"Pertl, F., Sobarzo Ponce, J. C. A., Shafeek, L. B., Cramer, T., &#38; Waitukaitis, S. R. (2022). Quantifying nanoscale charge density features of contact-charged surfaces with an FEM/KPFM-hybrid approach. <i>Physical Review Materials</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevMaterials.6.125605\">https://doi.org/10.1103/PhysRevMaterials.6.125605</a>"},"date_updated":"2026-08-27T11:42:43Z","oa_version":"Preprint","date_created":"2023-01-08T23:00:53Z","project":[{"_id":"0aa60e99-070f-11eb-9043-a6de6bdc3afa","call_identifier":"H2020","name":"Tribocharge: a multi-scale approach to an enduring problem in physics","grant_number":"949120"}],"doi":"10.1103/PhysRevMaterials.6.125605","date_published":"2022-12-29T00:00:00Z","title":"Quantifying nanoscale charge density features of contact-charged surfaces with an FEM/KPFM-hybrid approach","corr_author":"1","external_id":{"isi":["000908384800001"],"arxiv":["2209.01889"]},"related_material":{"record":[{"status":"public","relation":"dissertation_contains","id":"20203"},{"status":"public","relation":"dissertation_contains","id":"22684"}]},"language":[{"iso":"eng"}],"publisher":"American Physical Society","publication_status":"published","department":[{"_id":"ScWa"},{"_id":"NanoFab"}],"issue":"12","month":"12","day":"29","article_processing_charge":"No","publication":"Physical Review Materials","isi":1,"fulldoi":"https://doi.org/10.1103/PhysRevMaterials.6.125605","scopus_import":"1","main_file_link":[{"open_access":"1","url":" https://doi.org/10.48550/arXiv.2209.01889"}],"article_type":"original","article_number":"125605","oa":1,"publication_identifier":{"eissn":["2475-9953"]},"volume":6,"acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"},{"_id":"ScienComp"}],"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","arxiv":1,"acknowledgement":"This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement\r\nNo. 949120). This research was supported by the Scientific Service Units of the Institute of Science and Technology Austria (ISTA) through resources provided by the Miba Machine\r\nShop, the Nanofabrication Facility, and the Scientific Computing Facility. We thank F. Stumpf from Park Systems for useful discussions and support with scanning probe microscopy.\r\nF.P. and J.C.S. contributed equally to this work.","_id":"12109","author":[{"full_name":"Pertl, Felix","id":"6313aec0-15b2-11ec-abd3-ed67d16139af","orcid":"0000-0003-0463-5794","first_name":"Felix","last_name":"Pertl"},{"last_name":"Sobarzo Ponce","first_name":"Juan Carlos A","id":"4B807D68-AE37-11E9-AC72-31CAE5697425","full_name":"Sobarzo Ponce, Juan Carlos A"},{"first_name":"Lubuna B","last_name":"Shafeek","full_name":"Shafeek, Lubuna B","id":"3CD37A82-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-7180-6050"},{"first_name":"Tobias","last_name":"Cramer","full_name":"Cramer, Tobias"},{"last_name":"Waitukaitis","first_name":"Scott R","orcid":"0000-0002-2299-3176","full_name":"Waitukaitis, Scott R","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87"}],"abstract":[{"text":"Kelvin probe force microscopy (KPFM) is a powerful tool for studying contact electrification (CE) at the nanoscale, but converting KPFM voltage maps to charge density maps is nontrivial due to long-range forces and complex system geometry. Here we present a strategy using finite-element method (FEM) simulations to determine the Green's function of the KPFM probe/insulator/ground system, which allows us to quantitatively extract surface charge. Testing our approach with synthetic data, we find that accounting for the atomic force microscope (AFM) tip, cone, and cantilever is necessary to recover a known input and that existing methods lead to gross miscalculation or even the incorrect sign of the underlying charge. Applying it to experimental data, we demonstrate its capacity to extract realistic surface charge densities and fine details from contact-charged surfaces. Our method gives a straightforward recipe to convert qualitative KPFM voltage data into quantitative charge data over a range of experimental conditions, enabling quantitative CE at the nanoscale.","lang":"eng"}],"type":"journal_article"},{"oa_version":"Published Version","date_created":"2021-05-23T22:01:44Z","date_updated":"2025-07-10T12:01:45Z","ddc":["530"],"title":"Regimes of motion of magnetocapillary swimmers","external_id":{"isi":["000643251300001"]},"doi":"10.1140/epje/s10189-021-00065-2","date_published":"2021-04-24T00:00:00Z","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"publisher":"Springer","language":[{"iso":"eng"}],"quality_controlled":"1","status":"public","year":"2021","intvolume":"        44","citation":{"ieee":"A. Sukhov <i>et al.</i>, “Regimes of motion of magnetocapillary swimmers,” <i>European Physical Journal E</i>, vol. 44, no. 4. Springer, 2021.","mla":"Sukhov, Alexander, et al. “Regimes of Motion of Magnetocapillary Swimmers.” <i>European Physical Journal E</i>, vol. 44, no. 4, 59, Springer, 2021, doi:<a href=\"https://doi.org/10.1140/epje/s10189-021-00065-2\">10.1140/epje/s10189-021-00065-2</a>.","short":"A. Sukhov, M. Hubert, G.M. Grosjean, O. Trosman, S. Ziegler, Y. Collard, N. Vandewalle, A.S. Smith, J. Harting, European Physical Journal E 44 (2021).","chicago":"Sukhov, Alexander, Maxime Hubert, Galien M Grosjean, Oleg Trosman, Sebastian Ziegler, Ylona Collard, Nicolas Vandewalle, Ana Sunčana Smith, and Jens Harting. “Regimes of Motion of Magnetocapillary Swimmers.” <i>European Physical Journal E</i>. Springer, 2021. <a href=\"https://doi.org/10.1140/epje/s10189-021-00065-2\">https://doi.org/10.1140/epje/s10189-021-00065-2</a>.","apa":"Sukhov, A., Hubert, M., Grosjean, G. M., Trosman, O., Ziegler, S., Collard, Y., … Harting, J. (2021). Regimes of motion of magnetocapillary swimmers. <i>European Physical Journal E</i>. Springer. <a href=\"https://doi.org/10.1140/epje/s10189-021-00065-2\">https://doi.org/10.1140/epje/s10189-021-00065-2</a>","ama":"Sukhov A, Hubert M, Grosjean GM, et al. Regimes of motion of magnetocapillary swimmers. <i>European Physical Journal E</i>. 2021;44(4). doi:<a href=\"https://doi.org/10.1140/epje/s10189-021-00065-2\">10.1140/epje/s10189-021-00065-2</a>","ista":"Sukhov A, Hubert M, Grosjean GM, Trosman O, Ziegler S, Collard Y, Vandewalle N, Smith AS, Harting J. 2021. Regimes of motion of magnetocapillary swimmers. European Physical Journal E. 44(4), 59."},"publication_identifier":{"issn":["1292-8941"],"eissn":["1292-895X"]},"volume":44,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","_id":"9411","author":[{"full_name":"Sukhov, Alexander","last_name":"Sukhov","first_name":"Alexander"},{"full_name":"Hubert, Maxime","first_name":"Maxime","last_name":"Hubert"},{"first_name":"Galien M","last_name":"Grosjean","orcid":"0000-0001-5154-417X","id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","full_name":"Grosjean, Galien M"},{"full_name":"Trosman, Oleg","last_name":"Trosman","first_name":"Oleg"},{"last_name":"Ziegler","first_name":"Sebastian","full_name":"Ziegler, Sebastian"},{"full_name":"Collard, Ylona","last_name":"Collard","first_name":"Ylona"},{"full_name":"Vandewalle, Nicolas","first_name":"Nicolas","last_name":"Vandewalle"},{"full_name":"Smith, Ana Sunčana","first_name":"Ana Sunčana","last_name":"Smith"},{"full_name":"Harting, Jens","last_name":"Harting","first_name":"Jens"}],"acknowledgement":"This work was financially supported by the DFG Priority Programme SPP 1726 “Microswimmers–From Single Particle Motion to Collective Behaviour” (HA 4382/5-1). We further acknowledge the Jülich Supercomputing Centre (JSC) and the High Performance Computing Centre Stuttgart (HLRS) for the allocation of computing time.","type":"journal_article","abstract":[{"text":"The dynamics of a triangular magnetocapillary swimmer is studied using the lattice Boltzmann method. We extend on our previous work, which deals with the self-assembly and a specific type of the swimmer motion characterized by the swimmer’s maximum velocity centred around the particle’s inverse viscous time. Here, we identify additional regimes of motion. First, modifying the ratio of surface tension and magnetic forces allows to study the swimmer propagation in the regime of significantly lower frequencies mainly defined by the strength of the magnetocapillary potential. Second, introducing a constant magnetic contribution in each of the particles in addition to their magnetic moment induced by external fields leads to another regime characterized by strong in-plane swimmer reorientations that resemble experimental observations.","lang":"eng"}],"publication_status":"published","department":[{"_id":"ScWa"}],"issue":"4","day":"24","month":"04","has_accepted_license":"1","fulldoi":"https://doi.org/10.1140/epje/s10189-021-00065-2","scopus_import":"1","article_processing_charge":"No","publication":"European Physical Journal E","isi":1,"file":[{"file_name":"2021_EPJE_Sukhov.pdf","relation":"main_file","success":1,"file_id":"9422","checksum":"0ef342d011afbe3c5cb058fda9a3f395","creator":"kschuh","access_level":"open_access","content_type":"application/pdf","date_updated":"2021-05-25T11:32:14Z","file_size":2507870,"date_created":"2021-05-25T11:32:14Z"}],"file_date_updated":"2021-05-25T11:32:14Z","oa":1,"article_number":"59"},{"abstract":[{"lang":"eng","text":"When tiny soft ferromagnetic particles are placed along a liquid interface and exposed to a vertical magnetic field, the balance between capillary attraction and magnetic repulsion leads to self-organization into well-defined patterns. Here, we demonstrate experimentally that precessing magnetic fields induce metachronal waves on the periphery of these assemblies, similar to the ones observed in ciliates and some arthropods. The outermost layer of particles behaves like an array of cilia or legs whose sequential movement causes a net and controllable locomotion. This bioinspired many-particle swimming strategy is effective even at low Reynolds number, using only spatially uniform fields to generate the waves."}],"type":"journal_article","_id":"8036","author":[{"first_name":"Ylona","last_name":"Collard","full_name":"Collard, Ylona"},{"first_name":"Galien M","last_name":"Grosjean","full_name":"Grosjean, Galien M","id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","orcid":"0000-0001-5154-417X"},{"full_name":"Vandewalle, Nicolas","first_name":"Nicolas","last_name":"Vandewalle"}],"user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","volume":3,"publication_identifier":{"eissn":["2399-3650"]},"article_number":"112","article_type":"original","oa":1,"file_date_updated":"2020-07-14T12:48:08Z","file":[{"creator":"cziletti","checksum":"ed984f7a393f19140b5279a54a3336ad","access_level":"open_access","content_type":"application/pdf","file_size":1907821,"date_updated":"2020-07-14T12:48:08Z","date_created":"2020-06-29T13:21:24Z","file_name":"2020_CommunicationsPhysics_Collard.pdf","relation":"main_file","file_id":"8045"}],"publication":"Communications Physics","isi":1,"article_processing_charge":"No","scopus_import":"1","fulldoi":"https://doi.org/10.1038/s42005-020-0380-9","has_accepted_license":"1","month":"06","day":"19","publication_status":"published","department":[{"_id":"ScWa"}],"publisher":"Springer Nature","language":[{"iso":"eng"}],"tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"date_published":"2020-06-19T00:00:00Z","doi":"10.1038/s42005-020-0380-9","title":"Magnetically powered metachronal waves induce locomotion in self-assemblies","external_id":{"isi":["000543328000002"]},"ddc":["530"],"date_updated":"2026-04-02T14:34:21Z","project":[{"_id":"260C2330-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"ISTplus - Postdoctoral Fellowships","grant_number":"754411"}],"oa_version":"Published Version","date_created":"2020-06-29T07:59:35Z","citation":{"ista":"Collard Y, Grosjean GM, Vandewalle N. 2020. Magnetically powered metachronal waves induce locomotion in self-assemblies. Communications Physics. 3, 112.","apa":"Collard, Y., Grosjean, G. M., &#38; Vandewalle, N. (2020). Magnetically powered metachronal waves induce locomotion in self-assemblies. <i>Communications Physics</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s42005-020-0380-9\">https://doi.org/10.1038/s42005-020-0380-9</a>","ama":"Collard Y, Grosjean GM, Vandewalle N. Magnetically powered metachronal waves induce locomotion in self-assemblies. <i>Communications Physics</i>. 2020;3. doi:<a href=\"https://doi.org/10.1038/s42005-020-0380-9\">10.1038/s42005-020-0380-9</a>","mla":"Collard, Ylona, et al. “Magnetically Powered Metachronal Waves Induce Locomotion in Self-Assemblies.” <i>Communications Physics</i>, vol. 3, 112, Springer Nature, 2020, doi:<a href=\"https://doi.org/10.1038/s42005-020-0380-9\">10.1038/s42005-020-0380-9</a>.","ieee":"Y. Collard, G. M. Grosjean, and N. Vandewalle, “Magnetically powered metachronal waves induce locomotion in self-assemblies,” <i>Communications Physics</i>, vol. 3. Springer Nature, 2020.","chicago":"Collard, Ylona, Galien M Grosjean, and Nicolas Vandewalle. “Magnetically Powered Metachronal Waves Induce Locomotion in Self-Assemblies.” <i>Communications Physics</i>. Springer Nature, 2020. <a href=\"https://doi.org/10.1038/s42005-020-0380-9\">https://doi.org/10.1038/s42005-020-0380-9</a>.","short":"Y. Collard, G.M. Grosjean, N. Vandewalle, Communications Physics 3 (2020)."},"intvolume":"         3","year":"2020","status":"public","quality_controlled":"1","ec_funded":1},{"has_accepted_license":"1","day":"17","month":"08","issue":"8","department":[{"_id":"ScWa"}],"publication_status":"published","oa":1,"file":[{"checksum":"288fef1eeb6540c6344bb8f7c8159dc9","creator":"ggrosjea","date_updated":"2020-08-17T15:54:20Z","file_size":853753,"content_type":"application/pdf","access_level":"open_access","date_created":"2020-08-17T15:54:20Z","relation":"main_file","file_name":"Grosjean2020.pdf","file_id":"8277","success":1}],"file_date_updated":"2020-08-17T15:54:20Z","article_number":"082602","article_type":"original","scopus_import":"1","fulldoi":"https://doi.org/10.1103/PhysRevMaterials.4.082602","publication":"Physical Review Materials","isi":1,"article_processing_charge":"Yes","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","volume":4,"publication_identifier":{"issn":["2475-9953"]},"type":"journal_article","abstract":[{"lang":"eng","text":"By rigorously accounting for mesoscale spatial correlations in donor/acceptor surface properties, we develop a scale-spanning model for same-material tribocharging. We find that mesoscale correlations affect not only the magnitude of charge transfer but also the fluctuations—suppressing otherwise overwhelming charge-transfer variability that is not observed experimentally. We furthermore propose a generic theoretical mechanism by which the mesoscale features might emerge, which is qualitatively consistent with other proposals in the literature."}],"_id":"8101","author":[{"first_name":"Galien M","last_name":"Grosjean","full_name":"Grosjean, Galien M","id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","orcid":"0000-0001-5154-417X"},{"id":"133F200A-B015-11E9-AD41-0EDAE5697425","full_name":"Wald, Sebastian","orcid":"0000-0002-5869-1604","first_name":"Sebastian","last_name":"Wald"},{"last_name":"Sobarzo Ponce","first_name":"Juan Carlos A","full_name":"Sobarzo Ponce, Juan Carlos A","id":"4B807D68-AE37-11E9-AC72-31CAE5697425"},{"full_name":"Waitukaitis, Scott R","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2299-3176","first_name":"Scott R","last_name":"Waitukaitis"}],"acknowledgement":"We would like to thank Philip Born, Bartosz Grzybowski, Tarik Baytekin, and Bilge Baytekin for helpful discussions.\r\nThis project has received funding from the European Unions Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 754411.","arxiv":1,"year":"2020","status":"public","quality_controlled":"1","ec_funded":1,"citation":{"chicago":"Grosjean, Galien M, Sebastian Wald, Juan Carlos A Sobarzo Ponce, and Scott R Waitukaitis. “Quantitatively Consistent Scale-Spanning Model for Same-Material Tribocharging.” <i>Physical Review Materials</i>. American Physical Society, 2020. <a href=\"https://doi.org/10.1103/PhysRevMaterials.4.082602\">https://doi.org/10.1103/PhysRevMaterials.4.082602</a>.","short":"G.M. Grosjean, S. Wald, J.C.A. Sobarzo Ponce, S.R. Waitukaitis, Physical Review Materials 4 (2020).","mla":"Grosjean, Galien M., et al. “Quantitatively Consistent Scale-Spanning Model for Same-Material Tribocharging.” <i>Physical Review Materials</i>, vol. 4, no. 8, 082602, American Physical Society, 2020, doi:<a href=\"https://doi.org/10.1103/PhysRevMaterials.4.082602\">10.1103/PhysRevMaterials.4.082602</a>.","ieee":"G. M. Grosjean, S. Wald, J. C. A. Sobarzo Ponce, and S. R. Waitukaitis, “Quantitatively consistent scale-spanning model for same-material tribocharging,” <i>Physical Review Materials</i>, vol. 4, no. 8. American Physical Society, 2020.","ama":"Grosjean GM, Wald S, Sobarzo Ponce JCA, Waitukaitis SR. Quantitatively consistent scale-spanning model for same-material tribocharging. <i>Physical Review Materials</i>. 2020;4(8). doi:<a href=\"https://doi.org/10.1103/PhysRevMaterials.4.082602\">10.1103/PhysRevMaterials.4.082602</a>","apa":"Grosjean, G. M., Wald, S., Sobarzo Ponce, J. C. A., &#38; Waitukaitis, S. R. (2020). Quantitatively consistent scale-spanning model for same-material tribocharging. <i>Physical Review Materials</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevMaterials.4.082602\">https://doi.org/10.1103/PhysRevMaterials.4.082602</a>","ista":"Grosjean GM, Wald S, Sobarzo Ponce JCA, Waitukaitis SR. 2020. Quantitatively consistent scale-spanning model for same-material tribocharging. Physical Review Materials. 4(8), 082602."},"intvolume":"         4","external_id":{"arxiv":["2006.07120"],"isi":["000561897000001"]},"corr_author":"1","title":"Quantitatively consistent scale-spanning model for same-material tribocharging","date_published":"2020-08-17T00:00:00Z","doi":"10.1103/PhysRevMaterials.4.082602","keyword":["electric charge","tribocharging","soft matter","granular materials","polymers"],"project":[{"grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","_id":"260C2330-B435-11E9-9278-68D0E5697425"}],"date_created":"2020-07-07T11:33:54Z","oa_version":"Published Version","ddc":["530"],"date_updated":"2025-04-23T08:51:12Z","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"language":[{"iso":"eng"}],"publisher":"American Physical Society","related_material":{"record":[{"status":"public","id":"12697","relation":"popular_science"}]}},{"fulldoi":"https://doi.org/10.1039/c9sm00756c","scopus_import":"1","article_processing_charge":"No","publication":"Soft Matter","isi":1,"article_type":"original","publication_status":"published","department":[{"_id":"ScWa"}],"issue":"29","month":"07","day":"15","author":[{"first_name":"Hamza K.","last_name":"Khattak","full_name":"Khattak, Hamza K."},{"id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","full_name":"Waitukaitis, Scott R","orcid":"0000-0002-2299-3176","first_name":"Scott R","last_name":"Waitukaitis"},{"full_name":"Slepkov, Aaron D.","last_name":"Slepkov","first_name":"Aaron D."}],"_id":"6763","type":"journal_article","abstract":[{"lang":"eng","text":"When grape-sized aqueous dimers are irradiated in a microwave oven, an intense electromagnetic hotspot forms at their point of contact, often igniting a plasma. Here we show that this irradiation can result in the injection of mechanical energy. By examining irradiated hydrogel dimers through high-speed imaging, we find that they repeatedly bounce off of each other while irradiated. We determine that an average of 1 lJ of mechanical energy is injected into the pair during each collision. Furthermore, a characteristic high-pitched audio signal is found to accompany each collision.\r\nWe show that both the audio signal and the energy injection arise via an interplay between vaporization and elastic deformations in the region of contact, the so-called ‘elastic Liedenfrost effect’. Our results establish a novel, non-contact method of injecting mechanical energy into soft matter systems, suggesting application in fields such as soft robotics."}],"page":"5804-5809","publication_identifier":{"issn":["1744-683X"],"eissn":["1744-6848"]},"volume":15,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","intvolume":"        15","citation":{"apa":"Khattak, H. K., Waitukaitis, S. R., &#38; Slepkov, A. D. (2019). Microwave induced mechanical activation of hydrogel dimers. <i>Soft Matter</i>. Royal Society of Chemistry. <a href=\"https://doi.org/10.1039/c9sm00756c\">https://doi.org/10.1039/c9sm00756c</a>","ama":"Khattak HK, Waitukaitis SR, Slepkov AD. Microwave induced mechanical activation of hydrogel dimers. <i>Soft Matter</i>. 2019;15(29):5804-5809. doi:<a href=\"https://doi.org/10.1039/c9sm00756c\">10.1039/c9sm00756c</a>","mla":"Khattak, Hamza K., et al. “Microwave Induced Mechanical Activation of Hydrogel Dimers.” <i>Soft Matter</i>, vol. 15, no. 29, Royal Society of Chemistry, 2019, pp. 5804–09, doi:<a href=\"https://doi.org/10.1039/c9sm00756c\">10.1039/c9sm00756c</a>.","ieee":"H. K. Khattak, S. R. Waitukaitis, and A. D. Slepkov, “Microwave induced mechanical activation of hydrogel dimers,” <i>Soft Matter</i>, vol. 15, no. 29. Royal Society of Chemistry, pp. 5804–5809, 2019.","short":"H.K. Khattak, S.R. Waitukaitis, A.D. Slepkov, Soft Matter 15 (2019) 5804–5809.","chicago":"Khattak, Hamza K., Scott R Waitukaitis, and Aaron D. Slepkov. “Microwave Induced Mechanical Activation of Hydrogel Dimers.” <i>Soft Matter</i>. Royal Society of Chemistry, 2019. <a href=\"https://doi.org/10.1039/c9sm00756c\">https://doi.org/10.1039/c9sm00756c</a>.","ista":"Khattak HK, Waitukaitis SR, Slepkov AD. 2019. Microwave induced mechanical activation of hydrogel dimers. Soft Matter. 15(29), 5804–5809."},"status":"public","quality_controlled":"1","year":"2019","language":[{"iso":"eng"}],"publisher":"Royal Society of Chemistry","oa_version":"None","date_created":"2019-08-04T21:59:21Z","date_updated":"2025-07-10T11:53:49Z","pmid":1,"title":"Microwave induced mechanical activation of hydrogel dimers","external_id":{"isi":["000476909200002"],"pmid":["31305853"]},"doi":"10.1039/c9sm00756c","date_published":"2019-07-15T00:00:00Z"}]