[{"ec_funded":1,"intvolume":"       651","file_date_updated":"2026-03-24T06:57:08Z","publication":"Nature","author":[{"first_name":"Galien M","id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","full_name":"Grosjean, Galien M","last_name":"Grosjean","orcid":"0000-0001-5154-417X"},{"first_name":"Markus","full_name":"Ostermann, Markus","last_name":"Ostermann"},{"full_name":"Sauer, Markus","last_name":"Sauer","first_name":"Markus"},{"first_name":"Michael","last_name":"Hahn","full_name":"Hahn, Michael"},{"first_name":"Christian M.","last_name":"Pichler","full_name":"Pichler, Christian M."},{"first_name":"Florian","last_name":"Fahrnberger","full_name":"Fahrnberger, Florian"},{"id":"6313aec0-15b2-11ec-abd3-ed67d16139af","first_name":"Felix","full_name":"Pertl, Felix","last_name":"Pertl","orcid":"0000-0003-0463-5794"},{"orcid":"0000-0001-7597-043X","full_name":"Balazs, Daniel","last_name":"Balazs","id":"302BADF6-85FC-11EA-9E3B-B9493DDC885E","first_name":"Daniel"},{"full_name":"Link, Mason M.","last_name":"Link","first_name":"Mason M."},{"full_name":"Kim, Seong H.","last_name":"Kim","first_name":"Seong H."},{"full_name":"Schrader, Devin L.","last_name":"Schrader","first_name":"Devin L."},{"first_name":"Adriana","full_name":"Blanco, Adriana","last_name":"Blanco"},{"last_name":"Gracia","full_name":"Gracia, Francisco","first_name":"Francisco"},{"full_name":"Mujica, Nicolás","last_name":"Mujica","first_name":"Nicolás"},{"orcid":"0000-0002-2299-3176","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","first_name":"Scott R","full_name":"Waitukaitis, Scott R","last_name":"Waitukaitis"}],"oa":1,"publication_identifier":{"issn":["0028-0836"],"eissn":["1476-4687"]},"file":[{"file_size":12245694,"date_created":"2026-03-24T06:57:08Z","file_id":"21494","creator":"dernst","file_name":"2026_Nature_Grosjean.pdf","date_updated":"2026-03-24T06:57:08Z","checksum":"dafef9ed575b44be4263e948a47ae056","content_type":"application/pdf","success":1,"relation":"main_file","access_level":"open_access"}],"acknowledgement":"This project has received support from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 949120) and from the Marie Skłodowska-Curie programme (grant agreement no. 754411). We acknowledge the state of Lower Austria and the European Regional Development Fund under grant no. WST3-F-542638/004-2021. N.M. acknowledges support from grant Fondecyt 1221597. G.G. is a Serra Húnter fellow. This research was supported by the Scientific Service Units of the Institute of Science and Technology Austria through resources provided by the Miba Machine Shop, Nanofabrication Facility, Scientific Computing facility and Lab Support Facility. We thank the Modic group for the use of the Laue camera, T. Zauner for the photography of the experimental set-up and R. Möller for insightful discussions. Open access funding provided by Institute of Science and Technology (IST Austria).","pmid":1,"language":[{"iso":"eng"}],"corr_author":"1","external_id":{"pmid":["41851325"]},"department":[{"_id":"ScWa"},{"_id":"GradSch"},{"_id":"LifeSc"}],"date_created":"2026-03-23T15:04:00Z","publication_status":"published","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"},{"_id":"ScienComp"},{"_id":"LifeSc"}],"license":"https://creativecommons.org/licenses/by/4.0/","abstract":[{"text":"Insulating oxides are among the most abundant solid materials in the universe1,2,3. Of the many ways in which they influence natural phenomena, perhaps the most consequential is their capacity to transfer electrical charge during contact4,5,6,7,8,9,10—which occurs even between samples of the same oxide—yet the symmetry-breaking parameter that causes this remains unidentified11,12. Here we show that adventitious carbonaceous molecules adsorbed from the environment are the symmetry-breaking factor in same-material oxide contact electrification (CE). We use acoustic levitation to measure charge exchange between a sphere and a plate composed of identical amorphous silicon dioxide (SiO2). Although charging polarity is random for co-prepared samples, we control it with baking or plasma treatment. Observing the charge-exchange relaxation afterwards, we see dynamics over a timescale of hours and connect this directly to the presence of adventitious carbon with time-of-flight mass spectrometry, low-energy ion scattering and infrared spectroscopy. Going further, we confirm that adventitious carbon can even determine charge exchange among different oxides. Our results identify the symmetry-breaking parameter that causes insulating oxides to exchange charge in settings ranging from desert sands4 to volcanic plumes5,6, while simultaneously highlighting an overlooked factor in CE more broadly.","lang":"eng"}],"quality_controlled":"1","volume":651,"page":"626-631","user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","year":"2026","oa_version":"Published Version","date_updated":"2026-04-28T12:06:01Z","date_published":"2026-03-18T00:00:00Z","has_accepted_license":"1","project":[{"call_identifier":"H2020","name":"Tribocharge: a multi-scale approach to an enduring problem in physics","_id":"0aa60e99-070f-11eb-9043-a6de6bdc3afa","grant_number":"949120"},{"name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","_id":"260C2330-B435-11E9-9278-68D0E5697425","grant_number":"754411"}],"publisher":"Springer Nature","day":"18","type":"journal_article","issue":"8106","tmp":{"short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"status":"public","doi":"10.1038/s41586-025-10088-w","OA_place":"publisher","OA_type":"hybrid","article_type":"original","ddc":["540"],"citation":{"short":"G.M. Grosjean, M. Ostermann, M. Sauer, M. Hahn, C.M. Pichler, F. Fahrnberger, F. Pertl, D. Balazs, M.M. Link, S.H. Kim, D.L. Schrader, A. Blanco, F. Gracia, N. Mujica, S.R. Waitukaitis, Nature 651 (2026) 626–631.","mla":"Grosjean, Galien M., et al. “Adventitious Carbon Breaks Symmetry in Oxide Contact Electrification.” <i>Nature</i>, vol. 651, no. 8106, Springer Nature, 2026, pp. 626–31, doi:<a href=\"https://doi.org/10.1038/s41586-025-10088-w\">10.1038/s41586-025-10088-w</a>.","ieee":"G. M. Grosjean <i>et al.</i>, “Adventitious carbon breaks symmetry in oxide contact electrification,” <i>Nature</i>, vol. 651, no. 8106. Springer Nature, pp. 626–631, 2026.","apa":"Grosjean, G. M., Ostermann, M., Sauer, M., Hahn, M., Pichler, C. M., Fahrnberger, F., … Waitukaitis, S. R. (2026). Adventitious carbon breaks symmetry in oxide contact electrification. <i>Nature</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41586-025-10088-w\">https://doi.org/10.1038/s41586-025-10088-w</a>","ama":"Grosjean GM, Ostermann M, Sauer M, et al. Adventitious carbon breaks symmetry in oxide contact electrification. <i>Nature</i>. 2026;651(8106):626-631. doi:<a href=\"https://doi.org/10.1038/s41586-025-10088-w\">10.1038/s41586-025-10088-w</a>","ista":"Grosjean GM, Ostermann M, Sauer M, Hahn M, Pichler CM, Fahrnberger F, Pertl F, Balazs D, Link MM, Kim SH, Schrader DL, Blanco A, Gracia F, Mujica N, Waitukaitis SR. 2026. Adventitious carbon breaks symmetry in oxide contact electrification. Nature. 651(8106), 626–631.","chicago":"Grosjean, Galien M, Markus Ostermann, Markus Sauer, Michael Hahn, Christian M. Pichler, Florian Fahrnberger, Felix Pertl, et al. “Adventitious Carbon Breaks Symmetry in Oxide Contact Electrification.” <i>Nature</i>. Springer Nature, 2026. <a href=\"https://doi.org/10.1038/s41586-025-10088-w\">https://doi.org/10.1038/s41586-025-10088-w</a>."},"related_material":{"link":[{"relation":"press_release","url":"https://ista.ac.at/en/news/colliding-dust-and-the-sparks-of-creation/","description":"News on ISTA website"}]},"PlanS_conform":"1","article_processing_charge":"Yes (via OA deal)","title":"Adventitious carbon breaks symmetry in oxide contact electrification","month":"03","_id":"21485"},{"doi":"10.1073/pnas.2516865122","OA_place":"publisher","article_type":"original","OA_type":"hybrid","arxiv":1,"ddc":["530"],"article_processing_charge":"Yes (in subscription journal)","citation":{"chicago":"Shi, Sue, Maximilian Hübl, Galien M Grosjean, Carl Peter Goodrich, and Scott R Waitukaitis. “Electrostatics Overcome Acoustic Collapse to Assemble, Adapt, and Activate Levitated Matter.” <i>Proceedings of the National Academy of Sciences</i>. National Academy of Sciences, 2025. <a href=\"https://doi.org/10.1073/pnas.2516865122\">https://doi.org/10.1073/pnas.2516865122</a>.","ista":"Shi S, Hübl M, Grosjean GM, Goodrich CP, Waitukaitis SR. 2025. Electrostatics overcome acoustic collapse to assemble, adapt, and activate levitated matter. Proceedings of the National Academy of Sciences. 122(50), e2516865122.","ama":"Shi S, Hübl M, Grosjean GM, Goodrich CP, Waitukaitis SR. Electrostatics overcome acoustic collapse to assemble, adapt, and activate levitated matter. <i>Proceedings of the National Academy of Sciences</i>. 2025;122(50):e2516865122. doi:<a href=\"https://doi.org/10.1073/pnas.2516865122\">10.1073/pnas.2516865122</a>","apa":"Shi, S., Hübl, M., Grosjean, G. M., Goodrich, C. P., &#38; Waitukaitis, S. R. (2025). Electrostatics overcome acoustic collapse to assemble, adapt, and activate levitated matter. <i>Proceedings of the National Academy of Sciences</i>. National Academy of Sciences. <a href=\"https://doi.org/10.1073/pnas.2516865122\">https://doi.org/10.1073/pnas.2516865122</a>","ieee":"S. Shi, M. Hübl, G. M. Grosjean, C. P. Goodrich, and S. R. Waitukaitis, “Electrostatics overcome acoustic collapse to assemble, adapt, and activate levitated matter,” <i>Proceedings of the National Academy of Sciences</i>, vol. 122, no. 50. National Academy of Sciences, p. e2516865122, 2025.","short":"S. Shi, M. Hübl, G.M. Grosjean, C.P. Goodrich, S.R. Waitukaitis, Proceedings of the National Academy of Sciences 122 (2025) e2516865122.","mla":"Shi, Sue, et al. “Electrostatics Overcome Acoustic Collapse to Assemble, Adapt, and Activate Levitated Matter.” <i>Proceedings of the National Academy of Sciences</i>, vol. 122, no. 50, National Academy of Sciences, 2025, p. e2516865122, doi:<a href=\"https://doi.org/10.1073/pnas.2516865122\">10.1073/pnas.2516865122</a>."},"related_material":{"record":[{"id":"20749","status":"public","relation":"research_data"}],"link":[{"url":"https://ista.ac.at/en/news/science-is-like-magic-just-real/","relation":"press_release","description":"News on ISTA website"}]},"_id":"20727","title":"Electrostatics overcome acoustic collapse to assemble, adapt, and activate levitated matter","month":"12","user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","page":"e2516865122","has_accepted_license":"1","date_published":"2025-12-16T00:00:00Z","project":[{"_id":"8dd93da8-16d5-11f0-9cad-d2c70200d9a5","grant_number":"FTI23-G-011","name":"Dynamically reconfigurable self-assembly with triangular DNA-origami bricks"}],"year":"2025","oa_version":"Published Version","date_updated":"2026-04-28T13:00:10Z","type":"journal_article","day":"16","publisher":"National Academy of Sciences","issue":"50","status":"public","tmp":{"name":"Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)","image":"/images/cc_by_nc_nd.png","short":"CC BY-NC-ND (4.0)","legal_code_url":"https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode"},"department":[{"_id":"ScWa"},{"_id":"CaGo"}],"external_id":{"arxiv":["2507.01739"]},"date_created":"2025-12-07T23:02:00Z","corr_author":"1","language":[{"iso":"eng"}],"publication_status":"published","abstract":[{"text":"Acoustic levitation provides a unique method for manipulating small particles as it completely evades effects from gravity, container walls, or physical handling. These advantages make it a tantalizing platform for studying complex phenomena in many-particle systems. In most standing-wave traps, however, particles interact via acoustic scattering forces that cause them to merge into a single dense object. Here, we introduce a complementary approach that combines acoustic levitation with electrostatic charging to assemble, adapt, and activate complex, separated many-particle systems. The key idea is to superimpose electrostatic repulsion on the intrinsic acoustic attraction, rendering a so-called “mermaid” potential where interactions are attractive at short range and repulsive at long range. By controlling the attraction–repulsion balance, we can levitate expanded structures where all particles are separated, collapsed structures where they are in contact, and hybrid ones consisting of both expanded and collapsed components. We find that collapsed and expanded structures are inherently stable, whereas hybrid ones exhibit transient stability governed by acoustically unstable dimers. Furthermore, we show how electrostatics allow us to adapt between configurations on the fly, either by quasistatic discharge or discrete up/down charge steps. Finally, we demonstrate how large structures experience selective energy pumping from the acoustic field—thrusting some particles into motion while others remain stationary—leading to complex dynamics including coupled rotations and oscillations. Our approach establishes a design space beyond acoustic collapse, offering possibilities to study many-particle systems with complex interactions, while suggesting pathways toward scalable integration into materials processing and other applications.","lang":"eng"}],"license":"https://creativecommons.org/licenses/by-nc-nd/4.0/","acknowledged_ssus":[{"_id":"M-Shop"}],"volume":122,"quality_controlled":"1","scopus_import":"1","author":[{"full_name":"Shi, Sue","last_name":"Shi","first_name":"Sue","id":"5c5b9247-15b2-11ec-abd3-fd958715639c"},{"last_name":"Hübl","full_name":"Hübl, Maximilian","id":"5eb8629e-15b2-11ec-abd3-e6f3e5e01f32","first_name":"Maximilian"},{"first_name":"Galien M","id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","last_name":"Grosjean","full_name":"Grosjean, Galien M","orcid":"0000-0001-5154-417X"},{"id":"EB352CD2-F68A-11E9-89C5-A432E6697425","first_name":"Carl Peter","last_name":"Goodrich","full_name":"Goodrich, Carl Peter","orcid":"0000-0002-1307-5074"},{"orcid":"0000-0002-2299-3176","last_name":"Waitukaitis","full_name":"Waitukaitis, Scott R","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","first_name":"Scott R"}],"file_date_updated":"2025-12-09T12:45:53Z","publication":"Proceedings of the National Academy of Sciences","intvolume":"       122","file":[{"file_size":10621381,"date_created":"2025-12-09T12:45:53Z","file_id":"20744","creator":"dernst","file_name":"2025_PNAS_Shi.pdf","date_updated":"2025-12-09T12:45:53Z","checksum":"c40dc4c909724b9d1146636612e8821a","content_type":"application/pdf","success":1,"relation":"main_file","access_level":"open_access"}],"acknowledgement":"We thank Dustin Kleckner, Jack-William Barotta, and Daniel M. Harris for insightful discussions. We acknowledge the Miba machine shop at the Institute of Science and Technology Austria for instrumentation support. M.C.H. and C.P.G. acknowledge funding by the Gesellschaft für Forschungsförderung Niederösterreich under project FTI23-G-011.","oa":1,"publication_identifier":{"eissn":["1091-6490"]}},{"month":"03","title":"Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media","_id":"12697","related_material":{"record":[{"id":"8101","status":"public","relation":"research_paper"}]},"citation":{"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>","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>","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.","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."},"article_processing_charge":"No","ddc":["530","537"],"arxiv":1,"article_type":"original","doi":"10.1103/physrevlett.130.098202","tmp":{"short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"status":"public","issue":"9","publisher":"American Physical Society","day":"03","type":"journal_article","date_updated":"2025-04-23T08:51:13Z","year":"2023","oa_version":"Preprint","date_published":"2023-03-03T00:00:00Z","has_accepted_license":"1","project":[{"_id":"0aa60e99-070f-11eb-9043-a6de6bdc3afa","grant_number":"949120","name":"Tribocharge: a multi-scale approach to an enduring problem in physics","call_identifier":"H2020"},{"_id":"260C2330-B435-11E9-9278-68D0E5697425","grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","quality_controlled":"1","volume":130,"article_number":"098202","abstract":[{"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.","lang":"eng"}],"publication_status":"published","language":[{"iso":"eng"}],"corr_author":"1","date_created":"2023-02-28T12:14:46Z","department":[{"_id":"ScWa"}],"external_id":{"pmid":["36930925"],"arxiv":["2211.02488"],"isi":["000946178200008"]},"oa":1,"publication_identifier":{"eissn":["1079-7114"],"issn":["0031-9007"]},"pmid":1,"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.","file":[{"success":1,"relation":"main_file","access_level":"open_access","file_size":2301864,"date_created":"2023-02-28T12:20:27Z","file_id":"12698","creator":"ggrosjea","file_name":"Main_Preprint.pdf","date_updated":"2023-02-28T12:20:27Z","checksum":"c4f2f6eea0408811f8f4898e15890355","content_type":"application/pdf"},{"file_id":"12699","date_created":"2023-02-28T12:20:55Z","file_name":"Suppl_info.pdf","creator":"ggrosjea","file_size":1138625,"content_type":"application/pdf","checksum":"6af6ed6c97a977f923de4162294b43c4","date_updated":"2023-02-28T12:20:55Z","success":1,"relation":"main_file","access_level":"open_access"},{"success":1,"access_level":"open_access","relation":"main_file","file_name":"Suppl_vid1.mp4","creator":"ggrosjea","file_id":"12700","date_created":"2023-02-28T12:37:54Z","file_size":793449,"content_type":"video/mp4","checksum":"3f20365fb9515bdba3a111d912c8d8b4","date_updated":"2023-02-28T12:37:54Z"},{"content_type":"video/mp4","checksum":"90cecacbe0e2f9dea11f91a4ba20c32e","date_updated":"2023-02-28T12:37:54Z","file_name":"Suppl_vid2.mp4","creator":"ggrosjea","file_id":"12701","date_created":"2023-02-28T12:37:54Z","file_size":455925,"access_level":"open_access","relation":"main_file","success":1}],"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2211.02488"}],"isi":1,"intvolume":"       130","ec_funded":1,"publication":"Physical Review Letters","author":[{"id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","first_name":"Galien M","full_name":"Grosjean, Galien M","last_name":"Grosjean","orcid":"0000-0001-5154-417X"},{"orcid":"0000-0002-2299-3176","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","first_name":"Scott R","last_name":"Waitukaitis","full_name":"Waitukaitis, Scott R"}],"file_date_updated":"2023-02-28T12:37:54Z","keyword":["General Physics","Electrostatics","Triboelectricity","Soft Matter","Acoustic Levitation","Granular Materials"],"scopus_import":"1"},{"date_created":"2023-07-07T12:48:01Z","external_id":{"isi":["001019565900002"],"arxiv":["2304.12861"]},"department":[{"_id":"ScWa"}],"language":[{"iso":"eng"}],"corr_author":"1","publication_status":"published","article_number":"065601","abstract":[{"lang":"eng","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."}],"volume":7,"quality_controlled":"1","file_date_updated":"2023-07-07T12:49:51Z","publication":"Physical Review Materials","keyword":["Physics and Astronomy (miscellaneous)","General Materials Science"],"author":[{"orcid":"0000-0001-5154-417X","last_name":"Grosjean","full_name":"Grosjean, Galien M","first_name":"Galien M","id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425"},{"full_name":"Waitukaitis, Scott R","last_name":"Waitukaitis","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","first_name":"Scott R","orcid":"0000-0002-2299-3176"}],"scopus_import":"1","isi":1,"intvolume":"         7","ec_funded":1,"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. ","file":[{"success":1,"access_level":"open_access","relation":"main_file","file_size":1127040,"file_name":"Mosaic_asymmetries.pdf","creator":"ggrosjea","file_id":"13198","date_created":"2023-07-07T12:49:51Z","date_updated":"2023-07-07T12:49:51Z","content_type":"application/pdf","checksum":"75584730d9cdd50eeccb4c52c509776d"}],"publication_identifier":{"issn":["2475-9953"]},"oa":1,"article_type":"original","doi":"10.1103/physrevmaterials.7.065601","ddc":["537"],"arxiv":1,"article_processing_charge":"No","citation":{"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>","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>","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>.","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>.","short":"G.M. Grosjean, S.R. Waitukaitis, Physical Review Materials 7 (2023).","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."},"_id":"13197","month":"06","title":"Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","project":[{"_id":"0aa60e99-070f-11eb-9043-a6de6bdc3afa","grant_number":"949120","name":"Tribocharge: a multi-scale approach to an enduring problem in physics","call_identifier":"H2020"},{"grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"ISTplus - Postdoctoral Fellowships"}],"has_accepted_license":"1","date_published":"2023-06-13T00:00:00Z","date_updated":"2025-04-14T07:43:55Z","oa_version":"Submitted Version","year":"2023","issue":"6","day":"13","publisher":"American Physical Society","type":"journal_article","status":"public"},{"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.","file":[{"file_size":2507870,"file_id":"9422","date_created":"2021-05-25T11:32:14Z","creator":"kschuh","file_name":"2021_EPJE_Sukhov.pdf","date_updated":"2021-05-25T11:32:14Z","content_type":"application/pdf","checksum":"0ef342d011afbe3c5cb058fda9a3f395","success":1,"relation":"main_file","access_level":"open_access"}],"publication_identifier":{"eissn":["1292-895X"],"issn":["1292-8941"]},"oa":1,"scopus_import":"1","author":[{"first_name":"Alexander","full_name":"Sukhov, Alexander","last_name":"Sukhov"},{"first_name":"Maxime","full_name":"Hubert, Maxime","last_name":"Hubert"},{"full_name":"Grosjean, Galien M","last_name":"Grosjean","first_name":"Galien M","id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","orcid":"0000-0001-5154-417X"},{"full_name":"Trosman, Oleg","last_name":"Trosman","first_name":"Oleg"},{"first_name":"Sebastian","full_name":"Ziegler, Sebastian","last_name":"Ziegler"},{"first_name":"Ylona","full_name":"Collard, Ylona","last_name":"Collard"},{"first_name":"Nicolas","full_name":"Vandewalle, Nicolas","last_name":"Vandewalle"},{"first_name":"Ana Sunčana","last_name":"Smith","full_name":"Smith, Ana Sunčana"},{"first_name":"Jens","full_name":"Harting, Jens","last_name":"Harting"}],"file_date_updated":"2021-05-25T11:32:14Z","publication":"European Physical Journal E","isi":1,"intvolume":"        44","volume":44,"quality_controlled":"1","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"}],"article_number":"59","publication_status":"published","external_id":{"isi":["000643251300001"]},"department":[{"_id":"ScWa"}],"date_created":"2021-05-23T22:01:44Z","language":[{"iso":"eng"}],"status":"public","tmp":{"short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"day":"24","publisher":"Springer","type":"journal_article","issue":"4","has_accepted_license":"1","date_published":"2021-04-24T00:00:00Z","year":"2021","oa_version":"Published Version","date_updated":"2025-07-10T12:01:45Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","_id":"9411","title":"Regimes of motion of magnetocapillary swimmers","month":"04","article_processing_charge":"No","citation":{"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).","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.","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>","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>","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>.","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."},"ddc":["530"],"doi":"10.1140/epje/s10189-021-00065-2"},{"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","oa_version":"Published Version","year":"2020","date_updated":"2025-04-23T08:51:12Z","project":[{"_id":"260C2330-B435-11E9-9278-68D0E5697425","grant_number":"754411","call_identifier":"H2020","name":"ISTplus - Postdoctoral Fellowships"}],"has_accepted_license":"1","date_published":"2020-08-17T00:00:00Z","type":"journal_article","day":"17","publisher":"American Physical Society","issue":"8","tmp":{"short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"status":"public","doi":"10.1103/PhysRevMaterials.4.082602","article_type":"original","arxiv":1,"ddc":["530"],"citation":{"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.","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>.","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>","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>","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.","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>."},"related_material":{"record":[{"id":"12697","status":"public","relation":"popular_science"}]},"article_processing_charge":"Yes","title":"Quantitatively consistent scale-spanning model for same-material tribocharging","month":"08","_id":"8101","ec_funded":1,"isi":1,"intvolume":"         4","scopus_import":"1","keyword":["electric charge","tribocharging","soft matter","granular materials","polymers"],"author":[{"id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","first_name":"Galien M","last_name":"Grosjean","full_name":"Grosjean, Galien M","orcid":"0000-0001-5154-417X"},{"first_name":"Sebastian","id":"133F200A-B015-11E9-AD41-0EDAE5697425","full_name":"Wald, Sebastian","last_name":"Wald","orcid":"0000-0002-5869-1604"},{"id":"4B807D68-AE37-11E9-AC72-31CAE5697425","first_name":"Juan Carlos A","last_name":"Sobarzo Ponce","full_name":"Sobarzo Ponce, Juan Carlos A"},{"last_name":"Waitukaitis","full_name":"Waitukaitis, Scott R","first_name":"Scott R","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2299-3176"}],"publication":"Physical Review Materials","file_date_updated":"2020-08-17T15:54:20Z","publication_identifier":{"issn":["2475-9953"]},"oa":1,"file":[{"date_updated":"2020-08-17T15:54:20Z","checksum":"288fef1eeb6540c6344bb8f7c8159dc9","content_type":"application/pdf","file_size":853753,"file_id":"8277","date_created":"2020-08-17T15:54:20Z","file_name":"Grosjean2020.pdf","creator":"ggrosjea","relation":"main_file","access_level":"open_access","success":1}],"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.","language":[{"iso":"eng"}],"corr_author":"1","department":[{"_id":"ScWa"}],"external_id":{"arxiv":["2006.07120"],"isi":["000561897000001"]},"date_created":"2020-07-07T11:33:54Z","publication_status":"published","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."}],"article_number":"082602","quality_controlled":"1","volume":4},{"publisher":"Springer Nature","type":"journal_article","day":"19","status":"public","tmp":{"short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","project":[{"name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425"}],"has_accepted_license":"1","date_published":"2020-06-19T00:00:00Z","year":"2020","oa_version":"Published Version","date_updated":"2026-04-02T14:34:21Z","article_processing_charge":"No","citation":{"short":"Y. Collard, G.M. Grosjean, N. Vandewalle, Communications Physics 3 (2020).","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.","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>","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>","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>.","ista":"Collard Y, Grosjean GM, Vandewalle N. 2020. Magnetically powered metachronal waves induce locomotion in self-assemblies. Communications Physics. 3, 112."},"_id":"8036","title":"Magnetically powered metachronal waves induce locomotion in self-assemblies","month":"06","doi":"10.1038/s42005-020-0380-9","article_type":"original","ddc":["530"],"file":[{"date_updated":"2020-07-14T12:48:08Z","checksum":"ed984f7a393f19140b5279a54a3336ad","content_type":"application/pdf","file_size":1907821,"date_created":"2020-06-29T13:21:24Z","file_id":"8045","file_name":"2020_CommunicationsPhysics_Collard.pdf","creator":"cziletti","relation":"main_file","access_level":"open_access"}],"publication_identifier":{"eissn":["2399-3650"]},"oa":1,"scopus_import":"1","publication":"Communications Physics","file_date_updated":"2020-07-14T12:48:08Z","author":[{"last_name":"Collard","full_name":"Collard, Ylona","first_name":"Ylona"},{"orcid":"0000-0001-5154-417X","first_name":"Galien M","id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","last_name":"Grosjean","full_name":"Grosjean, Galien M"},{"first_name":"Nicolas","full_name":"Vandewalle, Nicolas","last_name":"Vandewalle"}],"ec_funded":1,"isi":1,"intvolume":"         3","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."}],"article_number":"112","volume":3,"quality_controlled":"1","department":[{"_id":"ScWa"}],"external_id":{"isi":["000543328000002"]},"date_created":"2020-06-29T07:59:35Z","language":[{"iso":"eng"}],"publication_status":"published"}]