---
OA_place: publisher
OA_type: hybrid
PlanS_conform: '1'
_id: '21485'
abstract:
- lang: eng
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.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
- _id: ScienComp
- _id: LifeSc
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).
article_processing_charge: Yes (via OA deal)
article_type: original
author:
- first_name: Galien M
full_name: Grosjean, Galien M
id: 0C5FDA4A-9CF6-11E9-8939-FF05E6697425
last_name: Grosjean
orcid: 0000-0001-5154-417X
- first_name: Markus
full_name: Ostermann, Markus
last_name: Ostermann
- first_name: Markus
full_name: Sauer, Markus
last_name: Sauer
- first_name: Michael
full_name: Hahn, Michael
last_name: Hahn
- first_name: Christian M.
full_name: Pichler, Christian M.
last_name: Pichler
- first_name: Florian
full_name: Fahrnberger, Florian
last_name: Fahrnberger
- first_name: Felix
full_name: Pertl, Felix
id: 6313aec0-15b2-11ec-abd3-ed67d16139af
last_name: Pertl
orcid: 0000-0003-0463-5794
- first_name: Daniel
full_name: Balazs, Daniel
id: 302BADF6-85FC-11EA-9E3B-B9493DDC885E
last_name: Balazs
orcid: 0000-0001-7597-043X
- first_name: Mason M.
full_name: Link, Mason M.
last_name: Link
- first_name: Seong H.
full_name: Kim, Seong H.
last_name: Kim
- first_name: Devin L.
full_name: Schrader, Devin L.
last_name: Schrader
- first_name: Adriana
full_name: Blanco, Adriana
last_name: Blanco
- first_name: Francisco
full_name: Gracia, Francisco
last_name: Gracia
- first_name: Nicolás
full_name: Mujica, Nicolás
last_name: Mujica
- first_name: Scott R
full_name: Waitukaitis, Scott R
id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87
last_name: Waitukaitis
orcid: 0000-0002-2299-3176
citation:
ama: Grosjean GM, Ostermann M, Sauer M, et al. Adventitious carbon breaks symmetry
in oxide contact electrification. Nature. 2026;651(8106):626-631. doi:10.1038/s41586-025-10088-w
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. Nature. Springer Nature. https://doi.org/10.1038/s41586-025-10088-w
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.” Nature. Springer Nature, 2026.
https://doi.org/10.1038/s41586-025-10088-w.
ieee: G. M. Grosjean et al., “Adventitious carbon breaks symmetry in oxide
contact electrification,” Nature, vol. 651, no. 8106. Springer Nature,
pp. 626–631, 2026.
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.
mla: Grosjean, Galien M., et al. “Adventitious Carbon Breaks Symmetry in Oxide Contact
Electrification.” Nature, vol. 651, no. 8106, Springer Nature, 2026, pp.
626–31, doi:10.1038/s41586-025-10088-w.
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.
corr_author: '1'
date_created: 2026-03-23T15:04:00Z
date_published: 2026-03-18T00:00:00Z
date_updated: 2026-04-28T12:06:01Z
day: '18'
ddc:
- '540'
department:
- _id: ScWa
- _id: GradSch
- _id: LifeSc
doi: 10.1038/s41586-025-10088-w
ec_funded: 1
external_id:
pmid:
- '41851325'
file:
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has_accepted_license: '1'
intvolume: ' 651'
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oa: 1
oa_version: Published Version
page: 626-631
pmid: 1
project:
- _id: 0aa60e99-070f-11eb-9043-a6de6bdc3afa
call_identifier: H2020
grant_number: '949120'
name: 'Tribocharge: a multi-scale approach to an enduring problem in physics'
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
publication: Nature
publication_identifier:
eissn:
- 1476-4687
issn:
- 0028-0836
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
link:
- description: News on ISTA website
relation: press_release
url: https://ista.ac.at/en/news/colliding-dust-and-the-sparks-of-creation/
status: public
title: Adventitious carbon breaks symmetry in oxide contact electrification
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 651
year: '2026'
...
---
OA_place: publisher
OA_type: hybrid
_id: '20727'
abstract:
- lang: eng
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.
acknowledged_ssus:
- _id: M-Shop
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.
article_processing_charge: Yes (in subscription journal)
article_type: original
arxiv: 1
author:
- first_name: Sue
full_name: Shi, Sue
id: 5c5b9247-15b2-11ec-abd3-fd958715639c
last_name: Shi
- first_name: Maximilian
full_name: Hübl, Maximilian
id: 5eb8629e-15b2-11ec-abd3-e6f3e5e01f32
last_name: Hübl
- first_name: Galien M
full_name: Grosjean, Galien M
id: 0C5FDA4A-9CF6-11E9-8939-FF05E6697425
last_name: Grosjean
orcid: 0000-0001-5154-417X
- first_name: Carl Peter
full_name: Goodrich, Carl Peter
id: EB352CD2-F68A-11E9-89C5-A432E6697425
last_name: Goodrich
orcid: 0000-0002-1307-5074
- first_name: Scott R
full_name: Waitukaitis, Scott R
id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87
last_name: Waitukaitis
orcid: 0000-0002-2299-3176
citation:
ama: Shi S, Hübl M, Grosjean GM, Goodrich CP, Waitukaitis SR. Electrostatics overcome
acoustic collapse to assemble, adapt, and activate levitated matter. Proceedings
of the National Academy of Sciences. 2025;122(50):e2516865122. doi:10.1073/pnas.2516865122
apa: Shi, S., Hübl, M., Grosjean, G. M., Goodrich, C. P., & Waitukaitis, S.
R. (2025). Electrostatics overcome acoustic collapse to assemble, adapt, and activate
levitated matter. Proceedings of the National Academy of Sciences. National
Academy of Sciences. https://doi.org/10.1073/pnas.2516865122
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.” Proceedings of the National Academy of Sciences.
National Academy of Sciences, 2025. https://doi.org/10.1073/pnas.2516865122.
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,”
Proceedings of the National Academy of Sciences, vol. 122, no. 50. National
Academy of Sciences, p. e2516865122, 2025.
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.
mla: Shi, Sue, et al. “Electrostatics Overcome Acoustic Collapse to Assemble, Adapt,
and Activate Levitated Matter.” Proceedings of the National Academy of Sciences,
vol. 122, no. 50, National Academy of Sciences, 2025, p. e2516865122, doi:10.1073/pnas.2516865122.
short: S. Shi, M. Hübl, G.M. Grosjean, C.P. Goodrich, S.R. Waitukaitis, Proceedings
of the National Academy of Sciences 122 (2025) e2516865122.
corr_author: '1'
date_created: 2025-12-07T23:02:00Z
date_published: 2025-12-16T00:00:00Z
date_updated: 2026-04-28T13:00:10Z
day: '16'
ddc:
- '530'
department:
- _id: ScWa
- _id: CaGo
doi: 10.1073/pnas.2516865122
external_id:
arxiv:
- '2507.01739'
file:
- access_level: open_access
checksum: c40dc4c909724b9d1146636612e8821a
content_type: application/pdf
creator: dernst
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date_updated: 2025-12-09T12:45:53Z
file_id: '20744'
file_name: 2025_PNAS_Shi.pdf
file_size: 10621381
relation: main_file
success: 1
file_date_updated: 2025-12-09T12:45:53Z
has_accepted_license: '1'
intvolume: ' 122'
issue: '50'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
page: e2516865122
project:
- _id: 8dd93da8-16d5-11f0-9cad-d2c70200d9a5
grant_number: FTI23-G-011
name: Dynamically reconfigurable self-assembly with triangular DNA-origami bricks
publication: Proceedings of the National Academy of Sciences
publication_identifier:
eissn:
- 1091-6490
publication_status: published
publisher: National Academy of Sciences
quality_controlled: '1'
related_material:
link:
- description: News on ISTA website
relation: press_release
url: https://ista.ac.at/en/news/science-is-like-magic-just-real/
record:
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relation: research_data
status: public
scopus_import: '1'
status: public
title: Electrostatics overcome acoustic collapse to assemble, adapt, and activate
levitated matter
tmp:
image: /images/cc_by_nc_nd.png
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)
short: CC BY-NC-ND (4.0)
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 122
year: '2025'
...
---
_id: '12697'
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.
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."
article_number: '098202'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Galien M
full_name: Grosjean, Galien M
id: 0C5FDA4A-9CF6-11E9-8939-FF05E6697425
last_name: Grosjean
orcid: 0000-0001-5154-417X
- first_name: Scott R
full_name: Waitukaitis, Scott R
id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87
last_name: Waitukaitis
orcid: 0000-0002-2299-3176
citation:
ama: Grosjean GM, Waitukaitis SR. Single-collision statistics reveal a global mechanism
driven by sample history for contact electrification in granular media. Physical
Review Letters. 2023;130(9). doi:10.1103/physrevlett.130.098202
apa: Grosjean, G. M., & Waitukaitis, S. R. (2023). Single-collision statistics
reveal a global mechanism driven by sample history for contact electrification
in granular media. Physical Review Letters. American Physical Society.
https://doi.org/10.1103/physrevlett.130.098202
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.” Physical Review Letters. American Physical Society,
2023. https://doi.org/10.1103/physrevlett.130.098202.
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,” Physical Review Letters, 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.
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.” Physical Review Letters, vol. 130, no. 9, 098202, American
Physical Society, 2023, doi:10.1103/physrevlett.130.098202.
short: G.M. Grosjean, S.R. Waitukaitis, Physical Review Letters 130 (2023).
corr_author: '1'
date_created: 2023-02-28T12:14:46Z
date_published: 2023-03-03T00:00:00Z
date_updated: 2025-04-23T08:51:13Z
day: '03'
ddc:
- '530'
- '537'
department:
- _id: ScWa
doi: 10.1103/physrevlett.130.098202
ec_funded: 1
external_id:
arxiv:
- '2211.02488'
isi:
- '000946178200008'
pmid:
- '36930925'
file:
- access_level: open_access
checksum: c4f2f6eea0408811f8f4898e15890355
content_type: application/pdf
creator: ggrosjea
date_created: 2023-02-28T12:20:27Z
date_updated: 2023-02-28T12:20:27Z
file_id: '12698'
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file_size: 793449
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content_type: video/mp4
creator: ggrosjea
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file_name: Suppl_vid2.mp4
file_size: 455925
relation: main_file
success: 1
file_date_updated: 2023-02-28T12:37:54Z
has_accepted_license: '1'
intvolume: ' 130'
isi: 1
issue: '9'
keyword:
- General Physics
- Electrostatics
- Triboelectricity
- Soft Matter
- Acoustic Levitation
- Granular Materials
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2211.02488
month: '03'
oa: 1
oa_version: Preprint
pmid: 1
project:
- _id: 0aa60e99-070f-11eb-9043-a6de6bdc3afa
call_identifier: H2020
grant_number: '949120'
name: 'Tribocharge: a multi-scale approach to an enduring problem in physics'
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
publication: Physical Review Letters
publication_identifier:
eissn:
- 1079-7114
issn:
- 0031-9007
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
record:
- id: '8101'
relation: research_paper
status: public
scopus_import: '1'
status: public
title: Single-collision statistics reveal a global mechanism driven by sample history
for contact electrification in granular media
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 130
year: '2023'
...
---
_id: '13197'
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."
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. "
article_number: '065601'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Galien M
full_name: Grosjean, Galien M
id: 0C5FDA4A-9CF6-11E9-8939-FF05E6697425
last_name: Grosjean
orcid: 0000-0001-5154-417X
- first_name: Scott R
full_name: Waitukaitis, Scott R
id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87
last_name: Waitukaitis
orcid: 0000-0002-2299-3176
citation:
ama: 'Grosjean GM, Waitukaitis SR. Asymmetries in triboelectric charging: Generalizing
mosaic models to different-material samples and sliding contacts. Physical
Review Materials. 2023;7(6). doi:10.1103/physrevmaterials.7.065601'
apa: 'Grosjean, G. M., & Waitukaitis, S. R. (2023). Asymmetries in triboelectric
charging: Generalizing mosaic models to different-material samples and sliding
contacts. Physical Review Materials. American Physical Society. https://doi.org/10.1103/physrevmaterials.7.065601'
chicago: 'Grosjean, Galien M, and Scott R Waitukaitis. “Asymmetries in Triboelectric
Charging: Generalizing Mosaic Models to Different-Material Samples and Sliding
Contacts.” Physical Review Materials. American Physical Society, 2023.
https://doi.org/10.1103/physrevmaterials.7.065601.'
ieee: 'G. M. Grosjean and S. R. Waitukaitis, “Asymmetries in triboelectric charging:
Generalizing mosaic models to different-material samples and sliding contacts,”
Physical Review Materials, vol. 7, no. 6. American Physical Society, 2023.'
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.” Physical Review Materials, vol. 7, no. 6, 065601, American Physical
Society, 2023, doi:10.1103/physrevmaterials.7.065601.'
short: G.M. Grosjean, S.R. Waitukaitis, Physical Review Materials 7 (2023).
corr_author: '1'
date_created: 2023-07-07T12:48:01Z
date_published: 2023-06-13T00:00:00Z
date_updated: 2025-04-14T07:43:55Z
day: '13'
ddc:
- '537'
department:
- _id: ScWa
doi: 10.1103/physrevmaterials.7.065601
ec_funded: 1
external_id:
arxiv:
- '2304.12861'
isi:
- '001019565900002'
file:
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checksum: 75584730d9cdd50eeccb4c52c509776d
content_type: application/pdf
creator: ggrosjea
date_created: 2023-07-07T12:49:51Z
date_updated: 2023-07-07T12:49:51Z
file_id: '13198'
file_name: Mosaic_asymmetries.pdf
file_size: 1127040
relation: main_file
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file_date_updated: 2023-07-07T12:49:51Z
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intvolume: ' 7'
isi: 1
issue: '6'
keyword:
- Physics and Astronomy (miscellaneous)
- General Materials Science
language:
- iso: eng
month: '06'
oa: 1
oa_version: Submitted Version
project:
- _id: 0aa60e99-070f-11eb-9043-a6de6bdc3afa
call_identifier: H2020
grant_number: '949120'
name: 'Tribocharge: a multi-scale approach to an enduring problem in physics'
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
publication: Physical Review Materials
publication_identifier:
issn:
- 2475-9953
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Asymmetries in triboelectric charging: Generalizing mosaic models to different-material
samples and sliding contacts'
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 7
year: '2023'
...
---
_id: '9411'
abstract:
- lang: eng
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.
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.
article_number: '59'
article_processing_charge: No
author:
- first_name: Alexander
full_name: Sukhov, Alexander
last_name: Sukhov
- first_name: Maxime
full_name: Hubert, Maxime
last_name: Hubert
- first_name: Galien M
full_name: Grosjean, Galien M
id: 0C5FDA4A-9CF6-11E9-8939-FF05E6697425
last_name: Grosjean
orcid: 0000-0001-5154-417X
- first_name: Oleg
full_name: Trosman, Oleg
last_name: Trosman
- 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
full_name: Smith, Ana Sunčana
last_name: Smith
- first_name: Jens
full_name: Harting, Jens
last_name: Harting
citation:
ama: Sukhov A, Hubert M, Grosjean GM, et al. Regimes of motion of magnetocapillary
swimmers. European Physical Journal E. 2021;44(4). doi:10.1140/epje/s10189-021-00065-2
apa: Sukhov, A., Hubert, M., Grosjean, G. M., Trosman, O., Ziegler, S., Collard,
Y., … Harting, J. (2021). Regimes of motion of magnetocapillary swimmers. European
Physical Journal E. Springer. https://doi.org/10.1140/epje/s10189-021-00065-2
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.” European Physical Journal
E. Springer, 2021. https://doi.org/10.1140/epje/s10189-021-00065-2.
ieee: A. Sukhov et al., “Regimes of motion of magnetocapillary swimmers,”
European Physical Journal E, vol. 44, no. 4. Springer, 2021.
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.
mla: Sukhov, Alexander, et al. “Regimes of Motion of Magnetocapillary Swimmers.”
European Physical Journal E, vol. 44, no. 4, 59, Springer, 2021, doi:10.1140/epje/s10189-021-00065-2.
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).
date_created: 2021-05-23T22:01:44Z
date_published: 2021-04-24T00:00:00Z
date_updated: 2025-07-10T12:01:45Z
day: '24'
ddc:
- '530'
department:
- _id: ScWa
doi: 10.1140/epje/s10189-021-00065-2
external_id:
isi:
- '000643251300001'
file:
- access_level: open_access
checksum: 0ef342d011afbe3c5cb058fda9a3f395
content_type: application/pdf
creator: kschuh
date_created: 2021-05-25T11:32:14Z
date_updated: 2021-05-25T11:32:14Z
file_id: '9422'
file_name: 2021_EPJE_Sukhov.pdf
file_size: 2507870
relation: main_file
success: 1
file_date_updated: 2021-05-25T11:32:14Z
has_accepted_license: '1'
intvolume: ' 44'
isi: 1
issue: '4'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
publication: European Physical Journal E
publication_identifier:
eissn:
- 1292-895X
issn:
- 1292-8941
publication_status: published
publisher: Springer
quality_controlled: '1'
scopus_import: '1'
status: public
title: Regimes of motion of magnetocapillary swimmers
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 44
year: '2021'
...
---
_id: '8101'
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.
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."
article_number: '082602'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Galien M
full_name: Grosjean, Galien M
id: 0C5FDA4A-9CF6-11E9-8939-FF05E6697425
last_name: Grosjean
orcid: 0000-0001-5154-417X
- first_name: Sebastian
full_name: Wald, Sebastian
id: 133F200A-B015-11E9-AD41-0EDAE5697425
last_name: Wald
orcid: 0000-0002-5869-1604
- first_name: Juan Carlos A
full_name: Sobarzo Ponce, Juan Carlos A
id: 4B807D68-AE37-11E9-AC72-31CAE5697425
last_name: Sobarzo Ponce
- first_name: Scott R
full_name: Waitukaitis, Scott R
id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87
last_name: Waitukaitis
orcid: 0000-0002-2299-3176
citation:
ama: Grosjean GM, Wald S, Sobarzo Ponce JCA, Waitukaitis SR. Quantitatively consistent
scale-spanning model for same-material tribocharging. Physical Review Materials.
2020;4(8). doi:10.1103/PhysRevMaterials.4.082602
apa: Grosjean, G. M., Wald, S., Sobarzo Ponce, J. C. A., & Waitukaitis, S. R.
(2020). Quantitatively consistent scale-spanning model for same-material tribocharging.
Physical Review Materials. American Physical Society. https://doi.org/10.1103/PhysRevMaterials.4.082602
chicago: Grosjean, Galien M, Sebastian Wald, Juan Carlos A Sobarzo Ponce, and Scott
R Waitukaitis. “Quantitatively Consistent Scale-Spanning Model for Same-Material
Tribocharging.” Physical Review Materials. American Physical Society, 2020.
https://doi.org/10.1103/PhysRevMaterials.4.082602.
ieee: G. M. Grosjean, S. Wald, J. C. A. Sobarzo Ponce, and S. R. Waitukaitis, “Quantitatively
consistent scale-spanning model for same-material tribocharging,” Physical
Review Materials, vol. 4, no. 8. American Physical Society, 2020.
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.
mla: Grosjean, Galien M., et al. “Quantitatively Consistent Scale-Spanning Model
for Same-Material Tribocharging.” Physical Review Materials, vol. 4, no.
8, 082602, American Physical Society, 2020, doi:10.1103/PhysRevMaterials.4.082602.
short: G.M. Grosjean, S. Wald, J.C.A. Sobarzo Ponce, S.R. Waitukaitis, Physical
Review Materials 4 (2020).
corr_author: '1'
date_created: 2020-07-07T11:33:54Z
date_published: 2020-08-17T00:00:00Z
date_updated: 2025-04-23T08:51:12Z
day: '17'
ddc:
- '530'
department:
- _id: ScWa
doi: 10.1103/PhysRevMaterials.4.082602
ec_funded: 1
external_id:
arxiv:
- '2006.07120'
isi:
- '000561897000001'
file:
- access_level: open_access
checksum: 288fef1eeb6540c6344bb8f7c8159dc9
content_type: application/pdf
creator: ggrosjea
date_created: 2020-08-17T15:54:20Z
date_updated: 2020-08-17T15:54:20Z
file_id: '8277'
file_name: Grosjean2020.pdf
file_size: 853753
relation: main_file
success: 1
file_date_updated: 2020-08-17T15:54:20Z
has_accepted_license: '1'
intvolume: ' 4'
isi: 1
issue: '8'
keyword:
- electric charge
- tribocharging
- soft matter
- granular materials
- polymers
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
publication: Physical Review Materials
publication_identifier:
issn:
- 2475-9953
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
record:
- id: '12697'
relation: popular_science
status: public
scopus_import: '1'
status: public
title: Quantitatively consistent scale-spanning model for same-material tribocharging
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 4
year: '2020'
...
---
_id: '8036'
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'
article_processing_charge: No
article_type: original
author:
- first_name: Ylona
full_name: Collard, Ylona
last_name: Collard
- first_name: Galien M
full_name: Grosjean, Galien M
id: 0C5FDA4A-9CF6-11E9-8939-FF05E6697425
last_name: Grosjean
orcid: 0000-0001-5154-417X
- first_name: Nicolas
full_name: Vandewalle, Nicolas
last_name: Vandewalle
citation:
ama: Collard Y, Grosjean GM, Vandewalle N. Magnetically powered metachronal waves
induce locomotion in self-assemblies. Communications Physics. 2020;3. doi:10.1038/s42005-020-0380-9
apa: Collard, Y., Grosjean, G. M., & Vandewalle, N. (2020). Magnetically powered
metachronal waves induce locomotion in self-assemblies. Communications Physics.
Springer Nature. https://doi.org/10.1038/s42005-020-0380-9
chicago: Collard, Ylona, Galien M Grosjean, and Nicolas Vandewalle. “Magnetically
Powered Metachronal Waves Induce Locomotion in Self-Assemblies.” Communications
Physics. Springer Nature, 2020. https://doi.org/10.1038/s42005-020-0380-9.
ieee: Y. Collard, G. M. Grosjean, and N. Vandewalle, “Magnetically powered metachronal
waves induce locomotion in self-assemblies,” Communications Physics, vol.
3. Springer Nature, 2020.
ista: Collard Y, Grosjean GM, Vandewalle N. 2020. Magnetically powered metachronal
waves induce locomotion in self-assemblies. Communications Physics. 3, 112.
mla: Collard, Ylona, et al. “Magnetically Powered Metachronal Waves Induce Locomotion
in Self-Assemblies.” Communications Physics, vol. 3, 112, Springer Nature,
2020, doi:10.1038/s42005-020-0380-9.
short: Y. Collard, G.M. Grosjean, N. Vandewalle, Communications Physics 3 (2020).
date_created: 2020-06-29T07:59:35Z
date_published: 2020-06-19T00:00:00Z
date_updated: 2026-04-02T14:34:21Z
day: '19'
ddc:
- '530'
department:
- _id: ScWa
doi: 10.1038/s42005-020-0380-9
ec_funded: 1
external_id:
isi:
- '000543328000002'
file:
- access_level: open_access
checksum: ed984f7a393f19140b5279a54a3336ad
content_type: application/pdf
creator: cziletti
date_created: 2020-06-29T13:21:24Z
date_updated: 2020-07-14T12:48:08Z
file_id: '8045'
file_name: 2020_CommunicationsPhysics_Collard.pdf
file_size: 1907821
relation: main_file
file_date_updated: 2020-07-14T12:48:08Z
has_accepted_license: '1'
intvolume: ' 3'
isi: 1
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
publication: Communications Physics
publication_identifier:
eissn:
- 2399-3650
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Magnetically powered metachronal waves induce locomotion in self-assemblies
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 3
year: '2020'
...