---
OA_place: publisher
OA_type: hybrid
PlanS_conform: '1'
_id: '20847'
abstract:
- lang: eng
  text: "We report on an experimental active matter system with motion restricted
    to four cardinal directions. Our particles are magnetite-doped colloidal spheres
    driven by the Quincke electrorotational instability. The absence of a magnetic
    field (|\U0001D469|=0) leads to circular trajectories interspersed with short
    spontaneous runs. Intermediate fields (|\U0001D469|≲20mT) linearize the motion
    along the axis perpendicular to \U0001D469. At high magnetic fields, we observe
    the surprising emergence of a second, distinct linearization along the axis parallel
    to \U0001D469. With numerical simulations, we show that this behavior can be explained
    by anisotropic magnetic susceptibility."
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
- _id: ScienComp
- _id: LifeSc
acknowledgement: "This research was funded in whole or in part by the Austrian Science
  Fund (FWF) [Grant DOI: 10.55776/ESP298]. This project has received funding from
  the European Research Council (ERC) under the European Union’s Horizon 2020 research
  and innovation programme (Grant\r\nAgreement 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. We wish to acknowledge
  the crucial contributions of Alexandre Morin in getting the project off the ground,
  and Jack Merrin for creating the SU-8 deposition protocol used in the construction
  of our\r\ncells. We also wish to thank Kimberley Modic and Hamza Nasir for their
  work on single-particle characterization. "
article_number: '065418'
article_processing_charge: Yes (via OA deal)
article_type: original
arxiv: 1
author:
- first_name: Eavan
  full_name: Fitzgerald, Eavan
  id: 2df8ab8f-080d-11ed-979a-bfe651ca3afa
  last_name: Fitzgerald
- first_name: Cécile
  full_name: Clavaud, Cécile
  id: 5f654c5d-04a1-11eb-ab36-ba9ffec58bd8
  last_name: Clavaud
  orcid: 0000-0002-1843-3803
- first_name: Debasish
  full_name: Das, Debasish
  last_name: Das
- first_name: Isaac C
  full_name: Lenton, Isaac C
  id: a550210f-223c-11ec-8182-e2d45e817efb
  last_name: Lenton
  orcid: 0000-0002-5010-6984
- 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: 'Fitzgerald E, Clavaud C, Das D, Lenton IC, Waitukaitis SR. Rolling at right
    angles: Magnetic anisotropy enables dual-anisotropic active matter. <i>Physical
    Review E</i>. 2025;112(6). doi:<a href="https://doi.org/10.1103/1ss8-31rb">10.1103/1ss8-31rb</a>'
  apa: 'Fitzgerald, E., Clavaud, C., Das, D., Lenton, I. C., &#38; Waitukaitis, S.
    R. (2025). Rolling at right angles: Magnetic anisotropy enables dual-anisotropic
    active matter. <i>Physical Review E</i>. American Physical Society. <a href="https://doi.org/10.1103/1ss8-31rb">https://doi.org/10.1103/1ss8-31rb</a>'
  chicago: 'Fitzgerald, Eavan, Cécile Clavaud, Debasish Das, Isaac C Lenton, and Scott
    R Waitukaitis. “Rolling at Right Angles: Magnetic Anisotropy Enables Dual-Anisotropic
    Active Matter.” <i>Physical Review E</i>. American Physical Society, 2025. <a
    href="https://doi.org/10.1103/1ss8-31rb">https://doi.org/10.1103/1ss8-31rb</a>.'
  ieee: 'E. Fitzgerald, C. Clavaud, D. Das, I. C. Lenton, and S. R. Waitukaitis, “Rolling
    at right angles: Magnetic anisotropy enables dual-anisotropic active matter,”
    <i>Physical Review E</i>, vol. 112, no. 6. American Physical Society, 2025.'
  ista: 'Fitzgerald E, Clavaud C, Das D, Lenton IC, Waitukaitis SR. 2025. Rolling
    at right angles: Magnetic anisotropy enables dual-anisotropic active matter. Physical
    Review E. 112(6), 065418.'
  mla: 'Fitzgerald, Eavan, et al. “Rolling at Right Angles: Magnetic Anisotropy Enables
    Dual-Anisotropic Active Matter.” <i>Physical Review E</i>, vol. 112, no. 6, 065418,
    American Physical Society, 2025, doi:<a href="https://doi.org/10.1103/1ss8-31rb">10.1103/1ss8-31rb</a>.'
  short: E. Fitzgerald, C. Clavaud, D. Das, I.C. Lenton, S.R. Waitukaitis, Physical
    Review E 112 (2025).
corr_author: '1'
date_created: 2025-12-21T23:01:34Z
date_published: 2025-12-01T00:00:00Z
date_updated: 2025-12-29T11:19:34Z
day: '01'
ddc:
- '530'
department:
- _id: ScWa
doi: 10.1103/1ss8-31rb
ec_funded: 1
external_id:
  arxiv:
  - '2508.05643'
file:
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has_accepted_license: '1'
intvolume: '       112'
issue: '6'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
project:
- _id: bd8eede5-d553-11ed-ba76-eaded0d13485
  grant_number: E 298
  name: 'MixQUIckR: Mixing with QUIncke Rollers'
- _id: 0aa60e99-070f-11eb-9043-a6de6bdc3afa
  call_identifier: H2020
  grant_number: '949120'
  name: 'Tribocharge: a multi-scale approach to an enduring problem in physics'
publication: Physical Review E
publication_identifier:
  eissn:
  - 2470-0053
  issn:
  - 2470-0045
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Rolling at right angles: Magnetic anisotropy enables dual-anisotropic active
  matter'
tmp:
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type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 112
year: '2025'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '18606'
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."
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)."
article_number: '100038'
article_processing_charge: No
article_type: original
author:
- first_name: Cécile
  full_name: Clavaud, Cécile
  id: 5f654c5d-04a1-11eb-ab36-ba9ffec58bd8
  last_name: Clavaud
  orcid: 0000-0002-1843-3803
citation:
  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>.'
  ieee: 'C. Clavaud, “Shear thickening in dense suspensions: an experimental study,”
    <i>Science Talks</i>, vol. 3. Elsevier, 2022.'
  ista: 'Clavaud C. 2022. Shear thickening in dense suspensions: an experimental study.
    Science Talks. 3, 100038.'
  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>.'
  short: C. Clavaud, Science Talks 3 (2022).
corr_author: '1'
date_created: 2024-12-01T23:01:55Z
date_published: 2022-08-01T00:00:00Z
date_updated: 2024-12-11T09:24:57Z
day: '01'
ddc:
- '530'
department:
- _id: ScWa
doi: 10.1016/j.sctalk.2022.100038
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file_date_updated: 2024-12-11T09:22:19Z
has_accepted_license: '1'
intvolume: '         3'
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc-nd/4.0/
month: '08'
oa: 1
oa_version: Published Version
publication: Science Talks
publication_identifier:
  eissn:
  - 2772-5693
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Shear thickening in dense suspensions: an experimental study'
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type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
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...