Journal article
Mechanical properties of colloidal crystals at fluid interfaces
- Abstract:
- We characterise the local mechanical properties of two-dimensional colloidal crystals with hexagonal symmetry assembled at the flat interface between oil and water. Our experiments elucidate the conditions under which the material behaves isotropically, as opposed to those where the microstructure plays a major role. Brownian fluctuations are used to extract the stiffness of the lattice under the continuum approximation, whereas at larger displacements, obtained by optically driving one particle through the structure, the mechanical resistance of the lattice depends on both the area fraction and the direction of the applied force. Remarkably, the minimum resistance does not necessarily correspond to a probe being driven between neighbours, i.e. at 30° with respect to the crystal axes.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, 1.0MB, Terms of use)
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- Publisher copy:
- 10.1088/2515-7639/abd019
Authors
- Publisher:
- IOP Publishing
- Journal:
- Journal of Physics: Materials More from this journal
- Volume:
- 4
- Issue:
- 2
- Article number:
- 025001
- Publication date:
- 2021-01-12
- Acceptance date:
- 2020-12-02
- DOI:
- EISSN:
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2515-7639
- Language:
-
English
- Keywords:
- Pubs id:
-
1163516
- Local pid:
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pubs:1163516
- Deposit date:
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2021-02-25
Terms of use
- Copyright holder:
- Buttinoni et al.
- Copyright date:
- 2021
- Rights statement:
- ©2021 The Authors. Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
- Licence:
- CC Attribution (CC BY)
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