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Journal article
Sculpting crystals one Burgers vector at a time: Toward colloidal lattice robot swarms
Proceedings of the National Academy of Sciences - PNAS, v 118(3), 2017377118
19 Jan 2021
PMID: 33431683
Abstract
Plastic deformation of crystalline materials with isotropic particle attractions proceeds by the creation and migration of dislocations under the influence of external forces. If dislocations are produced and migrated under the action of local forces, then material shape change can occur without the application of surface forces. We investigate how particles with variable diameters can be embedded in colloidal monolayers to produce dislocations on demand. We find in simulation that when embedded clusters of variable diameter particles are taken through multiple cycles of swelling and shrinking, large cumulative plastic slip is produced by the creation and biased motion of dislocation pairs in the solid for embedded clusters of particular geometries. In this way, dislocations emitted by these clusters (biased "dislocation emitters") can be used to reshape colloidal matter. Our results are also applicable to larger-scale swarms of robotic particles that organize into dense ordered two-dimensional (2D) arrangements. We conclude with a discussion of how dislocations fulfill for colloids the role sought by "metamodules" in lattice robotics research and show how successive applications of shear as a unit operation can produce shape change through slicing and swirling.
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Details
- Title
- Sculpting crystals one Burgers vector at a time: Toward colloidal lattice robot swarms
- Creators
- Bryan VanSaders - University of MichiganSharon C. Glotzer - University of MichiganNorthwestern Univ., Evanston, IL (United States)
- Publication Details
- Proceedings of the National Academy of Sciences - PNAS, v 118(3), 2017377118
- Publisher
- Natl Acad Sciences
- Number of pages
- 10
- Grant note
- University of Michigan; University of Michigan System ACI-1053575; 140129 / NSF (XSEDE Award) DE-SC0000989 / Center for Bio-Inspired Energy Science, an Energy Frontier Research Center - US Department of Energy, Office of Science, Basic Energy Sciences; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000609633900045
- Scopus ID
- 2-s2.0-85099167489
- Other Identifier
- 991021879787604721
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Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Multidisciplinary Sciences