Journal
SOFT MATTER
Volume 12, Issue 20, Pages 4584-4589Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5sm03127c
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Funding
- Materials Research Science and Engineering Center (MRSEC) program of the National Science Foundation [DMR-1420073]
- Fulbright Scholarship Lloyds of London Award
- JSPS Postdoctoral Fellowships for Research Abroad
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Biological systems often involve the self-assembly of basic components into complex and functioning structures. Artificial systems that mimic such processes can provide a well-controlled setting to explore the principles involved and also synthesize useful micromachines. Our experiments show that immotile, but active, components self-assemble into two types of structure that exhibit the fundamental forms of motility: translation and rotation. Specifically, micron-scale metallic rods are designed to induce extensile surface flows in the presence of a chemical fuel; these rods interact with each other and pair up to form either a swimmer or a rotor. Such pairs can transition reversibly between these two configurations, leading to kinetics reminiscent of bacterial run-and-tumble motion.
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