| Bipedal nanowalker by pure physical mechanisms. | |
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MedLine Citation:
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PMID: 23368271 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Artificial nanowalkers are inspired by biomolecular counterparts from living cells, but remain far from comparable to the latter in design principles. The walkers reported to date mostly rely on chemical mechanisms to gain a direction; they all produce chemical wastes. Here we report a light-powered DNA bipedal walker based on a design principle derived from cellular walkers. The walker has two identical feet and the track has equal binding sites; yet the walker gains a direction by pure physical mechanisms that autonomously amplify an intrasite asymmetry into a ratchet effect. The nanowalker is free of any chemical waste. It has a distinct thermodynamic feature that it possesses the same equilibrium before and after operation, but generates a truly nonequilibrium distribution during operation. The demonstrated design principle exploits mechanical effects and is adaptable for use in other nanomachines. |
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Authors:
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Juan Cheng; Sarangapani Sreelatha; Ruizheng Hou; Artem Efremov; Ruchuan Liu; Johan R C van der Maarel; Zhisong Wang |
Publication Detail:
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Type: Journal Article Date: 2012-12-06 |
Journal Detail:
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Title: Physical review letters Volume: 109 ISSN: 1079-7114 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2012 Dec |
Date Detail:
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Created Date: 2013-02-01 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 238104 Citation Subset: IM |
Affiliation:
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Department of Physics, National University of Singapore, Singapore 117542, Singapore. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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