Document Detail


Bipedal nanowalker by pure physical mechanisms.
MedLine Citation:
PMID:  23368271     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
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.
Authors:
Juan Cheng; Sarangapani Sreelatha; Ruizheng Hou; Artem Efremov; Ruchuan Liu; Johan R C van der Maarel; Zhisong Wang
Publication Detail:
Type:  Journal Article     Date:  2012-12-06
Journal Detail:
Title:  Physical review letters     Volume:  109     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2013-02-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  238104     Citation Subset:  IM    
Affiliation:
Department of Physics, National University of Singapore, Singapore 117542, Singapore.
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