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Title: Bipedal nanowalker by pure physical mechanisms
Authors: Cheng, J.
Sreelatha, S.
Hou, R.
Efremov, A. 
Liu, R. 
Van Der Maarel, J.R.C. 
Wang, Z. 
Issue Date: 6-Dec-2012
Source: Cheng, J., Sreelatha, S., Hou, R., Efremov, A., Liu, R., Van Der Maarel, J.R.C., Wang, Z. (2012-12-06). Bipedal nanowalker by pure physical mechanisms. Physical Review Letters 109 (23) : -. ScholarBank@NUS Repository.
Abstract: 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. © 2012 American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.109.238104
Appears in Collections:Staff Publications

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