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Title: Autonomous synergic control of nanomotors
Authors: Liu, M.
Hou, R.
Cheng, J.
Loh, I.Y.
Sreelatha, S.
Tey, J.N.
Wei, J.
Wang, Z. 
Keywords: control
Issue Date: 25-Feb-2014
Citation: Liu, M., Hou, R., Cheng, J., Loh, I.Y., Sreelatha, S., Tey, J.N., Wei, J., Wang, Z. (2014-02-25). Autonomous synergic control of nanomotors. ACS Nano 8 (2) : 1792-1803. ScholarBank@NUS Repository.
Abstract: Control is a hallmark of machines; effective control over a nanoscale system is necessary to turn it into a nanomachine. Nanomotors from biology often integrate a ratchet-like passive control and a power-stroke-like active control, and this synergic active-plus-passive control is critical to efficient utilization of energy. It remains a challenge to integrate the two differing types of control in rationally designed nanomotor systems. Recently a light-powered track-walking DNA nanomotor was developed from a bioinspired design principle that has the potential to integrate both controls. However, it is difficult to separate experimental signals for either control due to a tight coupling of both controls. Here we present a systematic study of the motor and new derivatives using different fluorescence labeling schemes and light operations. The experimental data suggest that the motor achieves the two controls autonomously through a mechanics-mediated symmetry breaking. This study presents an experimental validation for the bioinspired design principle of mechanical breaking of symmetry for synergic ratchet-plus-power stroke control. Augmented by mechanical and kinetic modeling, this experimental study provides mechanistic insights that may help advance molecular control in future nanotechnological systems. © 2014 American Chemical Society.
Source Title: ACS Nano
ISSN: 19360851
DOI: 10.1021/nn406187u
Appears in Collections:Staff Publications

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