Synthetic Mechanochemical Molecular Swimmer

Details Synthetic Mechanochemical Molecular Swimmer Synthetic Mechanochemical Molecular Swimmer

2010-07-13

arxiv.org/abs/1007.2078v1

Phys. Rev. Lett. 105, 018103 (2010)

Physics

Biological Physics

4 pages, 3 figures

Scientific paper

A minimal design for a molecular swimmer is proposed that is a based on a mechanochemical propulsion mechanism. Conformational changes are induced by electrostatic actuation when specific parts of the molecule temporarily acquire net charges through catalyzed chemical reactions involving ionic components. The mechanochemical cycle is designed such that the resulting conformational changes would be sufficient for achieving low Reynolds number propulsion. The system is analyzed within the recently developed framework of stochastic swimmers to take account of the noisy environment at the molecular scale. The swimming velocity of the device is found to depend on the concentration of the fuel molecule according to the Michaelis-Menten rule in enzymatic reactions.

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