Propulsion of a molecular machine by asymmetric distribution of reaction--products
Ramin Golestanian, Tanniemola B. Liverpool, and Armand Ajdari
TL;DR
This paper presents a simple model for a molecular machine propelled by asymmetric reaction-product distribution, analyzing its velocity, fluctuations, and effects of hydrodynamics and reaction kinetics.
Contribution
It introduces a novel model for reaction-driven propulsion of molecular devices, including velocity calculations and analysis of hydrodynamic and kinetic effects.
Findings
Propulsive velocity depends on reaction asymmetry
Velocity fluctuations are characterized
Hydrodynamic effects influence propulsion efficiency
Abstract
A simple model for the reaction-driven propulsion of a small device is proposed as a model for (part of) a molecular machine in aqueous media. Motion of the device is driven by an asymmetric distribution of reaction products. The propulsive velocity of the device is calculated as well as the scale of the velocity fluctuations. The effects of hydrodynamic flow as well as a number of different scenarios for the kinetics of the reaction are addressed.
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