Synthetic mechanochemical molecular swimmer.
A minimal design for a molecular swimmer is proposed that is 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.
Golestanian
Ramin
R
Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom. r.golestanian@sheffield.ac.uk
D032701:Biomimetics; D002384:Catalysis; D057446:Hydrodynamics; D055595:Mechanical Phenomena; D008956:Models, Chemical; D008968:Molecular Conformation; D009038:Motion; D055672:Static Electricity; D013269:Stochastic Processes; D013816:Thermodynamics