Dynamics of chemically powered nanodimer motors subject to an external force

Publication Type:

Journal Article

Authors:

Source:

Journal of Chemical Physics, Volume 131, Number 2 (2009)

URL:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-67650730833&doi=10.1063%2f1.3174929&partnerID=40&md5=d21948638b8566ee2cebe8145d16e1f0

Keywords:

Conservative force, Dimer-monomer, External force, Friction constants, Grafting (chemical), Interaction potentials, Motors, Multi-particle collision dynamics, Propulsion force, Rectangular channel, Reversible chemical reactions, Self-propelled motion, Simulation result, Solvent molecules, Stall force, Synthesis (chemical), Theoretical prediction, Thermodynamic efficiency

Abstract:

The chemically powered self-propelled directed motions of nanodimer motors confined in a rectangular channel and subject to an applied external conservative force are investigated using hybrid molecular dynamics/ multiparticle collision dynamics. The influence of factors, such as dimer sizes, chemical reaction type, and the nature of the interaction potentials between dimer monomers and solvent molecules, on the propulsion force and friction constant are examined. The stall force, for which the nanodimer has zero net velocity, and the thermodynamic efficiency of the motor are calculated. Both irreversible and reversible chemical reactions are considered. The simulation results are compared to theoretical predictions which are able to capture the major features of the self-propelled motion. © 2009 American Institute of Physics.

File Attachment:

PDF