Self‐diffusion of Brownian particles with hydrodynamic interaction and square step or well potential

1991 ◽  
Vol 94 (1) ◽  
pp. 563-568 ◽  
Author(s):  
B. Cichocki ◽  
B. U. Felderhof
Keyword(s):  
Hydrodynamic Interaction ◽  
Self Diffusion ◽  
Brownian Particles

scholarly journals Quantifying the Heat Dissipation from Molecular Motor’s Transport Properties in Nonequilibrium Steady States

2016 ◽  
Author(s):  
Wonseok Hwang ◽  
Changbong Hyeon
Keyword(s):  
Single Molecule ◽  
Molecular Motors ◽  
Heat Dissipation ◽  
Molecular Motor ◽  
Diffusion Constant ◽  
Nonequilibrium Steady States ◽  
Directed Motion ◽  
Mean Velocity ◽  
Self Diffusion ◽  
Brownian Particles

Theoretical analysis, which maps single molecule time trajectories of a molecular motor onto unicyclic Markov processes, allows us to evaluate the heat dissipated from the motor and to elucidate its dependence on the mean velocity and diffusivity. Unlike passive Brownian particles in equilibrium, the velocity and diffusion constant of molecular motors are closely inter-related to each other. In particular, our study makes it clear that the increase of diffusivity with the heat production is a natural outcome of active particles, which is reminiscent of the recent experimental premise that the diffusion of an exothermic enzyme is enhanced by the heat released from its own catalytic turnover. Compared with freely diffusing exothermic enzymes, kinesin-1 whose dynamics is confined on one-dimensional tracks is highly efficient in transforming conformational fluctuations into a locally directed motion, thus displaying a significantly higher enhancement in diffusivity with its turnover rate. Putting molecular motors and freely diffusing enzymes on an equal footing, our study offers thermodynamic basis to understand the heat enhanced self-diffusion of exothermic enzymes.

Time-dependent self-diffusion of Brownian particles with square well interaction

Langmuir ◽  
1992 ◽  
Vol 8 (12) ◽  
pp. 2889-2897 ◽  
Author(s):  
B. Cichocki ◽  
B. U. Felderhof
Keyword(s):  
Time Dependent ◽  
Self Diffusion ◽  
Brownian Particles ◽  
Square Well

Time-dependent self-diffusion in model suspensions of highly charged Brownian particles

1988 ◽  
Vol 149 (1-2) ◽  
pp. 123-163 ◽  
Author(s):  
G. Nägele ◽  
M. Medina-Noyola ◽  
R. Klein ◽  
J.L. Arauz-Lara
Keyword(s):  
Time Dependent ◽  
Self Diffusion ◽  
Brownian Particles
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