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Simulation studies of polymer translocation through a channel.
H C Loebl1, R Randel, S P Goodwin
1Department of Physics and Astronomy, University of Wales, Cardiff, United Kingdom.
Summary
Monte Carlo simulations reveal that homopolymer translocation time (tau) depends non-trivially on temperature. Below a critical temperature, tau decreases with increasing temperature; above it, tau increases, aligning with experimental data.
Area of Science:
- Polymer physics
- Statistical mechanics
- Computational biophysics
Background:
- Understanding polymer translocation through channels is crucial for nanotechnology and biological processes.
- Previous studies have explored factors influencing translocation dynamics, but temperature dependence remains complex.
Purpose of the Study:
- To investigate the temperature dependence of homopolymer translocation time through a channel using Monte Carlo simulations.
- To compare simulation results with existing experimental findings.
Main Methods:
- Monte Carlo simulations were employed to model the translocation of homopolymers of length N.
- System parameters, including temperature and driving field strength, were systematically varied.
Main Results:
- Translocation time (tau) exhibited a non-trivial temperature dependence, with a critical temperature (theta(c)).
- Below theta(c), tau approximately T-1.4; above theta(c), tau increased with temperature.
- Simulation results for low temperatures and dependence on driving field strength agreed well with experimental data.
Conclusions:
- The study provides insights into the complex relationship between temperature and polymer translocation dynamics.
- Discrepancies in the N dependence of tau at lower N suggest the need for further investigation into simulation models or experimental conditions.