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Polymer translocation through a nanopore driven by binding particles: influence of chain rigidity
1CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui Province 230026, People's Republic of China.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|November 7, 2014
Summary
Chain rigidity significantly impacts polymer translocation through nanopores. Increased rigidity slows down translocation and alters time distributions, revealing complex dynamics influenced by binding particles.
Area of Science:
- Polymer Physics
- Soft Matter Physics
- Nanotechnology
Background:
- Polymer translocation through nanopores is crucial for biological processes and nanotechnology applications.
- Understanding factors influencing translocation dynamics, such as chain properties and external agents, is essential.
Purpose of the Study:
- To investigate the effect of polymer chain rigidity on translocation dynamics in the presence of binding particles (BPs).
- To elucidate the relationship between chain stiffness, binding interactions, and translocation behavior.
Main Methods:
- Utilized two-dimensional Langevin dynamics simulations.
- Analyzed mean translocation time, radius of gyration, center of mass velocity, and translocation time distributions.
Main Results:
- Increased chain rigidity monotonically increases mean translocation time due to larger radius of gyration and reduced center of mass velocity.
- A power-law relationship between translocation time and persistence length was observed for weak binding.
- Translocation time distributions shift towards Gaussian and broaden with increasing chain rigidity.
Conclusions:
- Chain rigidity is a critical intrinsic property that significantly influences polymer translocation dynamics.
- The findings highlight a complex interplay between chain stiffness, binding particle concentration, and binding energy in governing translocation processes.
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