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Updated: May 22, 2026
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Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution
Published on: August 16, 2016
Polymer translocation through an electrically tunable nanopore in a multilayered semiconductor membrane
Dmitriy V Melnikov1, Alexey Nikolaev, Jean-Pierre Leburton
1Department of Physics, Clarkson University, Potsdam, NY, USA.
Methods in Molecular Biology (Clifton, N.J.)
|April 25, 2012
Summary
A novel computational model simulates electrostatic fields from semiconductor membranes, controlling polymer translocation through nanopores. This research offers precise control over biomolecule movement in solid-state devices.
Area of Science:
- Computational physics
- Biophysics
- Materials science
Background:
- Semiconductor membranes create electric fields influencing charged molecule dynamics.
- Nanopore translocation is crucial for DNA sequencing and analysis.
Purpose of the Study:
- To develop a computational model for electrostatic fields in semiconductor membranes.
- To investigate the impact of these fields on polymer translocation dynamics through nanopores.
Main Methods:
- Self-consistent solution of Poisson equation for electrostatic potentials and ion concentrations.
- Coupling electrostatic simulations with Langevin dynamics for polymer translocation modeling.
- Utilizing a silicon pn-junction semiconductor membrane for strong electric field generation.
Main Results:
- The computational model accurately predicts electrostatic fields and ion distributions.
- Demonstrated control over single-stranded DNA (ssDNA) translocation dynamics.
- Identified specific electric field effects: temporary trapping, slowing, or facilitated translocation.
Conclusions:
- The developed model provides a powerful tool for understanding and controlling biomolecule translocation.
- Semiconductor pn-junctions offer tunable electric fields for precise manipulation of polymers in nanopores.
- This work paves the way for advanced applications in nanopore sensing and DNA manipulation.
