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Related Experiment Video

Updated: May 26, 2026

Fine-tuning the Size and Minimizing the Noise of Solid-state Nanopores
09:43

Fine-tuning the Size and Minimizing the Noise of Solid-state Nanopores

Published on: October 31, 2013

Modeling and simulation of nanoparticle separation through a solid-state nanopore.

Talukder Z Jubery1, Anmiv S Prabhu, Min J Kim

  • 1School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164, USA.

Electrophoresis
|January 7, 2012
PubMed
Summary
This summary is machine-generated.

Efficient nanoparticle separation using nanopore devices is possible by controlling pore surface charge density. This study demonstrates effective separation of high-density lipoprotein (HDL) and low-density lipoprotein (LDL) nanoparticles.

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Last Updated: May 26, 2026

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09:43

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Published on: October 31, 2013

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Published on: December 2, 2011

Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution
11:55

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Published on: August 16, 2016

Area of Science:

  • Nanotechnology and Materials Science
  • Biophysics and Physical Chemistry

Background:

  • Electrokinetic phenomena, including electroosmosis and electrophoresis, offer potential for nanoparticle separation via nanopore devices.
  • Effective separation is influenced by particle/pore characteristics, applied voltage, and electrolyte concentration.

Purpose of the Study:

  • To develop and utilize a continuum-based mathematical model for optimizing nanopore-based nanoparticle separation.
  • To investigate the critical role of pore surface charge density in achieving efficient separation.

Main Methods:

  • A mathematical model integrating Poisson-Nernst-Planck, Navier-Stokes, and Langevin equations was employed.
  • Numerical simulations were performed to analyze the translocation of high-density lipoprotein (HDL) and low-density lipoprotein (LDL) nanoparticles.

Main Results:

  • Membrane pore surface charge density was identified as a crucial parameter for effective nanoparticle separation.
  • Simulations indicate that a pore surface charge density of approximately -4.0 mC/m² enables efficient HDL from LDL separation in a 0.2 M KCl solution.
  • Pore length and diameter showed less significance in the nanoparticle separation process under the studied conditions.

Conclusions:

  • Nanopore-based devices, guided by mathematical modeling, can achieve precise separation of nanoparticles like HDL and LDL.
  • Optimizing pore surface charge density is key to designing efficient nanopore separation platforms for biological applications.