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The role of pore geometry in single nanoparticle detection

Journal Article · · ACS Nano
DOI:https://doi.org/10.1021/nn303126n· OSTI ID:1239207
 [1];  [2];  [3];  [4];  [5];  [6];  [3];  [4]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Irvine, CA (United States)
  2. Univ. of California, Irvine, CA (United States); Univ. College Cork (Ireland)
  3. Univ. of California, Irvine, CA (United States)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. Univ. College Cork (Ireland)
In this study, we observe single nanoparticle translocation events via resistive pulse sensing using silicon nitride pores described by a range of lengths and diameters. Pores are prepared by focused ion beam milling in 50 nm-, 100 nm-, and 500 nm-thick silicon nitride membranes with diameters fabricated to accommodate spherical silica nanoparticles with sizes chosen to mimic that of virus particles. In this manner, we are able to characterize the role of pore geometry in three key components of the detection scheme, namely, event magnitude, event duration, and event frequency. We find that the electric field created by the applied voltage and the pore’s geometry is a critical factor. We develop approximations to describe this field, which are verified with computer simulations, and interactions between particles and this field. In so doing, we formulate what we believe to be the first approximation for the magnitude of ionic current blockage that explicitly addresses the invariance of access resistance of solid-state pores during particle translocation. These approximations also provide a suitable foundation for estimating the zeta potential of the particles and/or pore surface when studied in conjunction with event durations. We also verify that translocation achieved by electro-osmostic transport is an effective means of slowing translocation velocities of highly charged particles without compromising particle capture rate as compared to more traditional approaches based on electrophoretic transport.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1239207
Report Number(s):
LLNL-JRNL--564494
Journal Information:
ACS Nano, Journal Name: ACS Nano Journal Issue: 9 Vol. 6; ISSN 1936-0851
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (23)

Nanopore-based analysis of biochemical species journal July 2015
Single-Particle Electrophoresis in Nanochannels journal December 2014
Discriminating single-bacterial shape using low-aspect-ratio pores journal December 2017
Volume discrimination of nanoparticles via electrical trapping using nanopores journal March 2019
Microfluidic and Nanofluidic Resistive Pulse Sensing: A Review journal June 2017
Probing Dynamic Events of Dielectric Nanoparticles by a Nanoelectrode‐Nanopore Nanopipette journal May 2018
Low aspect ratio micropores for single-particle and single-cell analysis: Nanoanalysis journal April 2015
Voltage-Gated Nanoparticle Transport and Collisions in Attoliter-Volume Nanopore Electrode Arrays journal January 2018
Detection of Individual Molecules and Ions by Carbon Nanotube-Based Differential Resistive Pulse Sensor journal March 2018
Nanopore‐Based Protein Sequencing Using Biopores: Current Achievements and Open Challenges journal February 2020
Electrokinetic motion of single nanoparticles in single PDMS nanochannels journal January 2017
Tracking single-particle dynamics via combined optical and electrical sensing journal May 2013
Effects of access resistance on the resistive-pulse caused by translocating of a nanoparticle through a nanopore journal January 2014
Dynamics of polymer nanoparticles through a single artificial nanopore with a high-aspect-ratio journal January 2014
Optimal voltage for nanoparticle detection with thin nanopores journal January 2018
Surface coatings for solid-state nanopores journal January 2019
Characterization and manipulation of single nanoparticles using a nanopore-based electrokinetic tweezer journal January 2019
Rapid structural analysis of nanomaterials in aqueous solutions journal March 2017
Controlled size reduction and its underlying mechanism to form solid-state nanopores via electron beam induced carbon deposition journal August 2019
Construction of biomimetic smart nanochannels for confined water journal November 2013
The raspberry model for protein-like particles: Ellipsoids and confinement in cylindrical pores journal October 2016
The Raspberry model for protein-like particles: ellipsoids and confinement in cylindrical pores text January 2016
Optimal Voltage for Nanoparticle Detection with Thin Nanopores text January 2018

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