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Updated: Feb 11, 2026
08:31
A Closed-Type Wireless Nanopore Electrode for Analyzing Single Nanoparticles
Published on: March 20, 2019
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Metal alloy solid-state nanopores for single nanoparticle detection.
Diego Coglitore1, Andrea Merenda, Nicoletta Giamblanco
1Institut Européen des Membranes, UMR5635, Université de Montpellier CNRS ENSCM, Place Eugène Bataillon, 34090 Montpellier, France. sebastien.balme@umontpellier.fr.
Physical Chemistry Chemical Physics : PCCP
|April 27, 2018
Summary
This study reveals how nanopore surface properties affect nanoparticle sensing. Optimizing surface energy and hydrophilicity is key for accurate nanoparticle detection using resistive pulse methods.
Area of Science:
- Nanotechnology
- Materials Science
- Analytical Chemistry
Background:
- Solid-state nanopore technology is vital for nanoparticle characterization.
- Understanding nanopore surface influence on nanoparticle translocation dynamics is crucial for sensor development.
Purpose of the Study:
- To investigate the impact of nanopore inner surface properties on nanoparticle translocation dynamics.
- To explore how different metal alloy nanopores (titanium nitride, titanium-tantalum, tantalum) affect nanoparticle behavior.
Main Methods:
- Utilized single nanopores fabricated in metal alloys.
- Employed the resistive pulse method to study the translocation of ssDNA-coated polystyrene nanoparticles.
- Varied nanoparticle concentrations and applied voltages.
Main Results:
- Nanoparticle energy barrier for pore entry decreased with increased nanopore surface energy and hydrophilicity.
- Nanoparticle dwell time within the pore was dependent on the nanopore's surface state.
- Metal alloy composition significantly influenced pore surface characteristics.
Conclusions:
- Nanopore surface characteristics, including energy and hydrophilicity, directly impact nanoparticle translocation.
- Controlling the nanopore surface state is essential for reliable nanoparticle detection via resistive pulse experiments.
- This research provides insights for designing advanced nanopore sensors for nanoparticle analysis.
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