Multivariate analysis of nanoparticle translocation through a nanopore to improve the accuracy of resistive pulse sensing.

Phys Chem Chem Phys

Micro Nano Systems Laboratory (MNSL), Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.

Published: February 2024

The advent of nanopore-based sensors based on resistive pulse sensing gave rise to a remarkable breakthrough in the detection and characterization of nanoscale species. Some strong correlations have been reported between the resistive pulse characteristics and the particle's geometrical and physical properties. These correlations are commonly used to obtain information about the particles in commercial devices and research setups. The correlations, however, do not consider the simultaneous effect of influential factors such as particle shape and off-axis translocation, which complicates the extraction of accurate information from the resistive pulses. In this paper, we numerically studied the impact of the shape and position of particles on pulse characteristics in order to estimate the errors that arise from neglecting the influence of multiple factors on resistive pulses. We considered the sphere, oblate, and prolate particles to investigate the nanoparticle shape effect. Moreover, the trajectory dependency was examined by considering the translocation of nanoparticles away from the nanopore axis. Meanwhile, the shape effect was studied for different trajectories. We observed that the simultaneous effects of influential parameters could lead to significant errors in estimating particle properties if the coupled effects are neglected. Based on the results, we introduce the "pulse waveshape" as a novel characteristic of the resistive pulse that can be utilized as a decoupling parameter in the analysis of resistive pulses.

Download full-text PDF

Source
http://dx.doi.org/10.1039/d3cp05565eDOI Listing

Publication Analysis

Top Keywords

resistive pulse
16
resistive pulses
12
pulse sensing
8
pulse characteristics
8
resistive
7
pulse
5
multivariate analysis
4
analysis nanoparticle
4
nanoparticle translocation
4
translocation nanopore
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!