Issue 44, 2021

Quantification of the charge transport processes inside carbon nanopipettes

Abstract

Conductive nanopipettes have been extensively used as powerful multifunctional probes for electrochemical and ion transport measurements, while the involved charge transfer processes have not been fully explored. In this paper, we use both experimental and simulation methods to de-convolute and quantify the respective electron transfer (ET) and ion transport (IT) contributions to the resulting current signals in carbon nanopipettes (CNPs). The results present that the current signals in CNPs are determined by ET in the case of low solution depth and long timescales, while IT becomes dominant at short timescales or high solution depth. In addition, the electrochemically and chemically irreversible ET processes in CNPs were also quantified. The elucidated and quantified charge transport processes inside CNPs will help control and optimize the IT and ET processes at the nanoscale, promoting better and broad usage of conductive nanopipettes in single-entity sensing and imaging applications.

Graphical abstract: Quantification of the charge transport processes inside carbon nanopipettes

Supplementary files

Article information

Article type
Edge Article
Submitted
30 juil. 2021
Accepted
04 oct. 2021
First published
04 oct. 2021
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2021,12, 14752-14757

Quantification of the charge transport processes inside carbon nanopipettes

R. Liu, Y. Ma, X. Shen and D. Wang, Chem. Sci., 2021, 12, 14752 DOI: 10.1039/D1SC04282C

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