Volume 132, Issue 26 pp. 10502-10506
Zuschrift

Intracellular Wireless Analysis of Single Cells by Bipolar Electrochemiluminescence Confined in a Nanopipette

Yuling Wang

Yuling Wang

State Key Laboratory of Analytical Chemistry for Life and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093 China

These authors contributed equally to this work.

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Rong Jin

Rong Jin

State Key Laboratory of Analytical Chemistry for Life and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093 China

These authors contributed equally to this work.

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Prof. Neso Sojic

Corresponding Author

Prof. Neso Sojic

Bordeaux INP, Institute of Molecular Science (ISM), and CNRS UMR 5255, University of Bordeaux, 33607 Pessac, France

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Prof. Dechen Jiang

Corresponding Author

Prof. Dechen Jiang

State Key Laboratory of Analytical Chemistry for Life and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093 China

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Prof. Hong-Yuan Chen

Prof. Hong-Yuan Chen

State Key Laboratory of Analytical Chemistry for Life and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093 China

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First published: 25 March 2020
Citations: 36

Dedicated to the 100th anniversary of the School of Chemistry and Chemical Engineering, Nanjing University

Abstract

The inside walls of a nanopipette tip are decorated by a Pt deposit that is used as an open bipolar electrochemiluminescence (ECL) device to achieve intracellular wireless electroanalysis. The synergetic actions of nanopipette and of bipolar ECL lead to the spatial confinement of the voltage drop at the level of the Pt deposit, which generates ECL emission from luminol. The porous structure of Pt deposit permits the electrochemical transport of intracellular molecules into the nanopipette that is coupled with enzymatic reactions. Thus, the intracellular concentrations of hydrogen peroxide or glucose are measured in vivo as well as the intracellular sphingomyelinase activity. In comparison with the classic bipolar ECL, the remarkably low potential applied in our approach is restricted inside the nanopipette and it minimizes the potential bias of the voltage on the cellular activity. Accordingly, this wireless ECL approach provides a new direction for analysis of single living cells.

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