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Issue 13, 2021
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High-resolution imaging of catalytic activity of a single graphene sheet using electrochemiluminescence microscopy

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Abstract

Here, the electrocatalytic activity of a single graphene sheet is mapped using electrochemiluminescence (ECL) microscopy with a nanometer resolution. The achievement of this high-spatial imaging relies on the varied adsorption of hydrogen peroxide at different sites on the graphene surface, leading to unsynchronized ECL emission. By shortening the exposure time to 0.2 ms, scattered ECL spots are observed in the ECL image that are not overlaid with the spots in the consecutive images. Accordingly, after stacking all the images into a graph, the ECL intensity of each pixel could be used to reflect the electrocatalytic features of the graphene surface with a resolution of 400 nm. This novel ECL method efficiently avoids the long-standing problem of classic ECL microscopy regarding the overlap of ECL emissions from adjacent regions and enables the nanometer spatial resolution of ECL microscopy for the first time.

Graphical abstract: High-resolution imaging of catalytic activity of a single graphene sheet using electrochemiluminescence microscopy

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Supplementary files

Article information


Submitted
22 Dec 2020
Accepted
15 Feb 2021
First published
16 Feb 2021

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2021,12, 4794-4799
Article type
Edge Article

High-resolution imaging of catalytic activity of a single graphene sheet using electrochemiluminescence microscopy

H. Zhu, D. Jiang and J. Zhu, Chem. Sci., 2021, 12, 4794
DOI: 10.1039/D0SC06967A

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

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    [Original citation] - Published by The Royal Society of Chemistry.

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