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Issue 3, 2018
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Photoelectrochemical response of carbon dots (CDs) derived from chitosan and their use in electrochemical imaging

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Abstract

We report a direct photoelectrochemical response from low cost carbon dots (CDs) prepared from chitosan via a solvothermal method. The carbon dots were covalently linked to an indium tin oxide (ITO) surface through a self-assembled silane monolayer. We attribute the photocurrent of the ITO–silane–CD surface to a photogenerated electron-transfer process by CDs under illumination with a wavelength of 420 nm to 450 nm. The self-assembled monolayer of CDs was used for ac-photocurrent imaging of the surface with micron scale lateral resolution. This discovery opens up new applications for CDs as biocompatible, light-addressable electrochemical sensors in bioanalytical and bioimaging applications.

Graphical abstract: Photoelectrochemical response of carbon dots (CDs) derived from chitosan and their use in electrochemical imaging

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Supplementary files

Article information


Submitted
23 Sep 2017
Accepted
14 Dec 2017
First published
12 Feb 2018

This article is Open Access

Mater. Horiz., 2018,5, 423-428
Article type
Communication

Photoelectrochemical response of carbon dots (CDs) derived from chitosan and their use in electrochemical imaging

D. Zhang, N. Papaioannou, N. M. David, H. Luo, H. Gao, L. C. Tanase, T. Degousée, P. Samorì, A. Sapelkin, O. Fenwick, M. Titirici and S. Krause, Mater. Horiz., 2018, 5, 423
DOI: 10.1039/C7MH00784A

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

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