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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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Publication details

The article was received on 23 Sep 2017, accepted on 14 Dec 2017 and first published on 12 Feb 2018


Article type: Communication
DOI: 10.1039/C7MH00784A
Citation: Mater. Horiz., 2018,5, 423-428
  • Open access: Creative Commons BY-NC license
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    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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