期刊
MATERIALS HORIZONS
卷 5, 期 3, 页码 423-428出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7mh00784a
关键词
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资金
- EU [H2020-MSCA-IF-2014-660489]
- BBSRC [BB/P026788/1]
- EPSRC [EP/R021554/1]
- Agence Nationale de la Recherche through the Labex projects CSC within the Investissement d'avenir program [ANR-10-LABX-0026 CSC, ANR-10-120 IDEX-0002-02]
- International Center for Frontier Research in Chemistry (icFRC
- Biotechnology and Biological Sciences Research Council [BB/P026788/1] Funding Source: researchfish
- Engineering and Physical Sciences Research Council [EP/R021554/1] Funding Source: researchfish
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.
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