Photoelectrochemical response of carbon dots (CDs) derived from chitosan and their use in electrochemical imaging - Archive ouverte HAL
Article Dans Une Revue Materials Horizons Année : 2018

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

Résumé

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.

Domaines

Matériaux
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Dates et versions

hal-03633339 , version 1 (06-04-2022)

Identifiants

Citer

De-Wen Zhang, Nikolaos Papaioannou, Naomi Michelle David, Hui Luo, Hui Gao, et al.. Photoelectrochemical response of carbon dots (CDs) derived from chitosan and their use in electrochemical imaging. Materials Horizons, 2018, 5 (3), pp.423-428. ⟨10.1039/C7MH00784A⟩. ⟨hal-03633339⟩
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