Influence of the laser irradiation on the electrochemical and spectroscopic peculiarities of graphene-chitosan composite film

Activation of the chitosan-modified graphene cast on indium-tin-oxide electrodes was performed with laser irradiation. The composite electrodes were characterised spectroscopically and electrochemically applying Fourier transform infrared and Raman spectroscopies, cyclic voltammetry and electrochemi...

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Bibliographic Details
Published in:Electrochimica acta 2014-06, Vol.132, p.265-276
Main Authors: Celiešiūtė, Raimonda, Trusovas, Romualdas, Niaura, Gediminas, Švedas, Vitas, Račiukaitis, Gediminas, Ruželė, Živilė, Pauliukaite, Rasa
Format: Article
Language:English
Subjects:
Activation
Chitosan
Electrochemical impedance spectroscopy
Electrodes
Graphene
Irradiation
Laser irradiation
Lasers
Raman spectroscopy
Spectroscopy
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Summary:Activation of the chitosan-modified graphene cast on indium-tin-oxide electrodes was performed with laser irradiation. The composite electrodes were characterised spectroscopically and electrochemically applying Fourier transform infrared and Raman spectroscopies, cyclic voltammetry and electrochemical impedance spectroscopy, respectively. Significant rise in the double-layer capacitance was obtained after the laser irradiation of the modified graphene film formed from its dispersion in chitosan solution. Effect of the laser irradiation depended on a load of the modified graphene in the film. The laser treatment improved electrochemical properties of the electrodes made of the modified chitosan-graphene-film due to creation of edge defects and formation of nanocrystalline structures from graphene flakes.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2014.03.137