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Wettability and switching of electrical conductivity in UV irradiated graphene oxide films

Bittolo Bon, Silvio and Piccinini, Massimo and Mariani, Alberto and Kenny, José Maria and Valentini, Luca (2011) Wettability and switching of electrical conductivity in UV irradiated graphene oxide films. Diamond and Related Materials, Vol. 20 (7), p. 871-874. eISSN 1879-0062. Article.

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DOI: 10.1016/j.diamond.2011.04.013

Abstract

Graphene oxide (GO) flakes were assembled into a thin film that was subsequently exposed to UV light. It was found that pristine hydrophilic and insulating GO films present a poorer wettability together with a decrease of their surface resistivity under UV irradiation. It was observed that the pristine hydrophilic and insulating properties can be restored after few hours from irradiation. Using infrared spectroscopy and micro-Raman spectroscopy, we study the relationship between surface chemistry and structural distortion of GO films before and after UV irradiation. The obtained results open a solvent free as well as easy route for the integration of GO based materials into optoelectronic devices.

Item Type:Article
ID Code:6094
Status:Published
Refereed:Yes
Uncontrolled Keywords:Graphene, UV treatment, surface structure, electrical properties
Subjects:Area 03 - Scienze chimiche > CHIM/04 Chimica industriale
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > Porto Conte Ricerche, Alghero
001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Elsevier
eISSN:1879-0062
Deposited On:30 May 2011 10:09

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