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A Chemical Gas Sensor from Large-Scale Thermal CVD Derived Graphene
Published online by Cambridge University Press: 03 March 2011
Abstract
Large-scale graphene sheets were grown on thin nickel film coated Si substrates using a reliable and repeatable thermal Chemical Vapor Deposition (CVD) technique. The graphene films were then transferred onto a SiO2 coated Si wafer to fabricate a 5 mm x 5 mm resistive sensor structure. Raman spectroscopy analysis confirmed the existence of graphene. Preliminary sensing results were demonstrated by the detection of hazardous gases such as NO2 and MMH (mono-methyl hydrazine). Characterization of the device channel resistivity (switching response) was conducted as a function of the analyte type and concentration. The sensor response indicates a charge transfer mechanism between the analytes and graphene.
- Type
- Research Article
- Information
- MRS Online Proceedings Library (OPL) , Volume 1303: Symposium Y – Nanomaterials Integration for Electronics, Energy and Sensing , 2011 , mrsf10-1303-y09-03
- Copyright
- Copyright © Materials Research Society 2011
References
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