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Transition of gas sensing behavior in non-reduced graphene oxides with thermal annealing
- Issue Date
- 1-Dec-2014
- Publisher
- ELSEVIER
- Keywords
- Non-reduced graphene oxide; Reduced graphene oxide; Gas sensing behavior; Structure change; Thermal reduction
- Citation
- MATERIALS LETTERS, v.136, pp.164 - 167
- Journal Title
- MATERIALS LETTERS
- Volume
- 136
- Start Page
- 164
- End Page
- 167
- ISSN
- 0167-577X
- Abstract
- Graphene oxide (GO) films were deposited via spin coating on SiO2/Si wafers patterned with interdigitated Pt electrodes. Gas sensing behaviors of GO films and their heat treated films at 200 degrees C in argon atmosphere were characterized. Apparently, non-reduced graphene oxide exhibits n-type and reduced graphene oxide films show p-type behavior on ethanol gas. The change of oxygen functional groups and bond structure are suggested to explain the transition. The combinatorial use of GO and reduced GO (r-GO) in a gas sensor array will provide practical solutions to measure various gases with high selectivity and sensitivity. (C) 2014 Elsevier B.V. All rights reserved.
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Related Researcher
- Yoon, Young Soo
- Engineering (Department of Materials Science & Engineering)