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Shin, Hyeon Suk
Lab for Nanomaterials and Nanoanalysis(LNN)
Research Interests
  • Two-dimensional materials, graphene, transition metal dichalcogenides, h-BN, heterostructure

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Control of Size and Physical Properties of Graphene Oxide by Changing Oxidation Temperature

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Title
Control of Size and Physical Properties of Graphene Oxide by Changing Oxidation Temperature
Author
Kang, Dong-WooShin, Hyeon Suk
Keywords
graphene; graphene oxide; graphite oxide; degree of oxidation
Issue Date
2012
Publisher
한국탄소학회
Citation
CARBON LETTERS, v.13, no.1, pp.39 - 43
Abstract
The size and the physical properties of graphene oxide sheets were controlled by changing the oxidation temperature of graphite. Graphite oxide (GO) samples were prepared at different oxidation temperatures of , and using a modified Hummers' method. The carbon-to-oxygen (C/O) ratio and the average size of the GO sheets varied according to the oxidation temperature: 1.26 and 12.4 at , 1.24 and 10.5 at , and 1.18 and 8.5 at . This indicates that the C/O ratio and the average size of the graphene oxide sheets respectively increase as the oxidation temperature decreases. Moreover, it was observed that the surface charge and optical properties of the graphene oxide sheets could be tuned by changing the temperature. This study demonstrates the tunability of the physical properties of graphene oxide sheets and shows that the properties depend on the functional groups generated during the oxidation process.
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DOI
http://dx.doi.org/10.5714/CL.2012.13.1.039
ISSN
1976-4251
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