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Shin, Hyeon Suk
Lab for Carbon and 2D Materials
Research Interests
  • Two-dimensional materials: graphene, transition metal dichalcogenides, h-BN, and their heterostructures

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Control of size and physical properties of graphene oxide by changing the oxidation temperature

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Title
Control of size and physical properties of graphene oxide by changing the oxidation temperature
Author
Kang, Dong-WooShin, Hyeon Suk
Issue Date
2012-01
Publisher
KOREAN CARBON SOC
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 20 degrees C, 27 degrees C and 35 degrees C 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 mu m at 20 degrees C, 1.24 and 10.5 mu m at 27 degrees C, and 1.18 and 8.5 mu m at 35 degrees C. 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.
URI
https://scholarworks.unist.ac.kr/handle/201301/3593
URL
http://koreascience.or.kr/article/JAKO201222350106279.page
DOI
10.5714/CL.2012.13.1.039
ISSN
1976-4251
Appears in Collections:
CHM_Journal Papers
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