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공공누리This item is licensed Korea Open Government License

Title
Freeze-drying-induced changes in the properties of graphene oxides
Author(s)
함헌소대섭이준우
Publication Year
2014-05-21
Abstract
We have characterized and evaluated changes in graphene oxide (GO) induced by means of freeze-drying. In order to evaluate these changes, we investigated the effects of freeze-drying and chemical reduction processes on the structure, morphology, chemical composition, and Raman properties of GO and reduced GO. The freeze-dried GO had a pore structure, maintaining a pored morphology even after thermal annealing. The freeze-dried samples were composed of a single folded nanosheet or a few nanosheets stacked and folded. The oxygen-containing functional groups were removed not only during the freeze-drying but also during the reduction processes, with an accompanying decrease in the average size of the sp2 carbon domain (i.e. an increase in the ID/IG value).
Keyword
Freeze-drying; graphene oxides; Raman
Journal Title
nanotechnology
Citation Volume
25
ISSN
0957-4484
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Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14348
http://www.ndsl.kr/ndsl/search/detail/article/articleSearchResultDetail.do?cn=NART69974657
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