論文

査読有り
2010年6月

Graphene Oxide Sheets at Interfaces

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
  • Jaemyung Kim
  • ,
  • Laura J. Cote
  • ,
  • Franklin Kim
  • ,
  • Wa Yuan
  • ,
  • Kenneth R. Shull
  • ,
  • Jiaxing Huang

132
23
開始ページ
8180
終了ページ
8186
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/ja102777p
出版者・発行元
AMER CHEMICAL SOC

Graphite oxide sheet, now called graphene oxide (GO), is the product of chemical exfoliation of graphite and has been known for more than a century. GO has been largely viewed as hydrophilic, presumably due to its excellent colloidal stability in water. Here we report that GO is an amphiphile with hydrophilic edges and a more hydrophobic basal plane. GO can act like a surfactant, as measured by its ability to adsorb on interfaces and lower the surface or interfacial tension. Since the degree of ionization of the edge COOH groups is affected by pH, GO's amphiphilicity can be tuned by pH. In addition, size-dependent amphiphilicity of GO sheets is observed. Since each GO sheet is a single molecule as well as a colloidal particle, the molecule colloid duality makes it behave like both a molecular and a colloidal surfactant. For example, GO is capable of creating highly stable Pickering emulsions of organic solvents like solid particles. It can also act as a molecular dispersing agent to process insoluble materials such as graphite and carbon nanotubes in water. The ease of its conversion to chemically modified graphene could enable new opportunities in solution processing of functional materials.

Web of Science ® 被引用回数 : 1325

リンク情報
DOI
https://doi.org/10.1021/ja102777p
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000278717700067&DestApp=WOS_CPL
ID情報
  • DOI : 10.1021/ja102777p
  • ISSN : 0002-7863
  • Web of Science ID : WOS:000278717700067

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