• 文献标题:   Fast and controlled fabrication of porous graphene oxide: application of AFM tapping for mechano-chemistry
  • 文献类型:   Article
  • 作  者:   CHU LY, KOROBKO AV, BUS M, BOSHUIZEN B, SUDHOLTER EJR, BESSELING NAM
  • 作者关键词:   porous network, graphene oxide, atomic force microscopy, oxygen plasma, mechanochemistry
  • 出版物名称:   NANOTECHNOLOGY
  • ISSN:   0957-4484 EI 1361-6528
  • 通讯作者地址:   Delft Univ Technol
  • 被引频次:   1
  • DOI:   10.1088/1361-6528/aaafc5
  • 出版年:   2018

▎ 摘  要

This paper describes a novel method to fabricate porous graphene oxide (PGO) from GO by exposure to oxygen plasma. Compared to other methods to fabricate PGO described so far, e.g. the thermal and steam etching methods, oxygen plasma etching method is much faster. We studied the development of the porosity with exposure time using atomic force microscopy (AFM). It was found that the development of PGO upon oxygen-plasma exposure can be controlled by tapping mode AFM scanning using a Si tip. AFM tapping stalls the growth of pores upon further plasma exposure at a level that coincides with the fraction of sp(2) carbons in the GO starting material. We suggest that AFM tapping procedure changes the bond structure of the intermediate PGO structure, and these stabilized PGO structures cannot be further etched by oxygen plasma. This constitutes the first report of tapping AFM as a tool for local mechanochemistry.