The mechanism of graphene oxide as a growth template for complete reduced graphene oxide coverage on an SiO2 substrate

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Jingfeng Huang
  • Derrick Fam
  • Hu Chen
  • Da Zhan
  • Steve H. Faulkner
  • Myra A. Nimmo
  • Alfred Iing Yoong Tok

Detail(s)

Original languageEnglish
Pages (from-to)109-114
Journal / PublicationJournal of Materials Chemistry C
Volume2
Issue number1
Online published22 Oct 2013
Publication statusPublished - 7 Jan 2014
Externally publishedYes

Abstract

Reduced Graphene Oxide (rGO) has the distinct advantage of an aqueous and industrial-scalable production route. However large deviation in the electrical resistivity of fabricated rGO devices, caused by inhomogeneous coverage of rGO on the substrate, prevents its practical application in electronic devices. This critical problem could be solved by using an ethanol chemical vapour deposition (CVD) treatment on graphene oxide (GO). With the treatment, not only GO is reduced to rGO, but also rGO preferentially grows outwards from the edges of the existing GO template and enlarge in size until rGO completely covers the substrate. The growth sequence is presented and our results indicate that the growth supports the free radical condensate growth mechanism. After the ethanol CVD treatment, the standard deviation in electrical resistivity decreased significantly by 99.95% (1.60 × 106 to 7.72 × 10 2 Ω per square) in comparison with hydrazine-reduced rGO substrates. As no carbon signatures on the substrate were observed when no template was used, this work indicates that GO could act as a template for subsequent formation of rGO. 

Citation Format(s)

The mechanism of graphene oxide as a growth template for complete reduced graphene oxide coverage on an SiO2 substrate. / Huang, Jingfeng; Fam, Derrick; He, Qiyuan; Chen, Hu; Zhan, Da; Faulkner, Steve H.; Nimmo, Myra A.; Yoong Tok, Alfred Iing.

In: Journal of Materials Chemistry C, Vol. 2, No. 1, 07.01.2014, p. 109-114.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal