Nondestructive Characterization of Graphene Defects

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

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Author(s)

  • Dinh Loc Duong
  • Quang Huy Ta
  • Fei Yao
  • Quoc An Vu
  • Hye Yun Jeong
  • Sang Hoon Chae
  • Young Hee Lee

Detail(s)

Original languageEnglish
Pages (from-to)5183-5189
Journal / PublicationAdvanced Functional Materials
Volume23
Issue number41
Online published19 Apr 2013
Publication statusPublished - 6 Nov 2013
Externally publishedYes

Abstract

An effective method is reported for oxidizing graphene/copper film in which air oxidation of the underlying copper film occurs through the grain boundary lines of graphene without oxidizing graphene. This oxidation is realized by partially immersing the graphene/copper film in sodium chloride solution. Electrons generated during etching of the graphene/copper film in electrolyte diffuse into the film in contact with air, which eventually enhances air oxidation of copper through the graphene layer. While the graphene layer acts as a protective layer against oxidation of the copper film, oxidation of the underlying Cu film near graphene grain boundary lines is observed by optical microscopy. This observation could be attributed to the selective diffusion of oxygen radicals through isolated defects and graphene grain boundaries. The process involves no appreciable oxidation of the graphene layer including the graphene grain boundary, as confirmed by use of detailed Raman and X-ray photoelectron spectroscopy.

Research Area(s)

  • copper, grain boundaries, graphene, optical microscopy, Raman spectroscopy, selective oxidations

Citation Format(s)

Nondestructive Characterization of Graphene Defects. / Ly, Thuc Hue; Duong, Dinh Loc; Ta, Quang Huy; Yao, Fei; Vu, Quoc An; Jeong, Hye Yun; Chae, Sang Hoon; Lee, Young Hee.

In: Advanced Functional Materials, Vol. 23, No. 41, 06.11.2013, p. 5183-5189.

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