Thinning of large-area graphene film from multilayer to bilayer with a low-power CO2 laser

Zhe Lin, Ting Huang, Xiaohui Ye, Minlin Zhong, Lin Li, Juan Jiang, Wen Zhang, Lili Fan, Hongwei Zhu

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Bilayer graphene has attracted a great deal of attention for many electronic and optical applications. Although large-area bilayer graphene can be synthesized by chemical vapor deposition (CVD), multilayer growth often occurs and subsequent processes are required to obtain uniform bilayer films. We report an efficient way of thinning multilayer graphene film by low-power CO2 laser irradiation in vacuum. With a laser power density of ∼102 W cm-2, pristine graphene film of 4-5 layers can be thinned to a bilayer free of defects in 30 s. Contrary to previous laser-assisted graphene thinning processes, which reduced graphene layers precisely and locally with a high power density and a small beam diameter, our approach enables high-efficiency thinning of large-area graphene film whilst using a significantly reduced power density and an increased laser beam diameter.

Original languageEnglish
Article number275302
JournalNanotechnology
Volume24
Issue number27
DOIs
Publication statusPublished - 2013 Jul 12
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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