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Title: Synthesis of few layer graphene by direct exfoliation of graphite and a Raman spectroscopic study

The exfoliation of graphene from pristine graphite in a liquid phase was achieved successfully via sonication followed by centrifugation method. Ultraviolet–visible (UV–vis) spectra of the obtained graphene dispersions at different exfoliation time indicated that the concentration of graphene dispersion increased markedly with increasing exfoliation time. The sheet-like morphology of the exfoliated graphene was revealed by Scanning Electron Microscopy (SEM) image. Further, the morphological change in different exfoliation time was investigated by Atomic Force Microscopy (AFM). A complete structural and defect characterization was probed using micro-Raman spectroscopic technique. The shape and position of the 2D band of Raman spectra revealed the formation of bilayer to few layer graphene. Also, Raman mapping confirmed the presence of uniformly distributed bilayer graphene sheets on the substrate.
Authors:
; ;  [1] ;  [2]
  1. Department of Laser Studies, School of Physics, Madurai Kamaraj University, Madurai-625021, India. (India)
  2. Department of Chemistry, Thiagarajar College of Engineering, Madurai-625015, India. (India)
Publication Date:
OSTI Identifier:
22251283
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 4; Journal Issue: 2; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ATOMIC FORCE MICROSCOPY; CENTRIFUGATION; DISPERSIONS; GRAPHENE; GRAPHITE; LAYERS; LIQUIDS; RAMAN SPECTRA; SCANNING ELECTRON MICROSCOPY; SUBSTRATES; SYNTHESIS