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

Journal Article · Sat Feb 15 00:00:00 EST 2014 · AIP Advances

DOI:https://doi.org/10.1063/1.4866595· OSTI ID:22251283

Gayathri, S.; Jayabal, P.; Kottaisamy, M. ^[1]

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1. Department of Chemistry, Thiagarajar College of Engineering, Madurai-625015, India. (India)

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.

• OSTI ID: 22251283
• Journal Information: AIP Advances, Journal Name: AIP Advances Journal Issue: 2 Vol. 4; ISSN AAIDBI; ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMIC FORCE MICROSCOPY
CENTRIFUGATION
DISPERSIONS
GRAPHENE
GRAPHITE
LAYERS
LIQUIDS
RAMAN SPECTRA
SCANNING ELECTRON MICROSCOPY
SUBSTRATES
SYNTHESIS