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Träfflista för sökning "WFRF:(Rubino Stefano) srt2:(2009)"

Search: WFRF:(Rubino Stefano) > (2009)

  • Result 1-9 of 9
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  • Rubino, Stefano, 1978-, et al. (author)
  • In-situ contacting of nanosheets and remote EMCD
  • 2009
  • In: 2nd International Workshop on Remote Electron Microscopy and In Situ Studies, Gothenburg, Sweden 16-18 November 2009.
  • Conference paper (other academic/artistic)
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  • Widenkvist, Erika, et al. (author)
  • Fabrication of graphene by bromine-intercalation and sonochemical exfoliation
  • 2009
  • Conference paper (peer-reviewed)abstract
    • We present a method of producing suspensions of graphene sheets by combining intercalation and mild sonication. Ultrasonic treatment of graphite leads to the formation of small graphene-like flakes in solution. The delamination of the graphite is dramatically increased by intercalation of bromine. After ultrasonic treatment, large amounts of graphene-like flakes with varying thickness are observed in SEM and TEM. They can be adsorbed onto a surface of a suitable substrate by a simple dipping technique. The effect of polar and non-polar solvents as well as adsorption of the graphene on hydrophobic and hydrophilic substrates will be demonstrated and compared. Finally, the general approach of using ultrasonic treatment and intercalation as a facile route to graphene synthesis compared to other methods will be discussed.
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  • Widenkvist, Erika, et al. (author)
  • Mild sonochemical exfoliation of bromine-intercalated graphite a new route towards graphene
  • 2009
  • In: Journal of Physics D. - : IOP Publishing Ltd. - 0022-3727 .- 1361-6463. ; 42:11, s. 112003-
  • Journal article (peer-reviewed)abstract
    • A method to produce suspensions of graphene sheets by combining solution-based bromine intercalation and mild sonochemical exfoliation is presented. Ultrasonic treatment of graphite in water leads to the formation of suspensions of graphite flakes. The delamination is dramatically improved by intercalation of bromine into the graphite before sonication. The bromine intercalation was verified by Raman spectroscopy as well as by x-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) calculations show an almost ten times lower interlayer binding energy after introducing Br2 into the graphite. Analysis of the suspended material by transmission and scanning electron microscopy (TEM and SEM) revealed a significant content of few-layer graphene with sizes up to 30 µm, corresponding to the grain size of the starting material
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  • Result 1-9 of 9

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