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Size dependent characteristics of plasma synthesized carbonaceous nanoparticles

Journal of Applied Physics, 1 July 2012, Vol.112(1) [Peer Reviewed Journal]

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  • Title:
    Size dependent characteristics of plasma synthesized carbonaceous nanoparticles
  • Author: Kovacevic, E. ; Berndt, J. ; Strunskus, T. ; Boufendi, L.
  • Found In: Journal of Applied Physics, 1 July 2012, Vol.112(1) [Peer Reviewed Journal]
  • Subjects: Articles
  • Rights: Copyright 2012 Elsevier B.V., All rights reserved.
  • Description: Low temperature plasmas with their strong non equilibrium character offer unique possibilities for the production of nanoparticles. This contribution deals with size dependent properties of nanoparticles synthesized in a capacitively coupled discharge operated in mixtures of argon and acetylene. X-ray absorption measurements show that the particle properties dramatically change during the growth process. For nanoparticles under 10 nm in diameter, near edge x-ray absorption fine structure spectroscopy shows a sp 2 rich graphite-like material. The bonding situation changes with the increasing size of the dust particles, showing the formation of a sp 2 poor mantle around the sp 2 rich core. This phenomenon can be explained in terms of the nucleation and growth process of nanoparticles, i.e., due to differences in the heating of small nanoparticles (nuclei) and due to differences in the gas phase species involved in the nucleation phase and the surface growth phase.
  • Identifier: ISSN: 00218979 ; DOI: 10.1063/1.4731751

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