Estimating band gap of amorphous diamond and nanocrystalline diamond powder by electron energy loss spectroscopy

H. Hirai, M. Terauchi, M. Tanaka, K. Kondo

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    Electronic properties such as band gap and density of states were estimated by electron energy loss spectroscopy for amorphous diamond synthesized from C60 fullerene by shock compression. The imaginary part of the dielectric function, ε2, obtained showed that the magnitude of the gap was 3.5 to 4.5 eV, a little smaller than that of crystalline diamond (5.5 eV), and that excitation of interband transition was not observed at X and L points but only at F points. The density of states around the gap was rather broad. These characteristic electronic properties observed can be explained by the unique atomic configuration of this material examined by radial distribution function (RDF) analysis.

    Original languageEnglish
    Pages (from-to)1703-1706
    Number of pages4
    JournalDiamond and Related Materials
    Volume8
    Issue number8-9
    DOIs
    Publication statusPublished - 1999 Aug

    Keywords

    • Amorphous diamond
    • Band gap
    • EELS

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Chemistry(all)
    • Mechanical Engineering
    • Materials Chemistry
    • Electrical and Electronic Engineering

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