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Structure and Vibrational Properties of Isolated Carbon Nanocrystallites

  • V. I. Merkulov (a1), J. S. Lannin (a1) and J. M. Cowley (a2)

Abstract

Small isolated nanocrystallites of carbon have been prepared on amorphous SiO2 and studied by interference enhanced Raman scattering (IERS) and scanning transmission electron microscopy (STEM). A new mode of dark field STEM, using a thin annular detector, has allowed imaging of 1–2 nm graphite-like particles using (002) diffraction. For such small particles, the Raman spectra provide the first evidence for changes in the phonon density of states of a nanocrystalline system.

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