Electron energy loss spectroscopy of single silicon nanocrystals: The conduction band

P. E. Batson, J. R. Heath

Research output: Contribution to journalArticle

87 Scopus citations

Abstract

Spatially resolved electron energy loss spectroscopy has been performed on single, H-terminated, Si nanocrystals in the size range 25500. The particles were prepared via the gas-phase photolysis of a dilute Si2H6/He mixture in a gas flow cell, and deposited on a holey carbon grid for analysis. Energy loss within a few eV of the core 2p ionization edge reveals information about the conduction band states at 1 and L1 in the Brillouin zone. The conduction band edge is observed to shift to higher energy as the inverse square of the particle radius. In addition, a strong increase in the oscillator strength for these transitions is observed for decreasing particle sizes below 60.

Original languageEnglish (US)
Pages (from-to)911-914
Number of pages4
JournalPhysical review letters
Volume71
Issue number6
DOIs
StatePublished - Jan 1 1993

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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