Size quantization in small semiconductor particles

A. J. Nozik, Ferd Williams, M. T. Nenadović, T. Rajh, O. I. Mićić

Research output: Contribution to journalArticlepeer-review

231 Scopus citations


Optical effects due to size quantization in three dimensions have been observed for CdS and PbS colloids with particle diameters less than 50 A and 20 to 200 Å, respectively. The optical absorption edge is blue shifted ∼0.9 eV for the CdS colloid; for PbS colloids the shift is ∼2 eV for particle diameters 20-30 Å, and ∼1 eV for particle diameters 50-200 Å. The results are consistent with perturbation of the semiconductor band structure due to carrier confinement resulting in an increase in the effective band gap.

Original languageEnglish (US)
Pages (from-to)397-399
Number of pages3
JournalJournal of physical chemistry
Issue number3
StatePublished - 1985
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry


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