Nanocrystalline CdSe thin films of different morphologies in thermal evaporation process

U. Pal, M. Herrera Zaldivar, R. Sathyamoorthy, V. Manjuladevi, P. Sudhagar, S. Chandra Mohan, S. Senthllarasu

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Cadmium selenide nanocrystalline thin films of quasi-spherical morphology are prepared by evaporating CdSe nanopowders on glass substrates. Slightly oval shaped CdSe particles of about 165 nm average size (in 2-D) could be assembled over glass substrates by controlling the film thickness. Morphologies like assembly of particles, interconnected particles with mosaic-like structures and thin films of smooth surfaces could be prepared simply by controlling film thickness. A mechanism for such morphological variations is proposed. Observed variation of band gap energy in the films is explained in terms of quantum confinement effect and substrate-film interface strain.

Original languageEnglish
Pages (from-to)6474-6480
Number of pages7
JournalJournal of Nanoscience and Nanotechnology
Volume8
Issue number12
Publication statusPublished - Dec 2008

Keywords

  • CdSe thin films
  • Morphology
  • Nanocrystalline
  • Optical properties

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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