Effect of heat-treatment on CdS and CdS/ZnS nanoparticles

Kwanhwi Park, Hong Jeong Yu, Won Keun Chung, Byung Jea Kim, Sung Hyun Kim

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Mono-dispersed and spherical cadmium sulfide (CdS) nanoparticles and cadmium sulfide/zinc sulfide (CdS/ZnS) nanoparticles, 4-5 nm in diameter, were synthesized in a heptane-AOT-water microemulsion system. The heat treatment of CdS and CdS/ZnS nanoparticles was annealed at 570 °C under the air atmosphere. The heat-treated nanoparticles were of variable large sizes and had enhanced crystallinity. UV-Vis spectra of heat-treated CdS and CdS/ZnS nanoparticles revealed a flat shape similar to that of bulk CdS compounds. The difference between the PL emission bands of organic-coated nanoparticles and heat-treated nanoparticles was small. The PL emission energy of heat-treated nanoparticles was improved by about 2-3 times compared with that of organic-coated nanoparticles.

Original languageEnglish
Pages (from-to)4315-4320
Number of pages6
JournalJournal of Materials Science
Volume44
Issue number16
DOIs
Publication statusPublished - 2009 Aug

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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