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

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

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 atmosp...

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Veröffentlicht in:Journal of materials science 2009-08, Vol.44 (16), p.4315-4320
Hauptverfasser: Park, Kwanhwi, Yu, Hong Jeong, Chung, Won Keun, Kim, Byung-Jea, Kim, Sung Hyun
Format: Artikel
Sprache:eng
Schlagworte:
Cadmium
Cadmium sulfide
Cadmium sulfides
Characterization and Evaluation of Materials
Classical Mechanics
Compact disks
Crystallography and Scattering Methods
Emission
Heat treatment
Heptanes
Materials Science
Nanoparticles
Polymer Sciences
Solid Mechanics
Sulfides
Zinc sulfide
Zinc sulfides
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Zusammenfassung: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.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-009-3641-2