Surface-Coated CdS Nanocrystals |
| J.R.L. Fernandeza, M. de Souza-Pariseb and P.C. Moraisb,c
aUniversidade Estadual de Santa Cruz, Campus Soane Nazaré de Andrade, Ilhéus BA 45662-900, Brazil bUniversidade de Brasília, Instituto de Física, Núcleo de Física Aplicada, Brasília DF 70910-900, Brazil cHuazhong University of Science and Technology, School of Automation, Wuhan 430074, China |
| Received: January 2, 2013; in final form: April 20, 2013 |
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| CdS nanocrystals were prepared using a standard colloidal route (co-precipitation chemical reaction) whereas modulation of the optical and structural properties was realized via surface coating the nanocrystals with ethylene glycol molecules using an in situ procedure. The as-produced nanocrystals were characterized by X-ray diffraction, Raman spectroscopy, UV-absorption measurements and photoluminescence. The nanocrystal quality was revealed by the spectroscopic data, though the final product presents a mixture of both zinc blende (cubic) and wurtzite (hexagonal) phases. The X-ray data indicated that the concentration of the ethylene glycol used during the synthesis process modulates the nanocrystal size and the crystal phase of the end material. |
DOI: 10.12693/APhysPolA.124.108 PACS numbers: 78.30.Fs, 78.40.Fy, 78.55.Et, 78.67.Bf, 78.70.Ck |