Abstract
Two methods for the synthesis of CdTe nanoparticles in zirconia sol-gel films are demonstrated. The nanoparticles were obtained by chemical reduction of Te(IV) using reducing agent (hydrazine) or tin chloride. Particle sizes ranging from 6 to 20 nm in diameter could be prepared by varying the experimetal parameters. The size and crystalline structure of the particles were characterized by optical absorption, X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. The film morphology was characterized by scanning force microscopy.
The film obtained by SnCl2 method is smooth and homogeneous. The dense structure of CdTe nanoparticles of a few nm in diameter is revealed. The films prepared with hydrazine are porous as a result of evolution of the decomposition gaseous products during the reduction.
Advantages and disadvantages of the two methods are discussed.
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Zelner, M., Minti, H., Reisfeld, R. et al. Preparation and Characterization of CdTe Nanoparticles in Zirconia Films Prepared by the Sol Gel Method. Journal of Sol-Gel Science and Technology 20, 153–160 (2001). https://doi.org/10.1023/A:1008751506579
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DOI: https://doi.org/10.1023/A:1008751506579