Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 23    No. 2    February 2013

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Characterization of Au/CdTe nanocomposites prepared by electrostatic interaction
Mohammad Mahbub RABBANI1, Dae-geun NAM2, Dae-han KIM3, Weontae OH3

1. Department of Bio-Fibers and Materials Science, Kyungpook National University, Daegu 702-701, Korea;
2. Dongnam Regional Division, Korea Institute of Industrial Technology, Busan 618-230, Kore

Abstract:Au/CdTe nanocomposites were prepared by electrostatic interaction between oppositely-charged gold (Au) and cadmium telluride (CdTe) nanoparticles. Au and CdTe nanoparticles were stabilized by 4-(dimethylamino)pyridine (DMAP) and 3-mercaptopropionic acid to develop positive and negative charges on their surfaces in aqueous solutions, respectively. The red shifts of the surface plasmon absorptions with the increase of Au content indicate that the sizes of the nanocomposites expanded due to the complex formation. Mixing ratio of Au and CdTe nanoparticles controls the structure of the resulting composites effectively. Moreover, the sizes and shapes of the mixed nanoparticles are important parameters for the formation of metal/semiconductor nanocomposites. The Au/CdTe nanocomposites were characterized by small angle X-ray scattering technique (SAXS), transmission electron microscopy (TEM), cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS).


Key words: electrostatic interaction; gold nanoparticles; CdTe nanoparticles; nanocomposites

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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