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Growth and optical characterization of colloidal CdTe nanoparticles capped by a bifunctional molecule

✍ Scribed by M.S. Abd El-sadek; S. Moorthy Babu

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
613 KB
Volume
405
Category
Article
ISSN
0921-4526

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✦ Synopsis

Thiol-capped CdTe nanoparticles were synthesized in aqueous solution by wet chemical route. CdTe nanoparticles with bifunctional molecule mercaptoacetic acid as a stabilizer were synthesized at pH E 11.2 and using potassium tellurite as tellurium source. The effect of refluxing time on the preparation of these samples was measured using UV-vis absorption and photoluminescence analysis. By increasing the refluxing time the UV-vis absorption and photoluminescence results show that the band edge emission is redshifted. The synthesized thiol-capped CdTe were characterized with FT-IR, TEM and TG-DTA. The particle size was calculated by the effective mass approximation (EMA). The role of precursors, their composition, pH and reaction procedure on the development of nanoparticles are analyzed.

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