عنوان
Effects of surfactant, ratio of Cd:surfactant, amount of reductant and time reaction in the sonochemical synthesis of CdSe nanostructures
نویسنده (گان)
سبحاني,اعظم
چکیده مقاله
A sonochemical method was used for the synthesis of CdSe nanostructures, in the presence of surfactant and reductant. Effects of the type of the surfactant, ratio of Cd:surfactant, amount of reductant and time reaction was investigated on the morphology, particle size and properties of the products. XRD pattern, SEM and TEM images and PL spectrum were used for the characterization of the products. XRD results showed that product is CdSe. With increases in the concentration of hydrazine, the crystallinity of the products was increased and with the elongation of reaction time, the crystallinity was decreased. With the exchange of TGA to CTAB, the crystallinity was decreased. In the presence of TGA, agglomerated particles were formed. When CTAB was used, products were nanoparticles with nearly even distribution, average diameter of nanoparticles was about 50 nm. SDBS is not a good surfactant in the current experiment. When SDS was used, the products were in nano-size. PL spectrum of CdSe showed that emission maximum of CdSe is located at 549.5 nm, that a blue shift is observed comparing with bulk CdSe].

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