本文制备并表征了Au/CdS几何结构的纳米簇复合物.TEM和尺寸分布图显示,Au颗粒和CdS颗粒的平均粒径分别为6 nm和8 nm,Au/CdS粒径分布较窄且分散性较好,平均粒径19 nm.这种核壳结构纳米复合颗粒和单CdS颗粒一样,在485 nm和543 nm有两处发射峰.从UV-Vis上观察到,CdS的吸收边在470 nm,Au/CdS的吸收谱线上Au的吸收峰消失,吸收边相对于单CdS出现蓝移.
Composite nanoparticles of gold and CdS with core/shell geometry have been synthesized by.electrostatic interaction and characterized in this paper. As is shown in the TEM and the size distributiondiagram, the average diameters of Au, CdS and Au/CdS nanoparticles are 6 nm, 8 nm and 19 nmrespectively, and Au/CdS nanoparticles exhibit relatively narrow size distribution and fine dispersity.Like CdS nanoparticles, this kind of nanocomposites also show two peak positions at 485 nm and 543 nm.As we can see from the UV-Vis absorption spectra, blue shift appears on the absorption onset of Au/CdScompared with that of CdS nanoparticles(470 nm), and the SPR peak disappears at about 552 nm of Auin the absorption spectra of Au/CdS nanoparticles.
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