Abstract：In the present work, CdS quantum dots (QDs) were successfully biosynthesized at room temperature by using saccharomyces cerevisiae yeast as a carrier. Fluorescence emission spectra, ultraviolet-visible (UV/Vis) absorption spectra, and inverted fluorescence microscope images confirmed that saccharomyces cerevisiae can be used to biosynthesize CdS QDs. The as-prepared CdS QDs show the fluorescence emission peak at 443 nm and emit blue-green fluorescence under UV light (with excitation at 365 nm). Transmission electron microscopy (TEM) was applied to characterize the as-prepared CdS QDs and the TEM results showed that the as-prepared CdS QDs had the structure of hexagonal wurtzite. Fluorescence emission spectrum and UV/Vis absorption spectrum were used as the performance indicatiors to study the effects of saccharomyces cerevisiae yeast incubation times, reactant Cd2+ concentrations and reaction times on CdS QDs synthesis. Saccharomyces cerevisiae yeast grown in early stable phase can get the highest fluorescence intensity of CdS QDs when they were co-cultured with 0.5 mmol·L-1 of Cd2+ with 24 h incubation time. Furthermore, much more CdS QDs can be obtained by changing the culture medium during the synthesis process.
黄淮青，何明欣，王文星，刘金玲，密丛丛，徐淑坤* . CdS量子点的酿酒酵母仿生合成及光谱表征[J]. 光谱学与光谱分析, 2012, 32(04): 1090-1093.
HUANG Huai-qing, HE Ming-xin, WANG Wen-xing, LIU Jin-ling, MI Cong-cong, XU Shu-kun* . Biosynthesis of CdS Quantum Dots in Saccharomyces Cerevisiae and Spectroscopic Characterization. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(04): 1090-1093.
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