摘要
以N-乙酰基-L-半胱氨酸为稳定剂,采用控温控压微波辐射法在水溶液中快速合成了CdTe量子点。吸收光谱和荧光光谱表明所合成量子点具有优异的光学性能,量子产率最高可达50%左右,发射峰半峰宽最小在35nm左右,明显优于在相同实验条件下以3-巯基丙酸为稳定剂合成的CdTe量子点。透射电子镜显微镜(TEM)和X射线粉末衍射(XRD)进一步证实CdTe量子点具有较窄的粒径分布和好的晶体结构。电感耦合等离子体发射光谱(ICP-OES)分析表明量子点中重金属元素镉的含量随着荧光发射波长的增加而逐渐增大。
Highly luminescent quantum dots （QDs） capped with N-acetyl-L-cysteine was synthesized in aqueous solution by microwave irradiation with controllable temperature and pressure. Absorption and fluorescence spectra showed that the as-synthesized QDs possessed good optical properties. The highest quantum yield （QY） was up to 50% ,with the narrowest FWHM less than 35 nm,whieh was better than those prepared with 3-mereaptopropionic acid （MPA） as a stabilizer under the same experimental conditions. Transmission electron microscopy （TEM） and X-ray power diffraction distribution （ICP-OES） fluorescence （XRD） further confirmed that the as-prepared CdTe QDs possessed narrow size and good crystal structure. The inductively coupled plasma optical emission spectrometer analysis showed that the cadmium content in QDs increased with an increase in the emission wavelength.
出处
《光谱实验室》
CAS
2013年第2期561-566,共6页
Chinese Journal of Spectroscopy Laboratory
基金
国家自然科学基金(20905078)
国家质检总局科研项目(20121K209)
山东省自然科学基金(ZR2009BQ001)
关键词
生物分子
微波
荧光
量子点
镉含量
Biological Molecule
Microware
Fluorescence
Quantum Dots
Cadmium Content
