水溶性ZnSe纳米晶的微波制备与表征(英文)

Microwave-assisted growth and characterizations of water-dispersed glutathione-capped ZnSe nanocrystals

本文利用微波辐射方法,在水相中直接快速制备,得到了谷胱甘肽修饰的水溶性ZnSe纳米晶,并详细讨论了制备条件(溶液中离子配比、PH值、反应温度和时间等)对结果的影响。在最佳条件下制备所得的ZnSe纳米晶,发射波长在360nm^410nm之间可调,荧光光谱半峰宽最小值可达到21nm。另外,进一步利用光辐射方法,对ZnSe纳米晶进行表面修饰,将其荧光量子效率提高到了55%。本文制备方法具有过程简单、经济的优点,此外,这种水溶性ZnSe纳米晶具有优良的光谱性能和良好的生物相溶性,可使其作为荧光探针进一步应用在生物领域。

In this paper, a novel method is presented for the rapid synthesis of glutathione （GSH） - capped ZnSe nanocrystals in aqueous phase assisted with microwave irradiation. The as - prepared ZnSe nanocrystals have tunable fluorescence emissions between 360 and 410 nm with narrow full width at half maximum （FWHM）of 21 nm. Moreover, the luminescent properties were greatly improved through photo- chemical treatment. Their photoluminescence quantum yields （PLQY） reached as high as 55% after illumination. The key synthesis parameters （molar ratio of reagents, pH values, reaction temperature, and time） are fully discussed. The facile synthesis of glutathione - capped ZnSe nanocrystals is free of complicated manipulations and cost - effective. Furthermore, the water - dispersed ZnSe nanocrystals with high luminescence and favorable biocompatibility allow their potential applications in biological imaging as fluorescent labels.