Nguyen Tat Thanh Institute of Hi-Technology, Nguyen Tat Thanh University, Ho Chi Minh City, 702000, Vietnam.
Hochiminh City University of Natural Resources and Environment, Ho Chi Minh City, 705000, Vietnam.
J Nanosci Nanotechnol. 2019 Feb 1;19(2):1192-1195. doi: 10.1166/jnn.2019.15924.
Glutathione (GSH) functionalized CdSe quantum dots (QDs) (GSH--CdSe QDs) were prepared via a simple one-pot strategy at low temperature. The as-synthesized CdSe QDs were characterized by FT-IR and XPS analyses. The morphology, physical structure and size distribution of GSH--CdSe QDs were investigated by TEM, XRD and DLS analyses, respectively. The GSH--CdSe QDs exhibited excellent stability of optical properties as investigated by UV-Vis absorption and photoluminescence (PL) spectroscopy. The high affinity of GSH towards heavy metal ions made the GSH--CdSe QDs quite susceptible to Pb ion which poses serious threat to the health and environment. The PL intensity of GSH--CdSe QDs was observed to be apparently quenched in the presence of Pb ions in aqueous solution rendering their potentialities as a sensor for detection of toxic heavy metal ions.
谷胱甘肽（GSH）功能化的 CdSe 量子点（QDs）（GSH-CdSe QDs）是通过低温下的简单一锅法制备的。所合成的 CdSe QDs 通过傅里叶变换红外光谱（FT-IR）和 X 射线光电子能谱（XPS）分析进行了表征。通过透射电子显微镜（TEM）、X 射线衍射（XRD）和动态光散射（DLS）分析分别研究了 GSH-CdSe QDs 的形态、物理结构和尺寸分布。通过紫外-可见吸收和光致发光（PL）光谱研究，GSH-CdSe QDs 表现出优异的光学性质稳定性。GSH 对重金属离子的高亲和力使得 GSH-CdSe QDs 对铅离子非常敏感，而铅离子对健康和环境构成严重威胁。在水溶液中存在 Pb 离子时，GSH-CdSe QDs 的 PL 强度明显被猝灭，这使得它们有可能成为检测有毒重金属离子的传感器。
