Lei Yun, Jiang Chengying, Liu Shuangjiang, Miao Yanming, Zou Bingsuo
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, PR China.
J Nanosci Nanotechnol. 2006 Dec;6(12):3784-8. doi: 10.1166/jnn.2006.613.
The thiol-capped CdTe nanocrystals were obtained by a clean chemical approach with hydrazine hydrate. In alkaline aqueous solution, hydrazine hydrate reduced commercial tellurium to be active reactant, and further reduced to negative bivalent telluride for the preparation of CdTe nanocrystals. The resulting CdTe nanocrystals were characterized by UV-Vis absorption spectra, photoluminescence spectra, X-ray diffraction, and high-resolution transmission electron microscopy. The synthesized CdTe nanocrystals were stable with relatively strong photoluminescence in neutral and close neutral range, and further combined with living Corynebacterium glutamicum without any post-preparative treatment. The conjugation samples were observed on laser confocal microscope, and the photoluminescence signals can only be detected at the positions of Corynebacterium glutamicum, which suggests that the CdTe nanocrystals have been combined with Corynebacterium glutamicum successfully.
通过水合肼的清洁化学方法获得了巯基封端的碲化镉纳米晶体。在碱性水溶液中，水合肼将市售碲还原为活性反应物，并进一步还原为负二价碲化物以制备碲化镉纳米晶体。通过紫外可见吸收光谱、光致发光光谱、X射线衍射和高分辨率透射电子显微镜对所得碲化镉纳米晶体进行了表征。合成的碲化镉纳米晶体在中性和近中性范围内稳定且具有相对较强的光致发光，并且无需任何后处理就可进一步与活的谷氨酸棒杆菌结合。在激光共聚焦显微镜下观察共轭样品，仅在谷氨酸棒杆菌的位置检测到光致发光信号，这表明碲化镉纳米晶体已成功与谷氨酸棒杆菌结合。
