State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
J Colloid Interface Sci. 2010 Feb 15;342(2):278-82. doi: 10.1016/j.jcis.2009.10.061. Epub 2009 Oct 29.
Multicolored water-soluble fluorescent CdTe quantum dots (QDs) have been synthesized by using Te, NaBH(4), and CdCl(2) as precursors and several mercapto-based compounds as modifiers. The effects of ratio of the precursor, type of modifier, refluxing time and initial pH value of the reaction on fluorescence intensity of CdTe QDs have been studied. XRD, HRTEM and fluorescence spectra were employed to characterize these samples. It is found that CdTe QDs with a crystalline size of 3-4nm are homogeneously embedded in the organic matrix. The maximum fluorescence emission peaks of CdTe QDs solutions shifted from 525nm to 591nm according to the refluxing time. The fingerprint details on the surface of smooth objects were clearly developed with CdTe QDs solution under irradiation of UV lights.
多色水溶性荧光 CdTe 量子点（QDs）已通过使用 Te、NaBH(4) 和 CdCl(2) 作为前体和几种巯基化合物作为修饰剂合成。研究了前体比、修饰剂类型、回流时间和反应初始 pH 值对 CdTe QDs 荧光强度的影响。XRD、HRTEM 和荧光光谱用于表征这些样品。结果发现，尺寸为 3-4nm 的 CdTe QDs 均匀地嵌入在有机基质中。CdTe QDs 溶液的最大荧光发射峰随着回流时间从 525nm 移动到 591nm。在紫外光照射下，CdTe QDs 溶液可清晰地显示出光滑物体表面的指纹细节。
