利用水相CdTe纳米晶体轻松制备和表征高荧光聚合物复合微球。

Easy preparation and characterization of highly fluorescent polymer composite microspheres from aqueous CdTe nanocrystals.

作者信息

Li Minjie, Zhang Hao, Zhang Junhu, Wang Chunlei, Han Kun, Yang Bai

机构信息

Key Lab for Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.

出版信息

J Colloid Interface Sci. 2006 Aug 15;300(2):564-8. doi: 10.1016/j.jcis.2006.04.031. Epub 2006 May 12.

DOI:10.1016/j.jcis.2006.04.031

PMID:16697392

Abstract

Fluorescent microspheres were easily fabricated from aqueous CdTe nanocrystals (NCs). The NCs, which had negative charges on the surface, were first extracted to chloroform by cationic surfactant octadecyl-p-vinyl-benzyldimethylammonium chloride (OVDAC) and then swollen into performed polystyrene (PS) microspheres. Through this method, strong photoluminescence (PL) of aqueous NCs was inherited in the resultant composite microspheres. Moreover, the NCs were firmly stabilized in the microspheres, withstanding not only polar solvents but also nonpolar solvents. UV-vis spectrum, PL spectrum, TEM, and confocal fluorescence microscopy were used to characterize the product.

摘要

荧光微球可轻松由水性碲化镉纳米晶体（NCs）制备而成。表面带负电荷的纳米晶体首先通过阳离子表面活性剂十八烷基对乙烯基苄基二甲基氯化铵（OVDAC）萃取至氯仿中，然后溶胀到预制的聚苯乙烯（PS）微球中。通过这种方法，水性纳米晶体的强光致发光（PL）特性被继承到所得的复合微球中。此外，纳米晶体在微球中得到了牢固的稳定，不仅能耐受极性溶剂，还能耐受非极性溶剂。利用紫外可见光谱、光致发光光谱、透射电子显微镜和共聚焦荧光显微镜对产物进行了表征。