Samal Monica, Mohapatra Priya Ranjan, Yun Kyu Sik
J Nanosci Nanotechnol. 2015 Sep;15(9):6779-83. doi: 10.1166/jnn.2015.16774.
A diblock copolymer poly(2-vinyl pyridine)-b-poly(n-hexyl isocyanate) (P2VP-b-PHIC) is used for the present study. It has two blocks; a rod-shaped PHIC block that adopts a helical conformation, and a coil shaped P2VP block. In a polar solvent such as THF both PHIC and P2VP blocks are soluble. In mixtures of two solvents, such as THF and methanol, while the solubility of P2VP component is augmented that of PHIC is decreased leading to formation of reversed micelles. The pyridine nitrogen in P2VP block is a reactive site. It forms complexes with a suitable metal ion, such as Cd2+. The micelle is employed as a nanoreactor for synthesis of CdS quantum dot (QD). In this paper, the micellization behaviour of the copolymer and the use of the micelles for synthesis and controlled growth of CdS nanocrystals are demonstrated.
本研究使用了一种二嵌段共聚物聚（2-乙烯基吡啶）-b-聚（正己基异氰酸酯）（P2VP-b-PHIC）。它有两个嵌段：一个呈螺旋构象的棒状PHIC嵌段和一个线圈状的P2VP嵌段。在诸如四氢呋喃（THF）这样的极性溶剂中，PHIC和P2VP嵌段都可溶。在两种溶剂的混合物中，如THF和甲醇，虽然P2VP组分的溶解度增加，但PHIC的溶解度降低，导致形成反胶束。P2VP嵌段中的吡啶氮是一个反应位点。它与合适的金属离子，如Cd2+形成络合物。该胶束被用作合成硫化镉量子点（QD）的纳米反应器。本文展示了该共聚物的胶束化行为以及胶束在硫化镉纳米晶体合成和可控生长中的应用。
