Koh Haeng-Deog, Changez Mohammad, Lee Jae-Suk
Department of Materials Science and Engineering, Department of Nanobio Materials and Electronics, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-gwagiro (Oryong-dong), Buk-gu, Gwangju 500-712, Korea.
Macromol Rapid Commun. 2010 Oct 18;31(20):1798-804. doi: 10.1002/marc.201000214.
A polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) micellar structure with a P2VP core containing 5 nm CdS nanoparticles (NPs) and a PS shell formed in toluene that is a good solvent for PS block undergoes the core-shell inversion by excess addition of methanol that is a good solvent for P2VP block. It leads to the formation of micellar shell-embedded CdS NPs in the methanol major phase. The spontaneous crystalline growth of Au NPs on the CdS surfaces positioned at micellar shells without a further reduction process is newly demonstrated. The nanostructure of Au/CdS/PS-b-P2VP hybrid NPs is confirmed by transmission electron microscopy, energy-dispersive X-ray, and UV-Vis absorption.
一种聚苯乙烯-嵌段-聚（2-乙烯基吡啶）（PS-b-P2VP）胶束结构，其P2VP核中含有5纳米的硫化镉纳米颗粒（NPs），PS壳层在甲苯中形成，甲苯是PS嵌段的良溶剂，通过过量添加甲醇（P2VP嵌段的良溶剂）会发生核壳反转。这导致在甲醇主相中形成胶束壳层嵌入的硫化镉纳米颗粒。首次证明了金纳米颗粒在位于胶束壳层的硫化镉表面上自发结晶生长，无需进一步还原过程。通过透射电子显微镜、能量色散X射线和紫外-可见吸收对金/硫化镉/PS-b-P2VP杂化纳米颗粒的纳米结构进行了确认。
