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Well-organized structures of ZnS semiconductor nanocrystals using amphiphilic triblock copolymer aggregates as templates

机译:以两亲三嵌段共聚物聚集体为模板的ZnS半导体纳米晶体的组织良好的结构

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摘要

Ring- and rod-shaped P4VP-b-PS-b-P4VP ( PS, polystyrene; P4VP, poly( 4-vinylpyridine)) triblock copolymer aggregates are used as templates to synthesize ZnS nanocrystals. Herein, PVP serves as both a stabilizing agent and a structure- directing agent. The resulting ZnS nanocrystals could be aligned along the corona of the copolymer aggregates in near-perfect structures through control of both the molar ratio of Zn2+ to P4VP and the reaction time. The diameter of the as-synthesized ZnS layer on the surface of polymer template is approximate 2 - 3 nm. High-resolution transmission electron microscopy images reveal that the ZnS particles are single crystal in a zinc blende structure. This method provides a simple, reproducible route at room temperature to prepare assembled hybrid polymer - semiconductor nanocrystal nanocomposites.
机译:环状和棒状的P4VP-b-PS-b-P4VP(PS,聚苯乙烯; P4VP,聚(4-乙烯基吡啶))三嵌段共聚物聚集体用作模板来合成ZnS纳米晶体。在本文中,PVP既充当稳定剂又充当结构导向剂。通过控制Zn2 +与P4VP的摩尔比和反应时间,可以使所得的ZnS纳米晶体沿着共聚物聚集体的电晕排列成近乎完美的结构。聚合物模板表面上合成后的ZnS层的直径约为2-3 nm。高分辨率透射电子显微镜图像显示,ZnS颗粒为锌共混物结构中的单晶。该方法提供了在室温下制备组装的杂化聚合物-半导体纳米晶体纳米复合材料的简单,可重复的途径。

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