writer：Yun He, Yan Zhang, Nan Yan, Yutian Zhu, Wei Jiang, Dean Shi
keywords：嵌段共聚物, 筛状粒子, 开关通道, 受限自组装, 金纳米粒子, 支架
source：期刊
specific source：Nanoscale, 2017, 9(39), 15056-15061
Issue time：2017年

摘要：具有可控形状、内部纳米结构以及刺激响应功能的规整聚合物粒子因在众多领域的巨大潜力而受到广泛关注。本文通过聚4-乙烯基吡啶-b-聚苯乙烯-b-聚4-乙烯基吡啶（P4VP-b-PS-b-P4VP）三嵌段共聚物在乳液液滴内的受限自组装，并在乙醇中溶胀处理，制备了具有晶格排列开关通道的独特筛状粒子。值得注意的是，筛状粒子中六角排列的P4VP通道可通过改变溶剂类型实现开关，即在乙醇中通道开启，在水中通道关闭，可作为溶剂控制的化学门。此外，规整的筛状粒子还可作为支架，引导金纳米粒子的空间排列。

Abstract：Well-defined polymeric particles with not only the controllable shape and internal nanostructures but also the stimuli-responsive functions have attracted intensive attention because of their great potentials in various fields. Here, unique sieve-like particles with lattice arrayed switchable channels were created via the confined self-assembly of poly(4-vinylpyridine)-b-polystyrene-b-poly(4-vinylpyridine) (P4VP-b-PS-b-P4VP) triblock copolymers within emulsion droplets and the subsequent swelling treatment in ethanol. It is worth noting that the hexagonally packed P4VP channels in the sieve-like particles are switched on and off by changing the solvent type, i.e., P4VP channels are switched on in ethanol and switched off in water, which can operate as a solvent-controlled chemical gate. Moreover, the well-defined sieve-like particles can be further used as the scaffolds to guide the spatial arrangement of the gold nanoparticles.

论文链接：https://doi.org/10.1039/c7nr04923d