Self-assembly of block copolymers into sieve-like particles with arrayed switchable channels and as scaffolds to guide the arrangement of gold nanoparticles
Self-assembly of block copolymers into sieve-like particles with arrayed switchable channels and as scaffolds to guide the arrangement of gold nanoparticles
复制标题
嵌段共聚物自组装成具有阵列可切换通道的筛状颗粒，并作为支架引导金纳米颗粒的排列
DOI：
10.1039/c7nr04923d
复制
发表时间：
2017-10-21
期刊：
影响因子：
6.7
通讯作者：
Shi, Dean
中科院分区：
文献类型：
--
作者：
He, Yun;Zhang, Yan;Shi, Dean
具有可控形状和内部纳米结构的聚合物粒子，以及具有刺激响应功能的聚合物粒子，因其在各个领域的巨大潜力而引起人们的广泛关注。本文中，我们通过聚（4-乙烯基吡啶）-b-聚苯乙烯-b-聚（4-乙烯基吡啶）（P4 VP-b-PS-bP 4VP）三嵌段共聚物在乳液液滴内的受限自组装和随后的乙醇溶胀处理，产生了具有晶格排列的可切换通道的独特筛状颗粒。值得注意的是，通过改变溶剂类型，即，P4 VP通道在乙醇中打开，在水中关闭，可以作为溶剂控制的化学门。此外，明确定义的筛状颗粒可以进一步用作支架来引导金纳米颗粒的空间排列，这产生了具有可控形貌和有序空间排列的AuNPs的杂化纳米材料。
Well-defined polymeric particles with not only a controllable shape and internal nanostructures but also stimuli-responsive functions have attracted intensive attention because of their great potential in various fields. Herein, we created unique sieve-like particles with lattice arrayed switchable channels via the confined self-assembly of poly(4-vinylpyridine)-b-polystyrene-b-poly(4-vinylpyridine) (P4VP-b-PS-bP4VP) triblock copolymers within the 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 welldefined sieve-like particles can be further used as scaffolds to guide the spatial arrangement of gold nanoparticles, which generates hybrid nanomaterials with controllable morphology and ordered spatial arrangement of AuNPs.