Polymer-modified opal nanopores.
Polymer-modified opal nanopores.
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DOI：
10.1021/la061170d
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发表时间：
2006-08
期刊：
影响因子：
--
通讯作者：
Olga Schepelina;I. Zharov
中科院分区：
文献类型：
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作者：
Olga Schepelina;I. Zharov
采用表面引发原子转移自由基聚合的方法，用聚丙烯酰胺刷对由205 nm硅球组装而成的蛋白石纳米膜表面进行了修饰。胶体晶格不受聚合作用的干扰。聚合物刷厚度由聚合时间控制，并通过循环伏安法测量氧化还原物质在蛋白石膜上的通量来监测聚合物刷厚度。根据极限电流的变化计算了纳米孔尺寸和聚合物电刷厚度。聚合物刷厚度在26 h的聚合过程中以对数方式从1.3 nm增加到8.5 nm，导致纳米孔小至7.5 nm。
The surface of nanopores in opal films, assembled from 205 nm silica spheres, was modified with poly(acrylamide) brushes using surface-initiated atom transfer radical polymerization. The colloidal crystal lattice remained unperturbed by the polymerization. The polymer brush thickness was controlled by polymerization time and was monitored by measuring the flux of redox species across the opal film using cyclic voltammetry. The nanopore size and polymer brush thickness were calculated on the basis of the limiting current change. Polymer brush thickness increased over the course of 26 h of polymerization in a logarithmic manner from 1.3 to 8.5 nm, leading to nanopores as small as 7.5 nm.