Space control and catalysis function of gold claster syncesis in nano-reactors of micro-phase separation structure formed by block copolymer

以两亲双嵌段共聚物PEO-b-PMA(Az)为反应容器，在纳米柱体中还原金离子，得到尺寸和二维取向可控的金纳米粒子。在PEO-b-PMA(Az)薄膜的微相分离结构中，PEO纳米圆柱体垂直于硅片表面排列。通过优化聚氧化乙烯纳米柱中的金离子掺杂和还原条件，在聚氧化乙烯纳米柱的上部位置获得了尺寸可控的金纳米颗粒。纳米金颗粒的直径取决于用于还原反应的聚氧化乙烯圆柱体的直径。金纳米粒子的尺寸在3.2~4 nm之间。

The size and two-dimensional alignment controlled gold nano-particles were successively obtained by the reduction of gold ions in the nano-cylinders of amphiphilic di-block copolymer, PEO-b-PMA(Az), as nano-reactor vessels. In the micro phase separation structure of PEO-b-PMA(Az) thin film, PEO nano-cylinders aligned normal to the silicon wafer surface. By optimization of gold ion doping in PEO nano-cylinders and reduction conditions, the size controlled gold nano-particles were obtained at the upper site of PEO nano-cylinders. The diameter of gold nano-particles depended on the diameter of PEO cylinder used for the reduction reaction. The size of gold nano-particles were from 3.2 to 4 nm.