Large area assembly of patterned nanoparticles by a polydimethylsiloxane template

利用硅橡胶模板进行纳米粒子的大面积图形化组装（英文）

A technique in which a polydimethylsiloxane(PDMS) template is used to assemble silicon oxide nanoparticles is proposed herein. The PDMS substrate was first constructed in a series of casting steps and a copper mask was then made with a laser marking system. Silicon oxide nanoparticles were generated by a modified Stober method. A PDMS substrate covered by the copper mask was then coated with a metal Au layer via sputtering to form the PDMS template. Finally, the silicon oxide nanoparticles were spin-coated on the PDMS template. Because the PDMS template consists of highly hydrophobic PDMS and less hydrophilic Au patterns, the nanoparticles undergo a dual dewetting process on the PDMS template to form an annular distribution around the borders of the Au patterns.

本文提出了一种利用硅橡胶模板对二氧化硅纳米粒子进行图形化组装的方法.首先,采用浇筑法制备了硅橡胶基底并通过激光打标机加工制备了铜掩膜板,然后对覆盖铜掩膜板后的硅橡胶基底进行金属金的溅射以得到硅橡胶模板.二氧化硅纳米粒子采用改进的Stober方法制备,然后采用离心旋涂方式涂覆到硅橡胶模板表面.由于硅橡胶模板表面具有图形化的亲水和疏水区域,而且金表面的皱化也具有不同的亲水性,纳米粒子将经历两次去湿过程,最终围绕金图形化区域形成环状分布.