Antireflective silica thin films with super water repellence via a solgel process

作者：Xu, Y^*; Fan, WH; Li, ZH; Wu, D; Sun, YH

来源：Applied Optics, 2003, 42(1): 108-112.

DOI：10.1364/AO.42.000108

• AL2O3 COATING FILMS
• GEL METHOD
• HIGH TRANSPARENCY
• GLASS

A solgel process was developed, through which silica films possessing both high antireflection and super water repellence were obtained. In this process, methyl-modified SiO2 sols synthesized by colloidal suspension of SiO2 particles and hexamethyldisilazane (HMDS) were used to deposit spinning-coating films on optical glass substrates. On the resultant films the contact angle for water increased with the increasing amount of HMDS in the reaction mixture. The biggest contact angle was 165degrees, and the lowest reflectivity on one-sided film reached 0.03%. The antireflections were high all the while. One advantage of this process is that neither a roughened surface nor fluoroalkyltrialkoxylsilaue (FAS) is needed to obtained super water repellence.

• 出版日期2003-1-1
• 单位中国科学院; 煤转化国家重点实验室; 中国科学院山西煤炭化学研究所