2000•Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIERequires access
Preparation and properties of scratch-resistant nanoporous broadband AR silica films derived by a two-step catalytic sol-gel process
Guangming Wu, Jue Wang, Shen Jun, Tianhe Yang, Qinyuan Zhang, Bin Zhou, Zhongsheng Deng, Bin Fan, Dongping Zhou, Fengshan Zhang
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Abstract
A new method to strengthen nano porous broadband anti- reflectance silica films is described. Silica sols were made from TEOS with a base/acid two-step catalytic process. Properties of silica films deposited with a dip-coat method are characterized with AFM, SEM, spectrophotometer and abrasion test. Experimental results show that an average reflectance of a glass coated with the nano porous silica films is less than 1% in the visible region; and that the two-step catalysis obviously strengthens the films. Finally, the strengthening mechanism of the films is discussed.