Hydrogen activity tuning of Pt-doped WO₃ photonic crystal

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• 作者：Zhuoying Xie^a ; Hua Xu^a ; Fei Rong^b ; Liguo Sun^a ; Shengzi Zhang^a ; Zhong-Ze Gu^a ; ^{gu@seu.edu.cn}
• 关键词：Hydrogen gas sensor ; Tungsten trioxide ; Inverse opal ; Photonic crystal
• 刊名：Thin Solid Films
• 出版年：2012
• 期刊代码：78_00406090
• 类别：ph
• 出版时间：30 March, 2012
• 卷：520
• 期：11
• 页码：4063-4067
• 文件大小：739 K

摘要

A photonic crystal responsive to H₂ has been fabricated by replicating polystyrene colloidal crystal template with WO₃ sol-gel, followed with subsequent Pt sputter-deposition. Under H₂ stimulation, the reflection peak of the photonic crystal rapidly shifted to short wavelength and its intensity declined accordingly. The reflection peak returned to its original location after exposure to oxygen atmosphere. The Pt-WO₃ photonic crystal also exhibited excellent, tunable optical performance with high sensitivity to hydrogen in the range of 100%to 0.1%.