Sensitive Room Temperature Photoluminescence-Based Sensing of H2S with Novel CuO–ZnO Nanorods

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• 作者：Xiao Liu ; Baosheng Du ; Ye Sun ; Miao Yu ; Yongqi Yin ; Wei Tang ; Chong Chen ; Lei Sun ; Bin Yang ; Wenwu Cao ; Michael N. R. Ashfold
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：June 29, 2016
• 年：2016
• 卷：8
• 期：25
• 页码：16379-16385
• 全文大小：411K
• 年卷期：0
• ISSN：1944-8252

文摘

Novel CuO nanoparticle-capped ZnO nanorods have been produced using a pulsed laser deposition (PLD) method. These nanorods are shown to grow by a CuO–nanoparticle-assisted vapor–solid–solid (V–S–S) mechanism. The photoluminescence (PL) accompanying ultraviolet illumination of these capped nanorod samples shows large variations upon exposure to trace quantities of H₂S gas. The present data suggest that both the Cu-doped ZnO stem and the CuO capping nanoparticle contribute to optical H₂S sensing with these CuO–ZnO nanorods. This study represents the first demonstration of PL-based H₂S gas sensing, at room temperature, with sub-ppm sensitivity. It also opens the way to producing CuO–ZnO nanorods by a V-S-S mechanism using gas-phase methods other than PLD.