Enhanced NO2 sensing characteristics of Au modified porous silicon/thorn-sphere-like tungsten oxide composites
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- 作者：Lin Yuan ; Ming Hu ; huming@tju.edu.cn" class="auth_mail" title="E-mail the corresponding author ; yuanlin862@126.com" class="auth_mail" title="E-mail the corresponding author ; Yulong Wei ; Wenfeng Ma
- 关键词：Tungsten oxide ; Au modified PS ; Gas sensor ; Hierarchical structure ; Hydrothermal synthesis ; Heterointerface
- 刊名：Applied Surface Science
- 出版年：2016
- 出版时间：15 December 2016
- 年：2016
- 卷：389
- 期：Complete
- 页码：824-834
- 全文大小：4011 K
文摘
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The thorn-sphere-like WO3 is synthesized through hydrothermal method on the Au-decorated porous silicon (PS) substrates with seed-layer induction.
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The morphology of WO3 hierarchical nanostructure depends on the Au-sputtering time and hydrothermal reaction time.
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The results show excellent response characteristics at room temperature even to ppb-level NO2.
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The hierarchical nanostructure and heterostructure in the sensor play important roles on the enhanced NO2 response.