One-dimensional CuO-SnO2 p-n heterojunctions for enhanced detection of H2S
One-dimensional CuO-SnO2 p-n heterojunctions for enhanced detection of H2S
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DOI：
10.1039/c3ta11867c
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Mathur, Sanjay
中科院分区：
文献类型：
--
作者：
Giebelhaus, Irina;Varechkina, Elena;Mathur, Sanjay
分别以Sn（OBut）（4）和[Cu-II（（C5 H4 N）（CHCOCF 3））（2）]（2）（1）为前驱体，采用化学气相沉积法合成了高结晶度的SnO 2纳米线，并将其与铜颗粒进行了功能化。控制Cu氧化为CuO导致形成CuO@SnO2 p-n异质结，发现其对H2S气体的检测具有高度灵敏度和选择性。电导的变化，当暴露于H2S气体是由于形成的硫化铜导致的空间电荷区域的收缩沿着的SnO 2纳米线和伴随的增加的导电性通道中的单个纳米线。
Highly crystalline SnO2 nanowires were synthesized and functionalized with copper particles in a CVD using Sn(OBut)(4) and [Cu-II((C5H4N)(CHCOCF3))(2)](2) (1) as precursors respectively. Controlled oxidation of Cu to CuO led to the formation of CuO@SnO2 p-n heterojunctions, which were found to be highly sensitive and selective towards the detection of H2S gas. The change in the conductance upon exposure to H2S gas was attributed to the formation of CuS resulting in the shrinkage of the space charge region along the SnO2 nanowire and a concomitant increase of the conductivity channel in an individual nanowire.