Highly sensitive and selective triethylamine-sensing properties of nanosheets directly grown on ceramic tube by forming NiO/ZnO PN heterojunction
Highly sensitive and selective triethylamine-sensing properties of nanosheets directly grown on ceramic tube by forming NiO/ZnO PN heterojunction
复制标题
通过形成 NiO/ZnO PN 异质结直接在陶瓷管上生长纳米片的高灵敏度和选择性三乙胺传感特性
DOI：
10.1016/j.snb.2014.04.029
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发表时间：
2014-09-01
影响因子：
8.4
通讯作者：
Cao, Bingqiang
中科院分区：
文献类型：
--
作者：
Ju, Dianxing;Xu, Hongyan;Cao, Bingqiang
具有高灵敏度、高选择性和高可靠性的化学电阻式气体传感器已被广泛应用。通过设计由ZnO纳米片和NiO纳米颗粒组成的PN异质结，成功地制备了高灵敏度和高选择性的纳米结构三乙胺（TEA）气敏元件。通过引入种子层，采用简单、经济的水热法在Al 2 O3陶瓷管上直接生长ZnO纳米片。采用脉冲激光沉积（PLD）方法，NiO/ZnO PN结的结构具有高度的可控性和可重复性。与ZnO纳米片相比，NiO/ZnO纳米颗粒/纳米片异质结对TEA气体具有更好的敏感性能。NiO/ZnO传感器中PN结界面处形成的耗尽层可使传感器在空气中的电阻显著增加，在TEA气体中的电阻显著降低。由于其工作原理的一般性和可控生长策略，本研究为高性能化学电阻式气敏元件的设计和制备提供了一条途径。(C)2014爱思唯尔有限公司版权所有。
Chemiresistive gas sensors with high sensitivity, selectivity and reliable fabrication potency for specific gas have been now expected for many applications. A highly sensitive and selective nanostructured triethylamine (TEA) gas sensor has been fabricated successfully by designing PN heterojunction consisting of ZnO nanosheets and NiO nanoparticles. The ZnO nanosheets directly grew on Al2O3 ceramic tubes by introducing a seed layer with a simple and cost-effective hydrothermal method. By employing pulsed laser deposition (PLD) method, the construction of NiO/ZnO PN heterojunction is highly controllable and reproducible. In comparison with ZnO nanosheet, the NiO/ZnO nanoparticle/nanosheet heterojunction exhibits much better sensing property to TEA gas. The depletion layer formed at the PN junction interface in NiO/ZnO sensor can greatly increase the resistance in air and decrease the resistance in TEA gas. Due to the general working principle and controllable growth strategy, this study provides a way for design and fabrication of the chemiresistive gas sensors with high performance. (C) 2014 Elsevier B.V. All rights reserved.