Size dependence of gas sensitivity of ZnO nanorods
Size dependence of gas sensitivity of ZnO nanorods
复制标题
ZnO 纳米棒气体敏感性的尺寸依赖性
DOI：
10.1021/jp065963k
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发表时间：
2007-02-08
影响因子：
3.7
通讯作者：
Zhang, W. F.
中科院分区：
文献类型：
--
作者：
Liao, L.;Lu, H. B.;Zhang, W. F.
我们报道了不同直径的ZnO纳米棒的结构、光学和气敏特性。垂直排列均匀的纳米棒生长沿着c轴取向。利用拉曼散射E2（高）模位移和光致发光（PL）谱研究了应力和氧空位对纳米棒直径的影响。制备气体传感器并测试其用于检测空气中的C2H5OH和H2S（100 ppm）。发现薄纳米棒具有比厚纳米棒显著更好的传感性能。我们从表面反应过程的传感机理方面提供了一种可能的解释。
We report the structure, optical, and gas-sensing properties of ZnO nanorods with different diameters. Vertically well-aligned homogeneous nanorods were grown along the c-axis orientation. The shift of Raman scattering E2 (high) mode and photoluminescence (PL) spectra were used to study the dependences of nanorod diameters on the stress and oxygen vacancy. Gas sensors were prepared and tested for the detection of C2H5OH and H2S (100 ppm) in air. It was found that the thin nanorods have a significantly better sensing performance than the thick nanorods. We provide a possible explanation from the aspect of the sensing mechanism of the surface reaction process.