Novel growth of CuO-functionalized, branched SnO2 nanowires and their application to H2S sensors

被引：33

作者：

Kim, Sang Sub ^{[1
]}

Na, Han Gil ^{[2
]}

Choi, Sun-Woo ^{[1
]}

Kwak, Dong Sub ^{[2
]}

Kim, Hyoun Woo ^{[2
]}

机构：

[1] Inha Univ, Sch Mat Sci & Engn, Inchon 402751, South Korea

[2] Hanyang Univ, Div Engn & Mat Sci, Seoul 133791, South Korea

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2012年 / 45卷 / 20期

基金：

新加坡国家研究基金会;

关键词：

SOLUTION-BASED STRAIGHT; SENSITIZED SOLAR-CELLS; ZNO NANOWIRES; GAS SENSORS; FABRICATION; NANOPARTICLES; FILMS; CDS;

D O I：

10.1088/0022-3727/45/20/205301

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A novel growth method for CuO-functionalized, branched tin oxide (SnO2) nanowires was developed on the basis of a Cu-triggered tip-growth vapour-liquid-solid (VLS) process during annealing of Cu-coated SnO2 nanowires. The variation in annealing temperature changed the morphology, in which higher temperatures (>= 500 degrees C) are favourable for the formation of branches. From the observation of tip nanoparticles, we revealed that the growth of branches at 500 and 700 degrees C was dominated by base-growth and tip-growth VLS processes, respectively. The tip nanoparticles at 700 degrees C were mainly comprised of a CuO phase. We have demonstrated the potential applicability of the CuO-functionalized, branched SnO2 nanowires to H2S sensors. CuO functionalization significantly enhanced the response to H2S. In sharp contrast, it degraded the response to NO2, suggesting their selective sensing performance to H2S.

引用

页数：8

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