Finite size effect on hydrogen gas sensing performance in single Pd nanowires

被引：41

作者：

Jeon, Kye Jin ^{[1
]}

Jeun, Minhong ^{[1
]}

Lee, Eunsongyi ^{[1
]}

Lee, Jun Min ^{[1
]}

Lee, Kyoung-Il ^{[1
]}

von Allmen, Paul ^{[2
]}

Lee, Wooyoung ^{[1
]}

机构：

[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea

[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

来源：

NANOTECHNOLOGY | 2008年 / 19卷 / 49期

关键词：

D O I：

10.1088/0957-4484/19/49/495501

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We present the hydrogen sensing performance of individual Pd nanowires grown by electrodeposition into nanochannels of anodized aluminum oxide (AAO) templates investigated as a function of the nanowire diameter. Four-terminal devices based on individual Pd nanowires were found to successfully detect hydrogen gas (H-2). Our experimental results show that the H2 sensing sensitivity increases and the response time decreases with decreasing diameter of Pd nanowires with d = 400, 200, 80 and 20 nm, due to the high surface-to-volume ratio and short diffusion paths, respectively. This is in qualitatively good agreement with simulated results obtained from a theoretical model based on a combination of the rate equation and diffusion equation.

引用

页数：6

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