Room temperature methane detection using palladium loaded single-walled carbon nanotube sensors

被引：272

作者：

Lu, YJ ^{[1
]}

Li, J ^{[1
]}

Han, J ^{[1
]}

Ng, HT ^{[1
]}

Binder, C ^{[1
]}

Partridge, C ^{[1
]}

Meyyappan, M ^{[1
]}

机构：

[1] NASA, Ames Res Ctr, Ctr Nanotechnol, Moffett Field, CA 94035 USA

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 391卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2004.05.029

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Single-walled carbon nanotubes (SWNTs) loaded with palladium (Pd) nanoparticles are used for detection of methane ranging from 6 to 100 ppm in air at room temperature. The Pd-SWNT nanosensors show advantages over conventional catalytic beads and metal oxide sensors for methane detection in terms of reduced size and power consumption by a factor of 100 and sensitivity by a factor of 10. A charge transfer sensing mechanism in which Pd attracts electrons from SWNTs to form a weakly bound complex Pddelta+(CH4)(delta-) is discussed. In addition, the elevated temperature and ultraviolet light effects on the sensor characteristics are also studied. (C) 2004 Published by Elsevier B.V.

引用

页码：344 / 348

页数：5

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