Pt- and Pd-nanoclusters functionalized carbon nanotubes networked films for sub-ppm gas sensors

被引：110

作者：

Penza, M. ^{[1
]}

Rossi, R. ^{[1
]}

Alvisi, M. ^{[1
]}

Cassano, G. ^{[1
]}

Signore, M. A. ^{[1
]}

Serra, E. ^{[2
]}

Giorgi, R. ^{[2
]}

机构：

[1] ENEA, Dept Phys Technol & New Mat, I-72100 Brindisi, Italy

[2] ENEA, Dept Phys Technol & New Mat, I-00060 Rome, Italy

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2008年 / 135卷 / 01期

关键词：

Carbon nanotubes; CNTs functionalizations; Pd- and Pt-nanoclusters; Gas sensors; Sensor electronic interface;

D O I：

10.1016/j.snb.2008.08.024

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A gas chemiresistor, fabricated onto alumina using multi-walled carbon nanotubes (MWCNTs) networked films grown by radiofrequency plasma enhanced chemical vapor deposition (RF-PECVD) technology, is described for high-performance gas detection, at an operating temperature of 200 degrees C. Functionalizations of MWCNTs tangled bundle-films with nominally 5-nm thick Pt- and Pd-nanoclusters, prepared by magnetron Sputtering, provide higher sensitivity for significantly enhanced gas detection of NO2, H2S, NH3. CO, up to a low limit of sub-ppm level. The measured electrical conductance of the functionalized MWCNTs upon gas exposures is modulated by charge transfer with p-type semiconducting characteristics. Pt- and Pd-nanoclusters functionalized MWCNTs gas sensors exhibited better performances compared to unfunctionalized MWCNTs, making them promising candidates for air-pollutants environmental monitoring. Simple electronic interface for the chemiresistor has been developed with a voltage output of the sensor signal. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：289 / 297

页数：9

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