Sensors for inorganic vapor detection based on carbon nanotubes and poly(o-anisidine) nanocomposite material

被引：72

作者：

Valentini, L ^{[1
]}

Bavastrello, V

Stura, E

Armentano, I

Nicolini, C

Kenny, JM

机构：

[1] Univ Perugia, Ctr Mat Sci & Technol, INSTM Unit, I-05100 Terni, Italy

[2] Univ Genoa, Dept Biophys M&O Sci & Technol, I-16132 Genoa, Italy

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 383卷 / 5-6期

关键词：

D O I：

10.1016/j.cplett.2003.11.091

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：

A gas sensor, fabricated by selective growth of aligned carbon nanotubes (CNTs) by pulsed plasma on Si3N4/Si substrates patterned by metallic platinum, is presented for inorganic vapor detection at room temperature. Poly(o-anisidine) (POAS) deposition onto the CNTs device was shown to impart higher sensitivity to the sensor. Upon exposure to HCl the variation of the CNTs sensitivity is less than 4%, while the POAS-coated CNTs devices offer a higher sensitivity (i.e. 28%). The extended detection capability to inorganic vapors is attributed to direct charge transfer with electron hopping effects on intertube conductivity through physically adsorbed POAS between CNTs. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：617 / 622

页数：6

共 31 条

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