Microwave Based Ammonia Detection with Vertically Aligned Carbon Nanotube Arrays

被引：7

作者：

McGrath, Mark ^{[1
]}

Pham, Anh-Vu H. ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Elect & Comp Engn, Davis, CA 95616 USA

来源：

SENSOR LETTERS | 2008年 / 6卷 / 05期

基金：

美国国家科学基金会;

关键词：

Vertically Aligned Carbon Nanotubes; Sensor; Wireless and Ammonia;

D O I：

10.1166/sl.2008.m142

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We present the results of a microwave based sensor with a vertically grown multi-walled nanotube array as sensing materials. The sensitivity is measured to be -2.5 KHz/ppm for ammonia concentrations of 1000 ppm in an ambient environment. The frequency shift mechanism is explained.

引用

页码：719 / 722

页数：4

共 23 条

[1] Nanotube-based gas sensors - Role of structural defects [J].

Andzelm, J ;

Govind, N ;

Maiti, A .

CHEMICAL PHYSICS LETTERS, 2006, 421 (1-3) :58-62

[2] Binding of NH3 to graphite and to a (9,0) carbon nanotube -: art. no. 115409 [J].

Bauschlicher, CW ;

Ricca, A .

PHYSICAL REVIEW B, 2004, 70 (11) :115409-1

[3] Charge transfer from ammonia physisorbed on nanotubes -: art. no. 218301 [J].

Bradley, K ;

Gabriel, JCP ;

Briman, M ;

Star, A ;

Grüner, G .

PHYSICAL REVIEW LETTERS, 2003, 91 (21) :1-218301

[4] Adsorption of NH3 and NO2 molecules on carbon nanotubes [J].

Chang, H ;

Lee, JD ;

Lee, SM ;

Lee, YH .

APPLIED PHYSICS LETTERS, 2001, 79 (23) :3863-3865

[5] Carbon-nanotube-based resonant-circuit sensor for ammonia [J].

Chopra, S ;

Pham, A ;

Gaillard, J ;

Parker, A ;

Rao, AM .

APPLIED PHYSICS LETTERS, 2002, 80 (24) :4632-4634

[6] Multi-walled carbon nanotubes experiencing electrical breakdown as gas sensors [J].

Chung, JY ;

Lee, KH ;

Lee, J ;

Troya, D ;

Schatz, GC .

NANOTECHNOLOGY, 2004, 15 (11) :1596-1602

[7]

COLLIN RE, 2001, FDN MICROWAVE ENG, P497

[8] Extreme oxygen sensitivity of electronic properties of carbon nanotubes [J].

Collins, PG ;

Bradley, K ;

Ishigami, M ;

Zettl, A .

SCIENCE, 2000, 287 (5459) :1801-1804

[9] Sensitivity of ammonia interaction with single-walled carbon nanotube bundles to the presence of defect sites and functionalities [J].

Feng, X ;

Irle, S ;

Witek, H ;

Morokuma, K ;

Vidic, R ;

Borguet, E .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (30) :10533-10538

[10] Oxygen adsorption on graphite and nanotubes [J].

Giannozzi, P ;

Car, R ;

Scoles, G .

JOURNAL OF CHEMICAL PHYSICS, 2003, 118 (03) :1003-1006

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