Carbon nanotube films for room temperature hydrogen sensing

被引:126
作者
Sippel-Oakley, J
Wang, HT
Kang, BS
Wu, ZC
Ren, F
Rinzler, AG [1 ]
Pearton, SJ
机构
[1] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[2] Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA
[3] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA
关键词
D O I
10.1088/0957-4484/16/10/040
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Thin, uniform, single-walled carbon nanotube films, made by a simple filtration process, subsequently coated with palladium, are shown to be promising detectors of hydrogen. The films detected hydrogen with relative responses of 20% at 100 ppm and 40% at 500 ppm concentrations. Most of the initial film conductance was recovered within 30 s by exposing the samples to air. This quick and easy recoverability make the Pd-coated nanotubes suitable for practical applications in room temperature hydrogen sensing while consuming only similar to 0.25 mW power. The film fabrication process provides highly reproducible control over the film thickness; an important ingredient for commercial production. In the course of this research strong evidence was obtained indicating that sputter deposition of metal onto the nanotubes, even under very low power, short exposure time conditions, does damage to the nanotubes.
引用
收藏
页码:2218 / 2221
页数:4
相关论文
共 10 条
[1]   Short-channel effects in contact-passivated nanotube chemical sensors [J].
Bradley, K ;
Gabriel, JCP ;
Star, A ;
Grüner, G .
APPLIED PHYSICS LETTERS, 2003, 83 (18) :3821-3823
[2]   Extreme oxygen sensitivity of electronic properties of carbon nanotubes [J].
Collins, PG ;
Bradley, K ;
Ishigami, M ;
Zettl, A .
SCIENCE, 2000, 287 (5459) :1801-1804
[3]   Nanotube molecular wires as chemical sensors [J].
Kong, J ;
Franklin, NR ;
Zhou, CW ;
Chapline, MG ;
Peng, S ;
Cho, KJ ;
Dai, HJ .
SCIENCE, 2000, 287 (5453) :622-625
[4]  
Kong J, 2001, ADV MATER, V13, P1384, DOI 10.1002/1521-4095(200109)13:18<1384::AID-ADMA1384>3.0.CO
[5]  
2-8
[6]   Full and modulated chemical gating of individual carbon nanotubes by organic amine compounds [J].
Kong, J ;
Dai, HJ .
JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (15) :2890-2893
[7]   Single wall carbon nanotubes for p-type ohmic contacts to GaN light-emitting diodes [J].
Lee, K ;
Wu, Z ;
Chen, Z ;
Ren, F ;
Pearton, SJ ;
Rinzler, AG .
NANO LETTERS, 2004, 4 (05) :911-914
[8]   Hydrogen sensors based on carbon nanotubes thin films [J].
Sayago, I ;
Terrado, E ;
Lafuente, E ;
Horrillo, MC ;
Maser, WK ;
Benito, AM ;
Navarro, R ;
Urriolabeitia, EP ;
Martinez, MT ;
Gutierrez, J .
SYNTHETIC METALS, 2005, 148 (01) :15-19
[9]   Giant thermopower effects from molecular physisorption on carbon nanotubes [J].
Sumanasekera, GU ;
Pradhan, BK ;
Romero, HE ;
Adu, KW ;
Eklund, PC .
PHYSICAL REVIEW LETTERS, 2002, 89 (16)
[10]   Transparent, conductive carbon nanotube films [J].
Wu, ZC ;
Chen, ZH ;
Du, X ;
Logan, JM ;
Sippel, J ;
Nikolou, M ;
Kamaras, K ;
Reynolds, JR ;
Tanner, DB ;
Hebard, AF ;
Rinzler, AG .
SCIENCE, 2004, 305 (5688) :1273-1276