Sensors 2013, 13(2), 1754-1762; doi:10.3390/s130201754
Article

Enhancement of NH3 Gas Sensitivity at Room Temperature by Carbon Nanotube-Based Sensor Coated with Co Nanoparticles

1 School of Engineering Physics, Hanoi University of Science and Technology, 1 Dai Co Viet Rd, Hanoi 10000, Vietnam 2 Advanced Institute of Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet Rd, Hanoi 10000, Vietnam
* Author to whom correspondence should be addressed.
Received: 27 November 2012; in revised form: 25 January 2013 / Accepted: 29 January 2013 / Published: 30 January 2013
(This article belongs to the Section Chemical Sensors)
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Abstract: Multi-walled carbon nanotube (MWCNT) film has been fabricated onto Pt-patterned alumina substrates using the chemical vapor deposition method for NH3 gas sensing applications. The MWCNT-based sensor is sensitive to NH3 gas at room temperature. Nanoclusters of Co catalysts have been sputtered on the surface of the MWCNT film to enhance gas sensitivity with respect to unfunctionalized CNT films. The gas sensitivity of Co-functionalized MWCNT-based gas sensors is thus significantly improved. The sensor exhibits good repeatability and high selectivity towards NH3, compared with alcohol and LPG.
Keywords: multi-walled carbon nanotube; CVD; sensor; NH3; catalyst

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MDPI and ACS Style

Nguyen, L.Q.; Phan, P.Q.; Duong, H.N.; Nguyen, C.D.; Nguyen, L.H. Enhancement of NH3 Gas Sensitivity at Room Temperature by Carbon Nanotube-Based Sensor Coated with Co Nanoparticles. Sensors 2013, 13, 1754-1762.

AMA Style

Nguyen LQ, Phan PQ, Duong HN, Nguyen CD, Nguyen LH. Enhancement of NH3 Gas Sensitivity at Room Temperature by Carbon Nanotube-Based Sensor Coated with Co Nanoparticles. Sensors. 2013; 13(2):1754-1762.

Chicago/Turabian Style

Nguyen, Lich Q.; Phan, Pho Q.; Duong, Huyen N.; Nguyen, Chien D.; Nguyen, Lam H. 2013. "Enhancement of NH3 Gas Sensitivity at Room Temperature by Carbon Nanotube-Based Sensor Coated with Co Nanoparticles." Sensors 13, no. 2: 1754-1762.

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