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

Sensors

Lich Quang Nguyen¹  Pho Quoc Phan¹  Huyen Ngoc Duong¹  Chien Duc Nguyen¹ 

[1] School of Engineering Physics, Hanoi University of Science and Technology, 1 Dai Co Viet Rd, Hanoi 10000, Vietnam; E-Mails:

关键词: multi-walled carbon nanotube;    CVD;    sensor;    NH₃;    catalyst;   

DOI  :  10.3390/s130201754

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.