Nano Archive

Palladium nanoparticles decorated single-walled carbon nanotube hydrogen sensor

Mubeen, Syed and Zhang, Ting and Yoo, Bongyoung and Deshusses, Marc A. and Myung, Nosang V. (2007) Palladium nanoparticles decorated single-walled carbon nanotube hydrogen sensor. JOURNAL OF PHYSICAL CHEMISTRY C, 111 (17). pp. 6321-6327.

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We developed a simple and cost-effective fabrication technique to construct a hydrogen nanosensor by decorating single-walled carbon nanotubes with Pd nanoparticles. By varying the sensor's synthesis conditions (e.g., Pd electrodeposition charge, deposition potential, and initial baseline resistance of the SWNT network), the sensing performance was optimized. The optimized sensor showed excellent sensing properties toward hydrogen (ΔR/R of 0.42%/ppm) with a lower detection limit of 100 ppm and a linear response up to 1000 ppm. The response time decreased from tens of minutes to a few minutes with increasing hydrogen concentration at room temperature. The sensor's recovery time improved under humid air conditions compared to dry air conditions.

Item Type:Article
Subjects:Analytical Science > Nanotechnology for sensing and actuating
Physical Science > Nano objects
ID Code:3191
Deposited By:Anuj Seth
Deposited On:26 May 2009 15:16
Last Modified:26 May 2009 15:16

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