Enhanced hydrogen gas response of Pd nanoparticles-decorated single walled carbon nanotube film/SiO2/Si heterostructure
Yonggang Du, Qingzhong Xue, Zhongyang Zhang and 3 more
AIP Advances · 2015
doi:10.1063/1.4913953 (opens in a new tab)
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Abstract
A new type carbon nanotube-based gas sensor: palladium nanoparticles decorated single walled carbon nanotube film/SiO2/Si (Pd-SWCNT film/SiO2/Si) heterostructures were fabricated by a simple and practical filtration method. When used for hydrogen (H2) sensing, the Pd-SWCNT film/SiO2/p-Si heterostructure shows very high H2 response, which is tens of times higher than that of Pd-SWCNT film resistance-type H2 sensor in this paper and is superior to those of carbon nanotube-based resistance-type H2 sensors reported previously. The mechanism of the enhanced H2 response can be explained by thermionic emission theory and interfacial effect.
Abstract licence: CC BY
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