Highly-sensitive, fast hydrogen sensing employing Pt-coated TiO2 nanotube arrays

Highly ordered TiO2 nanotube arrays were fabricated by anodization in an ethylene glycol solution containing NH4F. A pair of platinum electrodes was deposited on the surface of the nanotube layer to fabricate a Pt/TiO2 nanotube arrays hydrogen sensor. The subject sensors exhibited a seven order of m...

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Bibliographic Details
Published inFunctional materials letters Vol. 7; no. 3
Main Authors Chen, Kansong, Xie, Kun, Feng, Xinran, Tian, Han, Hu, Rui, Li, Yang, Gu, Haoshuang
Format Journal Article
LanguageEnglish
Published Singapore World Scientific Publishing Company 01.06.2014
World Scientific Publishing Co. Pte., Ltd
Subjects
Chemical sensors
Ethylene glycol
Hydrogen
Nanotubes
Platinum
Response time
Sensor arrays
Sensors
Titanium dioxide
selectivity
TiO2 nanotube arrays
room temperature
hydrogen sensor
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Summary:Highly ordered TiO2 nanotube arrays were fabricated by anodization in an ethylene glycol solution containing NH4F. A pair of platinum electrodes was deposited on the surface of the nanotube layer to fabricate a Pt/TiO2 nanotube arrays hydrogen sensor. The subject sensors exhibited a seven order of magnitude change in resistance with a response time of 13 s at room temperature upon exposure to 2000 ppm (parts per million) hydrogen. We investigated the hydrogen response of the Pt/TiO2 sensors as a function of the length of the nanotubes and compared their activity with that of a reference film.
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ISSN:1793-6047
1793-7213
DOI:10.1142/S1793604714500210