High-performance gas sensors with temperature measurement

Yong Zhang, Shengtao Li, Jingyuan Zhang, Zhigang Pan, Daomin Min, Xin Li, Xiaoping Song, Junhua Liu

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18 Citations (Scopus)

Abstract

There are a number of gas ionization sensors using carbon nanotubes as cathode or anode. Unfortunately, their applications are greatly limited by their multi-valued sensitivity, one output value corresponding to several measured concentration values. Here we describe a triple-electrode structure featuring two electric fields with opposite directions, which enable us to overcome the multi-valued sensitivity problem at 1 atm in a wide range of gas concentrations. We used a carbon nanotube array as the first electrode, and the two electric fields between the upper and the lower interelectrode gaps were designed to extract positive ions generated in the upper gap, hence significantly reduced positive ion bombardment on the nanotube electrode, which allowed us to maintain a high electric field near the nanotube tips, leading to a single-valued sensitivity and a long nanotube life. We have demonstrated detection of various gases and simultaneously monitoring temperature, and a potential for applications.

Original languageEnglish
Article number1267
JournalScientific Reports
Volume3
DOIs
Publication statusPublished - 2013
Externally publishedYes

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ASJC Scopus subject areas

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Cite this

Zhang, Y., Li, S., Zhang, J., Pan, Z., Min, D., Li, X., Song, X., & Liu, J. (2013). High-performance gas sensors with temperature measurement. Scientific Reports, 3, [1267]. https://doi.org/10.1038/srep01267