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Flexible UHF resistive humidity sensors based on carbon nanotubes
iPack VINN Excellence Center, School of Information and Communication Technology, KTH, Stockholm.
iPack VINN Excellence Center, School of Information and Communication Technology, KTH, Stockholm.
iPack VINN Excellence Center, School of Information and Communication Technology, KTH, Stockholm.
iPack VINN Excellence Center, School of Information and Communication Technology, KTH, Stockholm.
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2012 (English)In: IEEE Sensors Journal, ISSN 1530-437X, E-ISSN 1558-1748, Vol. 12, no 9, 2844-2850 p.Article in journal (Refereed) Published
Abstract [en]

This paper presents the investigation of the resistive humidity-sensing properties of multi-walled carbon nanotubes (MWCNTs). MWCNTs functionalized by acid treatment (f-MWCNTs) exhibit rather high sensitivity in resistance toward humidity, owing to the presence of carboxylic groups on the nanotube surface. By integrating the f-MWCNTs resistor into a wireless sensor platform, flexible humidity sensors for ultra-high frequency applications are investigated. The operating frequency range of the sensor is dramatically increased from 600 MHz to 2 GHz by adjusting the resistor-electrodes' configuration. This enhancement is predominately attributed to the variation in parasitic capacitance between the resistor-electrodes.

Place, publisher, year, edition, pages
2012. Vol. 12, no 9, 2844-2850 p.
National Category
Nano Technology Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Engineering Science with specialization in Electronics
Identifiers
URN: urn:nbn:se:uu:diva-180104DOI: 10.1109/JSEN.2012.2202390ISI: 000307445300001OAI: oai:DiVA.org:uu-180104DiVA: diva2:548148
Available from: 2012-08-29 Created: 2012-08-29 Last updated: 2017-12-07Bibliographically approved

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Zhang, Zhi-Bin

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