Flexible UHF Resistive Humidity Sensors Based on Carbon Nanotubes
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
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.
Carbon nanotube, flexible devices, humidity sensor, wireless sensor
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-100356DOI: 10.1109/JSEN.2012.2202390ISI: 000307445300001ScopusID: 2-s2.0-84864910575OAI: oai:DiVA.org:kth-100356DiVA: diva2:543387
Projectsthe Vinn Excellence Centerthe EU project CLIP
FunderSwedish Research Council, 2009-8068VINNOVA
QC 201506232012-08-072012-08-072015-06-23Bibliographically approved