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SAW RFID-Tags for Mass-Sensitive Detection of Humidity and Vapors

Title data

Lieberzeit, Peter A. ; Palfinger, Christian ; Dickert, Franz L. ; Fischerauer, Gerhard:
SAW RFID-Tags for Mass-Sensitive Detection of Humidity and Vapors.
In: Sensors. Vol. 9 (December 2009) Issue 12 . - pp. 9805-9815.
ISSN 1424-8220
DOI: https://doi.org/10.3390/s91209805

Project information

Project financing: Bayerisches Staatsministerium für Wissenschaft, Forschung und Kunst

Abstract in another language

One-port surface acoustic wave (SAW) devices with defined reflector patterns give characteristic signal patterns in the time domain making them identifiable and leading to so-called RFID-Tags. Each sensor responds with a burst of signals, their timed positions giving the identification code, while the amplitudes can be related to the analyte concentration. This paper presents the first combination of such a transducer with chemically sensitive layer materials. These include crosslinked polyvinyl alcohol for determining relative humidity and tert-butylcalix[4]arene for detecting solvent vapors coated on the free space between the reflectors. In going from the time domain to the frequency domain by Fourier transformation, changes in frequency and phase lead to sensor responses. Hence, it is possible to measure the concentration of tetrachloroethene in air down to 50 ppm, as well as 1% changes in relative humidity.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: SAW; RFID-tag; calix[n]arene; humidity; VOC sensing
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology > Chair Measurement and Control Technology - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology
Profile Fields
Profile Fields > Emerging Fields
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 19 Feb 2016 06:43
Last Modified: 19 Feb 2016 06:43
URI: https://eref.uni-bayreuth.de/id/eprint/30865