{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T17:38:27Z","timestamp":1775065107956,"version":"3.50.1"},"reference-count":14,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2009,12,3]],"date-time":"2009-12-03T00:00:00Z","timestamp":1259798400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>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.<\/jats:p>","DOI":"10.3390\/s91209805","type":"journal-article","created":{"date-parts":[[2009,12,3]],"date-time":"2009-12-03T11:19:01Z","timestamp":1259839141000},"page":"9805-9815","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["SAW RFID-Tags for Mass-Sensitive Detection of Humidity and Vapors"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1596-0584","authenticated-orcid":false,"given":"Peter  A.","family":"Lieberzeit","sequence":"first","affiliation":[{"name":"Department of Analytical Chemistry and Food Chemistry, University of Vienna, Waehringer Strasse 38, A-1090 Vienna, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christian","family":"Palfinger","sequence":"additional","affiliation":[{"name":"Department of Analytical Chemistry and Food Chemistry, University of Vienna, Waehringer Strasse 38, A-1090 Vienna, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3053-8541","authenticated-orcid":false,"given":"Franz  L.","family":"Dickert","sequence":"additional","affiliation":[{"name":"Department of Analytical Chemistry and Food Chemistry, University of Vienna, Waehringer Strasse 38, A-1090 Vienna, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gerhard","family":"Fischerauer","sequence":"additional","affiliation":[{"name":"Chair of Measuring Technique and Control Engineering, Bayreuth University, Universit\u00e4tsstra\u00dfe 30, D-95440 Bayreuth, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2009,12,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Schiopu, P., Cristea, I., Grosu, N., and Craciun, A. (2009). Recent developments in surface acoustic wave sensors. Proc. SPIE 7297, art. No. 72972G.","DOI":"10.1117\/12.823700"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"4","DOI":"10.1109\/JSEN.2001.923583","article-title":"SAW Sensors for harsh environments","volume":"1","author":"Wolff","year":"2000","journal-title":"IEEE Sens. J."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"3449","DOI":"10.1021\/ac001524k","article-title":"A dual-adsorbent preconcentrator for a portable indoor-VOC microsensor system","volume":"73","author":"Lu","year":"2001","journal-title":"Anal Chem."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"168","DOI":"10.1016\/j.snb.2007.07.028","article-title":"Layered SAW sensor with single-walled carbon nanotube-based nanocomposite coating","volume":"127","author":"Penza","year":"2007","journal-title":"Sens. Actuat. B"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"120","DOI":"10.1016\/S0925-4005(98)00097-5","article-title":"SAW devices\u2014sensitivity enhancement in going from 80 MHz to 1 GHz","volume":"46","author":"Dickert","year":"1998","journal-title":"Sens. Actuat. B"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Caliendo, C. (2006). Acoustic method of investigating the material properties and humidity sensing behavior of polymer coated piezoelectric substrates. J. Appl. Phys., 100, art. No. 054081.","DOI":"10.1063\/1.2336303"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1165","DOI":"10.1016\/j.msec.2005.09.059","article-title":"Single-walled carbon nanotubes nanocomposite microacoustic organic vapor sensors","volume":"26","author":"Penza","year":"2006","journal-title":"Mat. Sci. Eng. C"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"745","DOI":"10.1016\/S0957-4158(99)00030-6","article-title":"Wireless identification and sensing using surface acoustic wave devices","volume":"9","author":"Springer","year":"1999","journal-title":"Mechatronics"},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Janata, J. (1989). Principles of Chemical Sensors, Plenum Press.","DOI":"10.1007\/978-1-4757-6257-0"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"231","DOI":"10.1016\/0924-4247(94)00808-6","article-title":"Mechanical sensors based on surface acoustic waves","volume":"44","author":"Seifert","year":"1994","journal-title":"Sens. Actuat. A"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1016\/S0928-4931(99)00100-9","article-title":"Supramolecular strategies in chemical sensing","volume":"10","author":"Dickert","year":"1999","journal-title":"Mat. Sci. Eng. C"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"300","DOI":"10.1016\/S0925-4005(00)00448-2","article-title":"Relative humidity sensing by PVA-coated dual resonator SAW oscillator","volume":"68","author":"Penza","year":"2000","journal-title":"Sens. Actuat. B"},{"key":"ref_13","first-page":"192","article-title":"Molecular imprinting in chemical sensing","volume":"18","author":"Dickert","year":"1999","journal-title":"TrAC"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"826","DOI":"10.1002\/adma.19930051108","article-title":"Mass sensitive detection of solvent vapors with calix[n]arenes. Conformational adaptation to the analyte","volume":"5","author":"Dickert","year":"1993","journal-title":"Adv Mater."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/9\/12\/9805\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T22:11:53Z","timestamp":1760220713000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/9\/12\/9805"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2009,12,3]]},"references-count":14,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2009,12]]}},"alternative-id":["s91209805"],"URL":"https:\/\/doi.org\/10.3390\/s91209805","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2009,12,3]]}}}