| Title | Layered SAW gas sensor with single-walled carbon nanotube-based nanocomposite coating |
|---|---|
| Publication Type | Articolo su Rivista peer-reviewed |
| Year of Publication | 2007 |
| Authors | Penza, Michele, Aversa Patrizia, Cassano Gennaro, Wlodarski W., and Kalantar-Zadeh K. |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 127 |
| Pagination | 168-178 |
| ISSN | 09254005 |
| Keywords | Acoustic surface wave devices, Chemical sensors, Langmuir Blodgett films, Langmuir Blodgett technique, Mathematical models, Nanocomposite coating, Nanocomposites, Single-walled carbon nanotubes (SWCN), Surface acoustic wave (SAW) sensors |
| Abstract | A Surface acoustic wave (SAW) sensor using a ZnO guiding layer on 36° Y-cut X-propagation LiTaO3 piezoelectric substrate has been designed and fabricated. Single-walled carbon nanotube (SWCNT)-based nanocomposite coatings have been deposited using the Langmuir-Blodgett technique. The sensor was tested towards H2, NH3, NO2 gases, in the range of 0.030-1%, 30-1000 ppm, 1-10 ppm, respectively. The output signal was the phase of the SAW device, which was monitored using a network analyzer. The developed sensor has a high sensitivity, good repeatability and low detection limit at sub-ppm levels, at room temperature. The experimental results obtained are compared to a theoretical model and the SAW gas sensing mechanisms are discussed with the acoustoelectric effect that appears to be dominant in the SAW response. © 2007 Elsevier B.V. All rights reserved. |
| Notes | cited By 93 |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-34848859949&doi=10.1016%2fj.snb.2007.07.028&partnerID=40&md5=7a5f13438aa09cec5a8fb2539ea34ea2 |
| DOI | 10.1016/j.snb.2007.07.028 |
| Citation Key | Penza2007168 |
