Sebők Dániel and Janovák László and Sápi András and Dobó Dorina Gabriella and Kukovecz Ákos and Kónya Zoltán and Dékány Imre: Room temperature ethanol sensor with SUB-PPM detection limit : improving the optical response by using mesoporous silica foam.
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Abstract
In this paper a low ppm-range ethanol sensor - operating at room temperature - is presented. The three types of ZnO2 based hybrid thin films as sensor surfaces consist of semiconductor nanoparticles, polyelectrolyte (polyacrylic acid, PAA) and/or mesoporous silica. The thin films were prepared by Layer-by-Layer (LbL) self-assembly method and were subjected to reflectometric interference measurements (RIfS) for testing sensorial application. The sensor investigation showed that the detection limit of the thin films is in the sub-ppm range. Applying mesoporous silica as surface coating or interlayers in the sandwich-structured thin film (ZnO/SF) improved the optical response, but the sensitivity showed non-linear characteristic. The thin film with mixed structure (ZnO/PAA/ZnO/SF) showed linear response in the 0.5-12 ppm range with 0.6 nm /ppm sensitivity and acceptable selectivity.
| Item Type: | Conference or Workshop Item |
|---|---|
| Journal or Publication Title: | Proceedings of the International Symposium on Analytical and Environmental Problems |
| Date: | 2016 |
| Volume: | 22 |
| ISBN: | 978-963-306-507-5 |
| Page Range: | pp. 407-411 |
| Language: | English |
| Event Title: | International Symposium on Analytical and Environmental Problems (22.) (2016) (Szeged) |
| Related URLs: | http://acta.bibl.u-szeged.hu/55893/ |
| Uncontrolled Keywords: | Fizikai kémia |
| Additional Information: | Bibliogr.: 411. p. ; összefoglalás angol nyelven |
| Date Deposited: | 2018. Dec. 13. 11:14 |
| Last Modified: | 2026. Feb. 24. 08:10 |
| URI: | http://acta.bibl.u-szeged.hu/id/eprint/56132 |
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