Drexler, Christoph and Shishkanova, Tatiana V. and Lange, Christoph and Danilov, Sergey N. and Weiss, Dieter and Ganichev, Sergey D. and Mirsky, Vladimir M. (2014) Terahertz split-ring metamaterials as transducers for chemical sensors based on conducting polymers: a feasibility study with sensing of acidic and basic gases using polyaniline chemosensitive layer. MICROCHIMICA ACTA, 181 (15-16). pp. 1857-1862. ISSN 0026-3672, 1436-5073
Full text not available from this repository. (Request a copy)Abstract
We report on the first application of terahertz metamaterials acting as transducers for chemical sensors based on conducting polymers. In our feasibility study aimed at sensing of gaseous hydrochloric and ammonia, a two-dimensional sensor metamaterial consisting of an array of split-ring resonators on the surface of undoped silicon wafer was prepared. The surface of the resonator was coated with a 150-mu m layer of polyaniline. Binding of hydrogen chloride to polyaniline leads to distinct changes in the resonance frequency of the metamaterial. Measurements can be performed both in the reflection and transmission mode. A numerical simulation of the response revealed an increase of both the real and the imaginary components of the dielectric function of the polyaniline film. These changes are attributed to the transition from emaraldine base to emeraldine salt. The results demonstrate a new approach for formation of highly sensitive transducers for chemical sensors.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FILMS; SPECTROSCOPY; Metamaterial; Split-ring resonator; Chemical sensor; Transducer; Conducting polymer; Dielectric permittivity |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Aug 2019 11:07 |
| Last Modified: | 08 Aug 2019 11:07 |
| URI: | https://pred.uni-regensburg.de/id/eprint/9307 |
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