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

  • 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-μm 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.

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Metadaten
Author: Christoph Drexler, Tatiana V. Shishkanova, Christoph Lange, Sergey N. Danilov, Dieter Weiss, Sergey D. Ganichev, Vladimir M. MirskyORCiDGND
DOI:https://doi.org/10.5283/epub.31493
ISSN:1436-5073
Title of the source (English):Microchimica Acta
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2014
Volume/Year:181
First Page:1857
Last Page:1862
Faculty/Chair:Fakultät 2 Umwelt und Naturwissenschaften / FG Nanobiotechnologie
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