Single interdigital transducer as surface acoustic wave impedance sensor
- Surface acoustic wave (SAW) devices are well-known for gravimetric sensor applications. In biosensing applications, chemical-and biochemically evoked adsorption processes at surfaces are detected in liquid environments using delay-line or resonator sensor configurations, preferably in combination with appropriate microfluidic devices. In this paper, a novel SAW-based impedance sensor type is introduced which uses only one interdigital electrode transducer (IDT) simultaneously as SAW generator and sensor element. It is shown that the amplitude of the reflected S-11 signal directly depends on the input impedance of the SAW device. The input impedance is strongly influenced by mass adsorption which causes a characteristic and measurable impedance mismatch.
| Author details: | Vu Hoa NguyenGND, S. Richert, Hyunji Park, Alexander BökerORCiDGND, Uwe Schnakenberg |
|---|---|
| DOI: | https://doi.org/10.1016/j.protcy.2017.04.032 |
| ISSN: | 2212-0173 |
| Title of parent work (English): | Biosensors |
| Publisher: | Elsevier |
| Place of publishing: | Amsterdam |
| Publication type: | Other |
| Language: | English |
| Date of first publication: | 2017/07/13 |
| Publication year: | 2017 |
| Release date: | 2022/09/16 |
| Tag: | PHEMA; SAW impedance sensor; microfluidic |
| Volume: | 27 |
| Number of pages: | 2 |
| First page: | 70 |
| Last Page: | 71 |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
| Peer review: | Referiert |
| License (German): |  CC-BY-NC-ND - Namensnennung, nicht kommerziell, keine Bearbeitungen 4.0 International |
