A3.4 - Biosensor based on a split-ring resonator
- AMA Conferences 2017
2017-05-30 - 2017-06-01
- Proceedings Sensor 2017
- A3 - Biosensors II
- T. Reinecke, T. Kobelt, A. Ahrens, S. Zimmermann, T. Scheper, J. Walter - Leibniz Universität Hannover (Germany)
- 78 - 83
Split-ring resonators are electrical circuits, which enable highly sensitive readout of split capacity changes via a measurement of shift of the resonance frequency. Thus, functionalization of the split allows the development of biosensors, where selective molecular binding causes a change in permittivity and therefore a change in split capacity. In this work, we present a systematic study of the relevant parameters of a split-ring resonator, verified by electromagnetic simulations and measurements with different sensor topologies. Subsequently, the split of a resonator is functionalized with aptamers and the sensor response is investigated. Here, introducing the target protein results in a shift of the resonance frequency caused by a permittivity change due to aptamer-mediated protein binding, which allows selective detection of the target protein.