Field of Expertise: Advanced Material Science
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Field of Expertise: Advanced Material Science | |
Ion-selective electrolyte-gated field-effect transistors: prerequisites for proper functioning For the emerging fields of biomedical diagnostics and environmental monitoring, where sensor platforms for in-situ sensing of ions and biological substances in appropriate aqueous media are required, electrolyte-gated organic field-effect transistors (EGOFETs) seem to be the transducers of choice. Due to the formation of an electric double layer at the electrolyte/organic semiconductor interface, they exhibit a very high capacitance allowing for low-voltage and water-stable operation. In combination with the outstanding properties of organic devices like biocompatibility, low-temperature processability on flexible substrates, as well as the possibility to tune the physical and chemical properties enhancing the selectivity and sensitivity, EGOFET-based sensors are a highly promising novel sensor technology. In this context the realization of the first ion-selective EGOFETs as well as the realization as a broad range EGOFET based pH-sensor is discussed. |