Potassium sensing with membrane-coated silicon nanowire field-effect transistors

Wipf, M.; Stoop, R.L.; Tarasov, A.; Bedner, K.; Fu, W.; Calame, M.; Schonenberger, C.

doi:10.1109/Transducers.2013.6626984

Potassium sensing with membrane-coated silicon nanowire field-effect transistors

Wipf M, Stoop RL, Tarasov A, Bedner K, Fu W, Calame M & Schonenberger C

Citation

Wipf, M., Stoop, R. L., Tarasov, A., Bedner, K., Fu, W., Calame, M., & Schonenberger, C. (2013). Potassium sensing with membrane-coated silicon nanowire field-effect transistors. 2013 Transducers and Eurosensors XXVII: the 17th international conference on solid-state sensors, actuators and microsystems, Transducers and Eurosensors 2013. (pp. 1182-1185). Presented at the 2013 17th international conference on solid-state sensors, actuators and microsystems, Transducers and Eurosensors 2013. https://doi.org/10.1109/Transducers.2013.6626984

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:65915

Ion sensitive field-effect transistors (ISFETs) based on silicon nanowires (Si NWs) with high-k gate oxide layers display surface hydroxyl groups which are known to be sensitive to variations in pH and electrolyte concentration. To specifically detect other species than protons, oxide surfaces need to be chemically modified. In this work, we use polyvinyl chloride (PVC) membranes with embedded ionophores to specifically detect potassium ions. We find a high response of 38mV/decade in KCl concentration. Control measurements with MgCl and pH demonstrate the selectivity of the ionophore.

Details

Publication Type

Proceedings Paper

Title

Potassium sensing with membrane-coated silicon nanowire field-effect transistors

Author(s)

Wipf, M.

Stoop, R.L.

Tarasov, A.

Bedner, K. (6212 X-ray Nano-Optics)

Fu, W.

Calame, M.