DocumentCode :
3458188
Title :
Potassium sensing with membrane-coated silicon nanowire field-effect transistors
Author :
Wipf, M. ; Stoop, R.L. ; Tarasov, A. ; Bedner, K. ; Fu, Wei ; Calame, M. ; Schonenberger, C.
Author_Institution :
Dept. of Phys., Univ. of Basel, Basel, Switzerland
fYear :
2013
fDate :
16-20 June 2013
Firstpage :
1182
Lastpage :
1185
Abstract :
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.
Keywords :
chemical sensors; ion sensitive field effect transistors; nanosensors; nanowires; pH measurement; polymers; potassium; potassium compounds; silicon; ISFET; K; KCl; PVC; Si; chemically modified oxide surface; electrolyte concentration; embedded ionophore; high-k gate oxide layer; ion sensitive field effect transistor; membrane coated silicon nanowire field effect transistors; pH concentration; polyvinyl chloride membrane; potassium sensing; surface hydroxyl group; Adsorption; Ions; Liquids; Nanobioscience; Sensors; Silicon; Transistors; ISFET; Silicon nanowire; chemical sensing; ionophores;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013 Transducers & Eurosensors XXVII: The 17th International Conference on
Conference_Location :
Barcelona
Type :
conf
DOI :
10.1109/Transducers.2013.6626984
Filename :
6626984
Link To Document :
بازگشت