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Circuit Modeling on Polyaniline Functionalized Nanowire-Templated Micro-Interdigital Capacitors for pH Sensing

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4 Author(s)
Antohe, Vlad Andrei ; Inst. of Condensed Matter & Nanosci. (ICMN), Univ. Catholique de Louvain, Louvain-la-Neuve, Belgium ; Radu, Adrian ; Matafi-Tempfli, S. ; Piraux, L.

This study presents an improved alternative current (ac) circuit modeling of a highly sensitive capacitive pH-sensing element based on polyaniline (PANI) functionalized nanowire-templated micro-interdigited electrodes (NWs μIDEs). While electrical resonance measurements deal with a total equivalent capacity, comparative investigations show a good agreement with the fitting parameters of the corresponding model. A physical interpretation of the model is discussed to help in understanding the detection mechanism and a possible methodology to be used for further integration of the subsequent device is suggested.

Published in:

Nanotechnology, IEEE Transactions on  (Volume:10 ,  Issue: 6 )