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(a) Schematic of the microfabricated structure of sMWNT electrode; (b) SEM micrograph of MWNT tip with CNT length of (scale bar equals to ); (c) setup for measurement of impedance spectra of parallel sMWNT electrodes; (d) (filled circle) and (filled square) at 1 kHz; (e) and (f) angle (Z) for two sMWNT electrodes in parallel (filled square) and single sMWNT electrode (filled circle) (Inset-circuit model for showing equivalent double layer capacitance , faradaic charge transfer resistance and constant phase element (CPE).
Comparison of for sensors utilizing individual and parallel sMWNT electrode configurations (Insets-Left: Placement (crosses) of sMWNT electrodes on sartorius muscle; Middle: Schematic of extracellular stimulation experiments using a sensor with a bipolar configuration with individual sMWNT electrodes; Right: with parallel sMWNT electrodes).
(a) Representative field potential recorded using individual sMWNT electrodes (Insets-Left: Placement of sMWNT electrode (crosses) and pin electrode (filled circle) on sartorius muscle; Right: Schematic of extracellular recording experiment); (b) Representative field potential recorded using parallel pairs of sMWNT electrodes (Inset-Schematic of extracellular recording experiment).
Sartorius muscle impedance spectra of (a) magnitude (Inset-Placement (crosses) of sMWNT electrodes on sartorious muscle) and (b) phase angle (Inset-Schematic of bioimpedance measurement setup) before (filled diamond) and after (filled square) desiccation at ; Representative (filled square) and (filled circle) at 1 kHz recorded (c) before and (d) after dessication at .
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