Abstract
This paper presents a stretchable glucose sensor composed of dodecylbenzenesulfonate-doped polypyrrole (PPyDBS)-coated vertically aligned carbon nanotube (VACNT) forests rooted in polydimethylsiloxane (PDMS) substrate. The measured sensitivity was approximately 10 mA cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> M <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> with a wide linear range demonstrated, as low as 0.1 mM and up to 12 mM, and the sensor achieved 90% of steady-state current in less than 3 seconds. The PDMS/CNT/PPy(DBS)/GOx structure was tested under stretching, demonstrating the coefficients of determination larger than 0.982, indicating its robustness of sensing capability of glucose concentrations with tensile strain up to 75%. These results show the potential of this stretchable glucose sensor with a novel fabrication strategy and stretchable electrode design toward potential wearable applications interfacing with physiological fluids.
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