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A polypyrrole-carbon-nanotube (PPy-MWNT) nanocomposite glucose sensor

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2 Author(s)
Kwok-Siong Teh ; Dept. of Mech. Eng., California Univ., Berkeley, CA, USA ; Liwei Lin

We present a novel, two-terminal enzymatic molecular device sensitive to glucose concentration based on doped polypyrrole/multi-walled-carbon-nanotube (PPy-MWNT) nanocomposite that obviates the need for reference electrode and electron mediators. This is realized via reversible, oxidation-reduction induced conductivity change of a dodecylbenzenesulfonate (DBS)-doped PPy-MWNT membrane spanning across a microgap adjoining two electrodes. In this work, we discovered that although glucose oxidase (GOx)-laden, DBS-doped PPy membrane is sensitive to glucose between 0-10 mM, the incorporation of MWNT into similar membrane extends its detection ceiling to 20 mM, which covers the physiologically important range for diabetics.

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Micro Electro Mechanical Systems, 2004. 17th IEEE International Conference on. (MEMS)

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