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A Field-Effect-Transistor Sensor Based on Polypyrrole Nanotubes Coupled with Heparin for Thrombin Detection
Cited 11 time in
Web of Science
Cited 12 time in Scopus
- Authors
- Issue Date
- 2008
- Publisher
- Taylor & Francis
- Citation
- Mol. Cryst. Liq. Cryst., 491, 21–31
- Keywords
- biosensensors ; field-effect transistors ; heparin ; polypyrrole ; thrombin
- Abstract
- Carboxylated polypyrrole (CPPy) nanotubes were fabricated by the chemical
copolymerization of pyrrole and pyrrole-3-carboxylic acid (P3CA) using cylindrical
micelle templates. Importantly, the chemical functionality of CPPy nanotubes was
determined by the input amount of P3CA and their redox property was also
retained without degradation. A field-effect-transistor (FET) sensor platform
was constructed using liquid-ion gating. CPPy nanotubes were anchored on an
amine-functionalized Au interdigitated microelectrode substrate to achieve high
quality contact at the polymer=metal interface. Subsequently, heparin was covalently
conjugated with the CPPy nanotubes via a diamino linker. The FET sensor
based on heparin-conjugated CPPy nanotubes showed specific and fast response
upon exposure to thrombin protein.
- ISSN
- 1542-1406
- Language
- English
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