Abstract
Porous sol-gel (PSG) film has been utilized as a template for the electrochemical polymerization of aniline in presence of poly(acrylic acid) (PAA). The presence of electroactive polyaniline (PAn)/PAA within the porous skeleton of the sol-gel films has been confirmed using cyclic voltammetry, UV-vis spectrometry and atomic force microscopic measurements. The densities and the sizes of the nanoelectrodes can be controlled easily using electrochemical methods. The conductive polymer "wires" of PAn/PAA formation in PSG matrix can behave as an ensemble of closely-spaced but isolated nanoelectrodes. Moreover, the nanoelectrode ensembles based on conductive PAn/PAA for glucose biosensing are fabricated by immobilization of glucose oxidase (GOx) and Nafion onto the surface of conductive polymer. Owing to the biocompatibility of PSG and electro-activity of PAn/PAA at neutral pH regions, the glucose biosensor shows excellent characteristics and performance, such as low detection limit and fast response time.
| Original language | English |
|---|---|
| Pages (from-to) | 773-780 |
| Number of pages | 8 |
| Journal | Electrochemistry Communications |
| Volume | 9 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2007 |
Keywords
- Glucose biosensor
- Nanoelectrode ensembles
- Polyaniline/poly(acrylic acid)
- Porous sol-gel film
- Template synthesis
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