Abstract
The loading of multi-walled carbon nanotubes (MWNTs) and glucose oxidase (GOx) in the alternate layers of a glucose biosensor was first optimized based on a layer-by-layer construction on the surface of a graphite disk electrode. With the increasing of MWNTs/GOx layers, the response current to glucose was changed regularly and the response current reached a maximum value when the number of MWNTs/GOx layers was 6. Owing to a good electrical conductivity, strong adsorption and excellent bioconsistency of MWNTs, the (MWNTs/GOx) 6 films-coated glucose biosensor had an excellent electrochemical properties. The response current of the (MWNTs/GOx)6 films-coated biosensor to 3 × 10- 2 M glucose was 1.63 μA while the response time was only 6.7 s. The linear range and the lowest detectable concentration of this biosensor was 5 × 10- 4∼1.5 × 10- 2 M and 0.9 × 10- 4 M, respectively.
Original language | English |
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Pages (from-to) | 113-117 |
Number of pages | 5 |
Journal | Materials Science and Engineering C |
Volume | 26 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2006 Jan |
Keywords
- Glucose biosensor
- Glucose oxidase
- Layer-by-layer technique
- Multi-walled carbon nanotubes
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering