Direct electron transfer of PQQ-glucose dehydrogenase at modified carbon nanotubes electrodes
| Autor: | V. Scherbahn, Ivo W. Schubart, Fred Lisdat, Gero Göbel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Inorganic chemistry
Carbon nanotube law.invention Coupling (electronics) lcsh:Chemistry chemistry.chemical_compound Electron transfer chemistry Pyrroloquinoline quinone lcsh:Industrial electrochemistry lcsh:QD1-999 Glucose dehydrogenase law Covalent bond Polyaniline Electrode Electrochemistry lcsh:TP250-261 |
| Zdroj: | Electrochemistry Communications, Vol 13, Iss 11, Pp 1240-1243 (2011) |
| ISSN: | 1388-2481 |
| Popis: | In order to establish efficient enzyme-electrode-contacts for the pyrroloquinoline quinone dependent glucose dehydrogenase (PQQ-GDH) different immobilisation strategies are investigated. Multi-walled carbon nanotubes (MWCNT) on gold electrodes are modified by chemical treatment and by (poly)-aniline derivatives. The electropolymerisation of methoxy-m-anilinesulfonic acid and m-aminobenzoic acid on the MWCNTs allows the covalent coupling of the PQQ-GDH. Such a poly-[ASA-ABA]/MWCNT/Au electrode can achieve current densities of up to 500 μA/cm2 at a potential of 100 mV vs. Ag/AgCl. Furthermore investigations with small amounts of free PQQ indicate direct electron transfer between enzyme and electrode. Keywords: Glucose dehydrogenase, Polyaniline, Carbon nanotubes, Direct electron transfer |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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