Monolayer anthracene and anthraquinone modified electrodes as platforms for Trametes hirsuta laccase immobilisation.
Surface modification techniques are essential to the construction of enzyme based elements of biofuel cells and biosensors. In this article we report on the preparation and characterisation of modified carbon electrodes which were used as supports for the immobilisation of laccase from Trametes hirsuta. The electrodes were electrochemically modified with diamine or diazonium linkers followed by attachment of either anthracene or anthraquinone head groups using solid phase chemical methodology. These well defined surfaces were found to effectively bind laccase and to provide direct electrical contact to the enzyme active site, as evidenced by XPS, EIS and voltammetry, respectively. The influence of the type of linker and head group on enzyme binding and bioelectrocatalytic activity are evaluated.
Sosna
Maciej
M
School of Chemistry, University of Southampton, Southampton, SO17 1BJ, UK.
Chrétien
Jean-Mathieu
JM
Kilburn
Jeremy D
JD
Bartlett
Philip N
PN
D000873:Anthracenes / Q000737:chemistry*; D000880:Anthraquinones / Q000737:chemistry*; D020134:Catalytic Domain; D058266:Dielectric Spectroscopy; D004563:Electrochemistry; D004566:Electrodes; D004800:Enzymes, Immobilized / Q000737:chemistry*; D042845:Laccase / Q000737:chemistry*; D008958:Models, Molecular; D013499:Surface Properties; D055454:Trametes / Q000201:enzymology*
D000873:Anthracenes; D000880:Anthraquinones; D004800:Enzymes, Immobilized; D042845:Laccase; C034020:anthracene