Electrochemical synthesis of Au/polyaniline–poly(4-styrenesulfonate) hybrid nanoarray for sensitive biosensor design

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摘要：

Au/polyaniline (PANI)–poly(4-styrenesulfonate) (PSS) hybrid nanoarray is fabricated for biomolecular sensing in neutral aqueous solutions. Firstly, an array of one-dimensional Au nanorods (diameter=ca. 200nm, length=ca. 3μm) is formed by a template-electrodeposition method using a porous anodic alumina membrane, and then a thin PANI–PSS composite layer is electropolymerized on the surface of the Au nanorods. The resulting Au/PANI–PSS hybrid nanoarray exhibits a quasi-reversible redox electrochemical process at ca. +0.11V and electrocatalytic oxidation of reduced β-nicotinamide adenine dinucleotide (NADH) is attained with a detection limit of 0.3μM in a neutral solution.

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Practical, Experimental/ alumina biochemistry biosensors catalysts conducting polymers electrodeposition gold molecular biophysics nanocomposites nanotechnology oxidation polymer films polymerisation reduction (chemical)/ electrochemical synthesis gold-polyaniline-poly(4-styrenesulfonate) hybrid nanoarray biosensor design neutral aqueous solutions nanorods template-electrodeposition method porous anodic alumina membrane thin PANI-PSS composite layer surface electropolymerization quasireversible redox electrochemical process electrocatalytic oxidation beta-nicotinamide adenine dinucleotide Au/ A8780B Biosensors A8116 Methods of nanofabrication and processing A8715D Physical chemistry of biomolecular solutions condensed states A8783 Nanotechnology applications in biomedicine A8115L Deposition from liquid phases (melts and solutions) A8245 Electrochemistry and electrophoresis A8265F Film and membrane processes ion exchange dialysis osmosis, electro-osmosis A8235 Polymer reactions and