Electrocatalytic properties of NDGA and NDGA/FAD hybrid film modified electrodes for NADH/NAD+ redox reaction

2006 ◽  
Vol 51 (22) ◽  
pp. 4744-4753 ◽  
Author(s):  
Shen-Ming Chen ◽  
Meei-Ing Liu
Keyword(s):  
Redox Reaction ◽  
Hybrid Film ◽  
Modified Electrodes ◽  
Electrocatalytic Properties

scholarly journals Synthesis of poly-Lysine/Gold nanoparticle films and their electrocatalytic properties

2011 ◽  
Vol 1 (4) ◽  
pp. 119-126 ◽  
Keyword(s):  
Gold Nanoparticles ◽  
Electron Transfer ◽  
Glassy Carbon ◽  
Electrochemical Impedance ◽  
Supporting Electrolyte ◽  
Phosphate Buffer Solution ◽  
Modified Electrodes ◽  
Buffer Solution ◽  
Transfer Constant ◽  
Electrocatalytic Properties

Films composed of citrate stabilized gold nanoparticles (AuNPs) and Poly-Lysine (pLys) were fabricated by electropolymerization on glassy carbon (GC) electrodes from 0.1M phosphate buffer solution at pH = 8. The films were topographically analyzed by atomic force microcopy whereas their electrocatalytic properties were studied by cyclic voltammetry and electrochemical impedance spectroscopy in aqueous solution using 0.0005M [Fe(CN)6] 3-/4- as redox probes and 0.1M NaClO4 as supporting electrolyte. The electron transfer process proved to be more efficient at the pLys-AuNP modified electrodes containing low amounts of gold nanoparticles (500 µL, 2.5×10-4M) than at the bare glassy carbon electrode. The heterogeneous electron transfer constant increased 2 orders of magnitude at the pLys-AuNP modified electrodes proving a more efficient electron transfer than at bare GC. These new films have a great potential for DNA biosensor applications.

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