scholarly journals Cathodic photocurrent generation from zinc-substituted cytochrome b562 assemblies immobilized on an apocytochrome b562-modified gold electrode

2013 ◽  
Vol 42 (45) ◽  
pp. 16102 ◽  
Author(s):  
Akira Onoda ◽  
Yasuaki Kakikura ◽  
Takashi Hayashi
Keyword(s):  
Gold Electrode ◽  
Photocurrent Generation ◽  
Cytochrome B562

Photocurrent generation at a fullerene self-assembled monolayer-modified gold electrode cast with a polyurethane membrane

2000 ◽  
Vol 10 (10) ◽  
pp. 2231-2233 ◽  
Author(s):  
Olivier Enger ◽  
Frank Nuesch ◽  
Monia Fibbioli ◽  
Luis Echegoyen ◽  
Ernö Pretsch ◽  
...  
Keyword(s):  
Gold Electrode ◽  
Self Assembled Monolayer ◽  
Photocurrent Generation ◽  
Self Assembled ◽  
Polyurethane Membrane

Photocurrent Generation from Hierarchical Zinc-Substituted Hemoprotein Assemblies Immobilized on a Gold Electrode

2011 ◽  
Vol 124 (11) ◽  
pp. 2682-2685 ◽  
Author(s):  
Akira Onoda ◽  
Yasuaki Kakikura ◽  
Taro Uematsu ◽  
Susumu Kuwabata ◽  
Takashi Hayashi
Keyword(s):  
Gold Electrode ◽  
Photocurrent Generation

Photocurrent Generation from Hierarchical Zinc-Substituted Hemoprotein Assemblies Immobilized on a Gold Electrode

2011 ◽  
Vol 51 (11) ◽  
pp. 2628-2631 ◽  
Author(s):  
Akira Onoda ◽  
Yasuaki Kakikura ◽  
Taro Uematsu ◽  
Susumu Kuwabata ◽  
Takashi Hayashi
Keyword(s):  
Gold Electrode ◽  
Photocurrent Generation

scholarly journals Photocurrent generation properties of Histag-photosystem II immobilized on nanostructured gold electrode

2008 ◽  
Vol 516 (9) ◽  
pp. 2553-2557 ◽  
Author(s):  
Nao Terasaki ◽  
Masako Iwai ◽  
Noritaka Yamamoto ◽  
Takashi Hiraga ◽  
Sunao Yamada ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Gold Electrode ◽  
Photocurrent Generation ◽  
Nanostructured Gold

Comparison of Gold and Platinum Electrode Responses in Activated Sludge

1993 ◽  
Vol 28 (11-12) ◽  
pp. 473-480
Author(s):  
A. Heduit ◽  
B. Martin ◽  
I. Duchamp ◽  
D. R. Thevenot
Keyword(s):  
Electron Transfer ◽  
Activated Sludge ◽  
Gold Electrode ◽  
Platinum Electrode ◽  
Electrochemical Determination ◽  
Exchange Current ◽  
Experimental Conditions ◽  
Equilibrium Exchange ◽  
Prolonged Contact ◽  
Current Densities

Gold and platinum were compared to ascertain how they expressed a stabilized potential in activated sludge. The comparison was based on electrochemical determination of the electron transfer rate (i.e. equilibrium exchange current density) and recording of potentials against time. When both metals are treated in the same way, platinum gives equilibrium exchange current densities approx. 10 times higher than gold, both in aerated activated sludge and in treated water. For platinum, the equilibrium exchange current densities range from 0.1 to 0.25 µA/cm2 immediately after polishing and decrease during prolonged contact with activated sludge subjected to alternating aeration/anoxia sequences. The lower kinetics of electron transfer on gold go together with significant differences in response:- In an aerobic medium a gold electrode potential is lower than that of a platinum electrode. In a strongly anaerobic medium, the reverse is true. Consequently, the amplitude of the potential variation between aerobic and anaerobic media is smaller for gold than for platinum. Under our experimental conditions this amplitude was approx 350 mV for gold and 850 mV for platinum.- The slopes of the linear relationships between potential and pH or potential and the logarithm of the dissolved oxygen concentration are two or three times greater for platinum than for gold. Although the values obtained with platinum electrodes cannot represent a veritable equilibrium state, the platinum electrode zero-current potential would seem to be far more sensitive to variations in the medium than that of the gold electrode; it is, therefore, more suitable for use in activated sludge.

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