Abstract
AbstractOptical waveguide spectroscopy was used under non‐contact conditions to analyze the visible absorption spectrum of poly(ethylene oxide) (M w = 150) modified cytochrome c (PEO150‐cyt.c) adsorbed on an indium tin oxide (ITO) glass electrode. The redox reactions of the adsorbed PEO150‐cyt.c were dynamically measured in situ in PEO oligomers (M w = 200). It was confirmed that PEO modification of cyt.c is effective in maintaining the redox activity of the cyt.c after adsorption on the ITO glass electrode. The PEO150‐cyt.c adsorbed on the electrode re‐dissolved gradually in PEO oligomer. Against this, PEO1000‐cyt.c having longer PEO chains (M w = 1000) was found to be adsorbed stably on the electrode. Copyright © 2003 John Wiley & Sons, Ltd.
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