In memoriam Prof. Dr. C. J. van der Klaauw

Spectroelectrochemistry of cytochrome c and azurin immobilized in nanoporous antimony-doped tin oxide

“…Using a Butler-Volmer kinetic model to fit the data, a k 0 of 1.35 s À1 was determined. [21][22][23] Although faster rates have been reported with planar electrodes (18 s À1 on ITO), 24 this rate is comparable to that determined for cytC adsorbed to other mesoporous materials like SnO 2 or porous ITO. 10,14 Owing to the excellent transparency of the porous ATO films, the characteristic UV-vis spectrum of oxidized cytC including both the Soret band (409 nm) and the Q-band (circa 530 nm) could be easily detected through the coated slide in an ordinary transmission mode experiment without any signal amplification (Fig.…”