Electrochemical Characterization of Myoglobin-Polylysine Films at a Temperature Range of 6-80 degree C

This work demonstrated for the first time that myoglobin cross-linked in polylysine films is electrochemically active at 6 degree C. At 6 degree C, these protein films exhibited reversible reduction/oxidation peaks which are characteristic of FeIII/FeII redox couple. The estimated current function densities (J=1.6X10-4 C/V cm2), surface concentrations (T=0.10 nmol/cm2) and standard electron transfer constant (ks=13.86 s-1) at 6 degree C for the data taken at a scan rate of 0.1 V/s were similar to those which were obtained at 10, 15 and 23 degree C. Basically, this study shows a possible electrocatalytic application of these myoglobin/polylysine films, for example in low temperature sensing applications.