Electrochemical Biosensors

November 11, 2014 15:52 PSP Book - 9in x 6in 11-Serge-Cosnier-c11

QD Electrodes and Enzymatic Signal Chains Based on Direct Protein Electron Transfer 329

protein. This shows the defined basis of the electron transfer steps

observed [8].

Cytochrome c is the first redox protein for which DET to an

activated semiconducting NP has been observed. It provides the

basis for the construction of analytical signal chains that allow the

quantification of analyte molecules in solution.

As a first example the simple but well-defined reaction of

superoxide radicals with the redox protein has been used [9]. A

superoxide results from one electron transfer to molecular oxygen ...