Journal article

Publication year: 2011

Pages: 554-558

Journal: Engineering in Life Sciences

Volume number: 11

Issue number: 6

ISSN: 1618-0240

DOI Link: https://doi.org/10.1002/elsc.201100079

Publisher: Wiley

Abstract: 
The present work contributes to the development of reusable sensing systems with a visual evaluation of the detection process related to an analyte. An electrochemical switchable protein-based optical device was designed with the core part composed of cytochrome c immobilized in a mesoporous indium tin oxide film. A color-developing redox-sensitive dye was used as switchable component of the system. The cytochrome c-catalyzed oxidation of the dye by hydrogen peroxide is spectroscopically investigated. When the dye is co-immobilized with the protein, its redox state is easily controlled by application of an electrical potential at the supporting material. This enables to electrochemically reset the system to the initial state and repetitive signal generation. The implemented reset function of the color forming reaction will make calibration of small test devices possible. The principle can be extended to other color forming redox reactions and to coupled enzyme systems, such as rapid food testing and indication of critical concentrations of metabolites for health care.

Harvard Citation style: Frasca, S., Richter, C., von Graberg, T., Smarsly, B. and Wollenberger, U. (2011) Electrochemical switchable protein-based optical device, Engineering in Life Sciences, 11(6), pp. 554-558. https://doi.org/10.1002/elsc.201100079

APA Citation style: Frasca, S., Richter, C., von Graberg, T., Smarsly, B., & Wollenberger, U. (2011). Electrochemical switchable protein-based optical device. Engineering in Life Sciences. 11(6), 554-558. https://doi.org/10.1002/elsc.201100079