Authors: M. Frydrych, L. Lensu, C. Aschi, S. Parkkinen, J. Parkkinen and T. Jaaskelainen
Affilation: Lappeenranta University of Technology, Finland
Pages: 5 - 8
Keywords: absorption, bacteriorhodopsin, retinal, smart sensors
Bacteriorhodopsin (BR) is a light-transducing protein contained in a purple membrane of microorganism Halobacterium salinarium. Natural function of BR is to act as a light-driven proton pump in energy balancing mechanism of the bacterium. Numerous technical applications of BR that use proton pumping have been proposed . A thin ?lm of oriented BR enclosed between two electrodes generates a temporal photovoltage response when illuminated . The intensity of photoresponse depends on intensity and spectral power distribution of illuminating light. This work describes a model of wavelength dependency of photoresponse of elements containing a thin ?lm of wild form of BR and its reconstituents and compares the model to experimentally measured values.