Noise Filtering by Bioelectronic Device Consisting of Bacteriorhodopsin and Spiropyran

Abstract

A bioelectronic device consisting of bacteriorhodopsin (bR) and spiropyran (SP) was constructed for noise filtering in the information processing of optical image. The effect of concentration on the photochromism of spiropyran films by spin coating technique was investigated. The effect of number of layers on the photocurrent of bR LB films was analyzed. The enhancement efficiency of signal to noise ratio by the device using two spiropyran films was increased to about 40% with 40 min of irradiation time while that of the device with one spiropyran film was 25% with 40 min.