细菌视紫红质生物膜光电探测器

Bacteriorhodopsin Biomembrane Photodetector

细菌视紫红质是一种光能存储与能量转换的生物膜蛋白质分子，在光作用下，能产生极为迅速的电荷分离和蛋白质电响应信号，这种光电信号不同于一般无机光电材料的光电响应特征。用电泳法在ＩＴＯ导电玻璃上沉积出定向细菌视紫红质薄膜，与铜电极构成夹细菌视紫红质薄膜和导电凝胶结构的光电探测器。实验研究了这种光电探测器在５３２ｎｍ波长、３０ｐｓ超短光脉冲作用下的光电响应信号。分析了产生这种光电响应的机理。

Bacteriorhodopsin is a kind of biomembrane protein molecule which can store and convert photoenergy. On light illumination, it generates a rapid charge separation and protein electric response signals, which differs from that of the common inorganic photoelectric material. Through electrophoresis method, oriented bacteriorhodopsin films are deposited on ITO conductive glass, with which and a copper electrode, a photodetector with bacteriorhodopsin films and conductive gel sandwiched is constructed. The photodetector′s response to 532 nm wavelength, 30 ps ultrashort laser pulse is studied experimentally. The mechanism of the photodetector′s photoelectric response is theoretically analyzed.