Flexible sensor with conducting polymers and photosensitive protein

我们基于盐生细菌细胞膜中发现的细菌视紫红质(BR)色素设计了光传感器，并表明只使用一个传感元件就可以检测运动。光电池由BR浸涂薄膜和夹在带有ITO电极的玻璃板之间的电解液组成。我们通过在电极上图案化BR膜制作了一种简单的方向传感器。当光扫描传感区域时，每个图案的边缘会根据光的速度和方向产生正或负电流。这些方向传感器对快速移动的物体也有很强的反应，但对速度较慢的物体一点反应都没有。最终，我们用基于PEDET：PSS的导电聚合物/塑料取代了ITO/玻璃。柔性传感器表现出与ITO/玻璃传感器几乎相同的响应，但不能充分响应。蛋白质和导电聚合物的混合传感器将形成大面积的传感系统，并可用于机器人视觉应用。

We designed photosensors based on the bacteriorhodopsin (bR) pigment found in the cell membrane of Halobacteria and showed that motion detection is possible using only one sensing element. The photocell consists of a bR dip-coated thin film and electrolyte sandwiched between glass plates with ITO electrodes. We fabricated a simple direction sensor by patterning the bR films on electrodes. When light scans the sensing area, the edges of each pattern produce a positive or negative current depending on the light's speed and direction. These direction sensors also respond strongly to rapidly moving objects, though not at all to slow ones. Eventually we replaced ITO/glass with conductive polymer/plastic based on PEDET:PSS. The flexible sensor showed almost the same response as ITO/glass sensor, but couldn't sufficiently respond. The hybrid sensor with protein and conductive polymer will lead to large sensing area system and could be utilized for robot vision applications.