Fig. 4: Monitoring shadow path.
From: Kinetic photovoltage along semiconductor-water interfaces
a Photography of a silicon array capped with hydrogel to sense the path of a walking Cubaris. The motion blur records the Cubaris tail, one frame per second. b Recorded voltage curves from silicon strips while the Cubaris walks under light illumination of 1-sun intensity. Each colored curve corresponds to the silicon strip marked by a spot of the same color in a. Left electrodes of silicon strips are connected to the positive ends of a multi-channel voltmeter.
