Compact Surface Plasmon Resonance Sensor for Underwater Chemical Sensing Robot

Figure 12

Schematic diagrams of the experimental setups for examining the sampling volume of the SPR sensor. (a) 1.5 M ascorbic acid solution was released from a tube tilted by 50°. The suction tube of the sensor was placed horizontally. (b) 150 mM ascorbic acid solution was released from a tube with its tip pointing upward. The tip of the suction tube of the sensor was pointed downward. Gray arrows indicate the flow of the ascorbic acid solution.

(a)

(b)