Fig. 2.

Fig. 2. Capacity of the valve in the microfluidic detection system. (A) Schematic of the system used to test the microvalve. The inlet and outlet of the chip were connected to the positive pole of a power supply (3.3 V constant voltage) and an oscilloscope, respectively. When the valve was open, the KCl solution formed a loop with the power supply system and the voltage was measured by the oscilloscope. When the valve was closed, the solution was blocked, the loop was broken, and the voltage value became 0. (B) Schematic and micrograph of the ON and OFF state of the valve. When the valve was opened, the magenta solution passed through and filled the microchannel. When the valve was closed, the magenta solution was blocked, and the red solution was detected in the downstream portion of the microchannel. Scale bar = 1 mm. (C) Voltage variation when the plug was ON and OFF. When the valve was pressed down, the voltage decreased to almost 0, which indicated the blocking capacity of the valve.

© J. Microbiol. Biotechnol.