File:HKU-HKBU ass f1a.PNG

Fig. 1a: Photos of the microchips for micro-motor installation: A: A photo showing the chambers and the valve systems B: Valve 3 closed. C: Valves 4, 5, 6 and 7 are closed while water is injected into the channel L: Valve 1 and 7 closed, enclosing the crystal violet solution in the lower 4 chambers. P: The photo of the chamber system.