Multi-functional manipulations of microobjects based on electrolysis of water

The micromanipulation technology still faces some challenges. Direct rotary step-driving of a microobject has not been realized by physical means. The implementation of 3-D attitude adjustment of a microobject usually involves a complicated driving and controlling system. The capability and controllability of releasing sticky microobjects from a probe is still limited. In this paper, we demonstrate a strategy to use hydrogen bubbles generated by electrolysis of water to manipulate microobjects in water on a substrate surface. Manipulation functions implemented by this strategy include direct rotary step-driving and attitude adjustment of a single microparticle, and controlled release of a single sticky microparticle.

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