Journal
MICROMACHINES
Volume 9, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/mi9020050
Keywords
micro-robot; three-dimension manipulation; microfluidic chip
Categories
Funding
- Beihang University, Zhuobai project [ZG216S1751]
- Natural Science Foundation of Beijing [17L20128]
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We present a novel method for the three-dimensional (3D) control of microrobots within a microfluidic chip. The microrobot body contains a hollow space, producing buoyancy that allows it to float in a microfluidic environment. The robot moves in the z direction by balancing magnetic and buoyancy forces. In coordination with the motion of stages in the xy plane, we achieved 3D microrobot control. A microgripper designed to grasp micron-scale objects was attached to the front of the robot, allowing it to hold and deliver micro-objects in three dimensions. The microrobot had four degrees of freedom and generated micronewton-order forces. We demonstrate the microrobot's utility in an experiment in which it grips a 200 m particle and delivers it in a 3D space.
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