固液相転移性材料を用いた剛性可変マイクログリッパの作製

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  • Fabrication of Variable Stiffness Micro Gripper Using Solid-Liquid Phase Transition Materials

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<p>In micromanipulation, stable and low-invasive manipulation of the target object is an important technology. Conventionally, various types of microgrippers with different operating principles such as piezoelectric elements and shape memory alloys have been developed for manipulating biological materials such as microstructures and cells. However, since the operability depends on the shape and rigidity of the target object, it is necessary to use grippers that have suitable shape and rigidity for the target object. Therefore, there is a growing expectation for a novel microgripper that is less affected by the shape and rigidity of the target object. In this paper, we propose the miniaturization of a variable stiffness microgripper using photochromic materials that undergo a solid-liquid phase transition by light, and an increase in the rigidity change rate by changing the coating material. We report achieving a tip size of about 100 μm by adsorbing photochromic materials molded into fine particles onto the tip of a glass capillary, and achieving a rigidity change rate of about 100 times by using a hydrogel as the coating material.</p>

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