誘電泳動用電極集積化マイクロ流体デバイスによる微粒子選別技術の検討

抄録

Micro-order particle sorting technology is essential for research applications in the chemical, environmental, and biomedical fields, as well as in various industrial sectors. Many microfluidic devices have been proposed to sort and collect microparticles in the liquid phase. On the other hand, there are not many microfluidic devices for sorting and collecting particles in the gas phase, such as PM2.5 and other dust particles. In our previous study, we successfully developed an electrostatic precipitation technique that uses dielectrophoretic forces to retain microbeads in the gas phase. In this study, we will integrate the dielectrophoresis electrodes into a microfluidic device and apply them as a particulate sorting and selection.

Microbeads flow across the channel. Since the shear force of the fluid depends on the flow velocity, by using a microfluidic device that changes the cross-sectional area of the channel, the shear force of the fluid is varied while crossing multiple electrostatic precipitators so that only particles whose forces are balanced against each other are retained on the electrodes. Theoretically, only microbeads of arbitrary mass and diameter can be retained by controlling the flow velocity and dielectrophoretic force. We are aiming for practical application as a technology that enables the sorting and collection of microbeads.