基于介电泳的电旋转芯片电极结构优化与仿真

针对电旋转芯片不同形状的电极结构进行了旋转力矩分析。首先分析了电旋转模型的电场,建立了旋转电场的力矩数学模型;然后主要对凹圆形、方形、双曲线和三角形四种电极结构形成的旋转电场,利用COMSOL Multiphysics进行了有限元仿真分析,分析比较了四种电极结构的电场有效因子和旋转电场质量因子Q。仿真结果表明,双曲线形的电极结构形成的电场强度较强,旋转力矩较为平稳,是四种结构中最理想的旋转电极。

Optimization and simulation of electrode structure for electrorotation chip based on dielectrophoresis

In this paper, rotational torque analysis for different electrode geometries of electrorotation chip is present. First, the electric field of the rotating model was analyzed, and the mathematical model of torque was established. Finite element simulations of the rotating electric field produced by concave circular, square, triangular and hyperbolic electrode geometries were simulated using COMSOL Multiphysics. Then the efficiency factor and the quality factor Q of rotating electric field were calculated and compared among the four electrodes. These simulations indicate that hyperbolic electrode produce greater higher electric fields and also generate stable values of rotational torque relatively. Consequently, hyperbolic electrode is ideal structure in the four electrode geometries.