Zaman Mohammad Asif, Wu Mo, Ren Wei, Hesselink Lambertus
Department of Electrical Engineering, Stanford University, Stanford, California 94305, USA.
Appl Phys Lett. 2024 Jul 29;125(5):051108. doi: 10.1063/5.0223354. Epub 2024 Aug 1.
An impedance analysis for optically induced dielectrophoresis is presented. A circuit model is developed for this purpose. The model parameters are fully defined in terms of the geometrical and material properties of the system. It is shown that trapping force can only be generated when the material properties follow certain impedance matching conditions. The factor is introduced to succinctly quantify the phenomenon. It is used to calculate bounds on the allowed electrical conductivity of the suspension medium. Results from the proposed model are found to be in good agreement with full-wave numerical simulations. By computing the acceptable set of material parameters with little computational cost, the presented analysis can streamline ODEP system design for various applications.
本文提出了一种用于光诱导介电泳的阻抗分析方法。为此开发了一个电路模型。该模型参数根据系统的几何和材料特性完全确定。结果表明，只有当材料特性满足一定的阻抗匹配条件时，才能产生捕获力。引入了该因子以简洁地量化这一现象。它用于计算悬浮介质允许电导率的界限。所提出模型的结果与全波数值模拟结果吻合良好。通过以很少的计算成本计算可接受的材料参数集，本文的分析可以简化用于各种应用的光诱导介电泳系统设计。
