This study presents the effects of operating conditions on the dielectrophoretic behavior of polystyrene microparticles under insulator-based DEP (iDEP). Experiments were performed employing microchannels containing insulating structures that worked as insulators. The parameters varied were pH (8-9) and conductivity (25, 50 and 100 μS/cm) of the bulk medium and the magnitude of the applied field (200-850 V/cm). Optimal operating conditions in terms of pH and conductivity of the suspending medium were obtained, and the microdevice performance was characterized in terms of concentration factor and minimum electric field required (minimum energy consumption). This is the first report on improving iDEP processes when electroosmotic flow (EOF) is present and DC electric fields are employed. DEP and EOF have been studied extensively; however, this study integrates the effect of suspending medium characteristics on both electrokinetic phenomena. These findings will allow improving the performance of DC-iDEP microdevices achieving the highest concentration fold with the lowest energy consumption.^
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机译：本研究介绍了在绝缘体基DEP（IDEP）下聚苯乙烯微粒的操作条件对聚苯乙烯微粒的介电电泳行为的影响。采用含有作为绝缘体的绝缘结构的微通道进行实验。变化的参数是pH（8-9）和散装介质的电导率（25,50和100μs/ cm）和所施加的场的大小（200-850 v / cm）。获得了pH的pH和悬浮培养基的电导率的最佳操作条件，并且在所需的浓度因子和最小电场（最小能耗）方面表征了微生物性能。这是当存在电渗流量（EOF）时改进IDEP进程的第一个报告，并且使用DC电场。 DEP和EOF已被广泛研究;然而，该研究整合了悬浮媒体特征对诸如电动现象的影响。这些发现将允许提高DC-IDEP Microdevices的性能，以实现最低能耗的最高浓度折叠。^
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