Department of Chemistry and Biochemistry, Arizona State University, Tempe 85287-1604, USA.
Electrophoresis. 2011 Sep;32(17):2292-7. doi: 10.1002/elps.201100034. Epub 2011 Aug 8.
Insulator-based dielectrophoresis (iDEP) is a powerful tool for separating and characterizing particles, yet it is limited by a lack of quantitative characterizations. Here, this limitation is addressed by employing a method capable of quantifying the DEP mobility of particles. Using streak-based velocimetry the particle properties are deduced from their motion in a microfluidic channel with a constant electric field gradient. From this approach, the DEP mobility of 1 μm polystyrene particles was found to be -2±0.4 10(-8) cm4 /(V2 s). In the future, such quantitative treatment will allow for the elucidation of unique insights and rational design of devices.
基于绝缘子的介电泳（iDEP）是一种用于分离和表征粒子的强大工具，但它受到缺乏定量描述的限制。在这里，通过采用一种能够定量描述粒子介电泳迁移率的方法来解决这一限制。通过基于条纹的速度测量法，从粒子在具有恒定电场梯度的微流道中的运动中推导出粒子的性质。通过这种方法，发现 1 μm 聚苯乙烯粒子的介电泳迁移率为-2±0.4×10(-8) cm4 /(V2 s)。在未来，这种定量处理将允许阐明独特的见解和设备的合理设计。
