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Electrostatic Origins of the Positive and Negative Charging Difference in the Contact Charge Electrophoresis of a Water Droplet
Langmuir ( IF 3.7 ) Pub Date : 2017-11-21 00:00:00 , DOI: 10.1021/acs.langmuir.7b03281 Seok Hwan Yang 1 , Do Jin Im 1
Langmuir ( IF 3.7 ) Pub Date : 2017-11-21 00:00:00 , DOI: 10.1021/acs.langmuir.7b03281 Seok Hwan Yang 1 , Do Jin Im 1
Affiliation
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The positive and negative charging difference in the contact charge electrophoresis of a water droplet suspended in oil was investigated to find out the origin of this charging difference. Through numerous experiments and numerical analysis, the charging difference has been found to be mainly originated from electrostatic sources. Two electrostatic sources were found in the present experimental setup, and by excluding those two sources the charging difference was successfully diminished. The present findings well explain previous experimental results and also provide design guidelines for consistent droplet movement control in contact charge electrophoresis-based digital microfluidic systems. Finally, further discussions on the obtained results, its implications, and future work are discussed.
中文翻译：
水滴接触电荷电泳中正负电荷差异的静电起源
研究了悬浮在油中的水滴在接触电荷电泳中的正负电荷差异，以找出该电荷差异的起因。通过大量的实验和数值分析，发现电荷差主要来自静电源。在当前的实验装置中发现了两个静电源，并且通过排除这两个源，成功地减小了电荷差。本发现很好地解释了以前的实验结果，并为基于接触电荷电泳的数字微流控系统中一致的液滴运动控制提供了设计指导。最后，讨论了对获得的结果，其含义和未来工作的进一步讨论。
更新日期：2017-11-22
中文翻译：
水滴接触电荷电泳中正负电荷差异的静电起源
研究了悬浮在油中的水滴在接触电荷电泳中的正负电荷差异，以找出该电荷差异的起因。通过大量的实验和数值分析，发现电荷差主要来自静电源。在当前的实验装置中发现了两个静电源，并且通过排除这两个源，成功地减小了电荷差。本发现很好地解释了以前的实验结果，并为基于接触电荷电泳的数字微流控系统中一致的液滴运动控制提供了设计指导。最后，讨论了对获得的结果，其含义和未来工作的进一步讨论。
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