双胞胎结构介电湿润芯片的设计与实验

doi:10.3969/j.issn.0253-2778.2018.11.010

中国科学技术大学学报 ›› 2018, Vol. 48 ›› Issue (11): 943-948.DOI: 10.3969/j.issn.0253-2778.2018.11.010

双胞胎结构介电湿润芯片的设计与实验

许晓威，张玉良

衢州学院机械工程学院,浙江衢州 324000

收稿日期:2018-03-27 修回日期:2018-05-24 接受日期:2018-05-24 出版日期:2018-11-30 发布日期:2018-05-24
通讯作者: 许晓威
作者简介:许晓威(通讯作者),男,1984年生,博士/讲师.研究方向:数字微流控芯片及相关技术.E-mail: 851597503@qq.com
基金资助:
浙江省自然科学基金项目（LQ16E050008），国家自然科学基金（51876103）资助.

Design and experiment of twin plate device based on electrowetting-on-dielectric actuation

XU Xiaowei, ZHANG Yuliang

College of Mechanical Engineering, Quzhou University, Quzhou 324000, China

Received:2018-03-27 Revised:2018-05-24 Accepted:2018-05-24 Online:2018-11-30 Published:2018-05-24

摘要/Abstract

摘要： 基于介电湿润效应的数字微流控技术在操作单个微液滴方面所表现出的独特优势使其已在生物、医学及化学等领域得到了广泛关注与应用.数字微流控芯片中较高的驱动电压不但容易使芯片的介电层被击穿，而且较强的电场会给液滴中的活性物质带来不可逆的损伤，因此，降低介电湿润芯片的驱动电压是很有必要的.通过理论分析得到由2块相同单极板共平面芯片构成的双胞胎结构芯片不但能获得较大的介电驱动力，而且临界驱动电压更低.实验结果表明采用双胞胎结构设计的芯片不仅能提高液滴的平均运动速度，而且可以有效地降低驱动电压，特别是在较低驱动电压时可获得更优的液滴驱动效果.

关键词: 数字微流控技术, 介电湿润机理, 驱动电压, 液滴平均速度

Abstract: Digital microfluidics based on electrowetting on dielectric is an emerging popular technology that manipulates single droplets. It has shown enormous advantages in biology, medicine and chemistry and so on, where it has been used extensively. However, the higher driving voltage of digital microfluidic devices not only causes the dielectric layer of the chip to be broken down, but the strong electric field can cause irreversible damage to the active material in the droplet. Therefore, it is necessary to reduce the driving voltage of the digital microfluidic device. Compared with the two plate structure, the twin plate device composed of two identical coplanar electrodes was obtained by theoretical analysis, which can not only achieve greater driving force, but also lower the threshold driving voltage. The experimental results demonstrate that the twin plate structure can improve the average velocity of droplets and reduce the driving voltage effectively. Especially, in the lower driving voltage a better droplet driving effect can be obtained with the twin plate structure.

Key words: digital microfluidics, electrowetting on dielectric, driving voltage, average droplet velocity

中图分类号:

TH69

许晓威，张玉良. 双胞胎结构介电湿润芯片的设计与实验[J]. 中国科学技术大学学报, 2018, 48(11): 943-948.

XU Xiaowei, ZHANG Yuliang. Design and experiment of twin plate device based on electrowetting-on-dielectric actuation[J]. Journal of University of Science and Technology of China, 2018, 48(11): 943-948.

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双胞胎结构介电湿润芯片的设计与实验

Design and experiment of twin plate device based on electrowetting-on-dielectric actuation

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