Electrowetting-on-Dielectric Based Economical Digital Microfluidic Chip on Flexible Substrate by Inkjet Printing.
Electrowetting-on-Dielectric Based Economical Digital Microfluidic Chip on Flexible Substrate by Inkjet Printing.
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DOI：
10.3390/mi11121113
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发表时间：
2020-12-16
期刊：
影响因子：
3.4
通讯作者：
Chen L
中科院分区：
文献类型：
--
作者：
Wang H;Chen L
为了摆脱对昂贵的光刻技术和相关设备的依赖，提出了一种经济、简单的数字微流控(DMF)设计和制造技术。电极图案是通过3D电路板打印机在柔性聚对苯二甲酸乙二醇酯(PET)基板上喷墨打印纳米银导电墨产生的，食品包装膜附着在电极阵列上作为介质层，并喷涂Teflon®AF形成疏水层。本发明的PET基材和食品包装膜成本低，一般用户都能买到。所提出的柔性DMF芯片可以通过更换涂有疏水层的介质膜来实现长时间的重复使用。对银迹的分辨率、导电性以及液滴的接触角和速度进行了测试，结果表明该工艺与传统的DMF制备工艺相当。就DMF的快速成型而言，该技术在不牺牲DMF性能的情况下，在制造成本、制造时间、材料选择和批量生产等方面显示出非常诱人的优势。柔性DMF芯片已成功地在正方形和六边形电极阵列上实现了基本的液滴操作。
In order to get rid of the dependence on expensive photolithography technology and related facilities, an economic and simple design and fabrication technology for digital microfluidics (DMF) is proposed. The electrodes pattern was generated by inkjet printing nanosilver conductive ink on the flexible Polyethylene terephthalate (PET) substrate with a 3D circuit board printer, food wrap film was attached to the electrode array to act as the dielectric layer and Teflon® AF was sprayed to form a hydrophobic layer. The PET substrate and food wrap film are low cost and accessible to general users. The proposed flexible DMF chips can be reused for a long time by replacing the dielectric film coated with hydrophobic layer. The resolution and conductivity of silver traces and the contact angle and velocity of the droplets were evaluated to demonstrate that the proposed technology is comparable to the traditional DMF fabrication process. As far as the rapid prototyping of DMF is concerned, this technology has shown very attractive advantages in many aspects, such as fabrication cost, fabrication time, material selection and mass production capacity, without sacrificing the performance of DMF. The flexible DMF chips have successfully implemented basic droplet operations on a square and hexagon electrode array.
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