T1602-1-4 エレクトロウェッティングを利用した液滴の生成デバイスの研究([T1602-1]マイクロナノ理工学:nmからmmまでの表面制御とその応用(1))

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This paper describes droplet creation and transfer onto a single substrate using Electrowetting on Dielectric (EWOD). The EWOD actuation enables manipulation of discrete liquid droplet on a single substrate with an array of control electrodes, and recently attracts the considerable attention as a key technology for droplet based digital microfulidics. In the droplet generator, a small droplet is created from the liquid stored in on-chip reservoir. The droplet needs to be sandwiched between two parallel plates to increase the pressure of the droplet. When the control electrodes on the left and right sides of the droplet are energized, the droplet is elongated and necking occurs in the middle, which results in cutting of the droplet. A2-1.1.1 droplet was successfully split with 80 V applied voltage. When the droplet is transferred from the generator between two plates to a single substrate, the droplet is often trapped at the end of the top plate of the generator. In order to prevent the trap, the top plate of the generator was inversely tapered. When the gap of two plates at the end of the generator was greater than 90% of the height of the droplet, droplet could be passed and transferred onto the single substrate.
一般社団法人日本機械学会の論文
2010-09-04