- 作者：Shiraz SohailaAuthor Vitae ; Ershad Ali MistribAuthor Vitae ; Afzal KhanbAuthor Vitae ; Susanta BanerjeebAuthor Vitae ; Karabi Biswasa ; karabi@ee.iitkgp.ernet.in" class="auth_mail" title="E-mail the corresponding author ; biswas.karabi@gmail.com" class="auth_mail" title="E-mail the corresponding authorAuthor Vitae
- 关键词：BST/Teflon nanocomposite thin film ; Electrowetting-on-dielectric (EWOD) ; Digital microfluidics (DMF) ; Lab-on-chip (LOC) ; Low voltage EWOD
- 刊名：Sensors and Actuators A: Physical
- 出版年：2016
- 出版时间：1 February 2016
- 年：2016
- 卷：238
- 期：Complete
- 页码：122-132
- 全文大小：3215 K
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A nanocomposite thin film of Barium Strontium Titanate (BST) and Teflon®AF is synthesized to make a low voltage operation electrowetting-on dielectric (EWOD) device.
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Analysis by conventional film characterization techniques show smooth, uniform and crack free hydrophobic film (contact angle ≈ 115°) with high dielectric constant (ɛr ≈ 9.1).
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We fabricated EWOD devices with the nanocomposite thin film, and demonstrated contact angle modulation, droplet oscillation, and droplet transport (three most common operation of digital microfluidic devices).
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The device is able to transport liquid droplet of 5 μl on coplanar electrodes at 30 V, and does not require an additional top hydrophobic layer.
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The work avoids expensive and complex procedure of EWOD device fabrication, and can be done in low temperature (80 °C) only. Hence low melting point substrate and electrode material can be used for device, which makes fabrication economical.