Dynamic Sensing of Liquid Droplet in Electrowetting Devices

Sohail, Shiraz; Biswas, Karabi

doi:10.1166/sl.2015.3521

Cited by 6 publications

(4 citation statements)

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“…The droplet is surrounded by open air. For actuating the droplet, 40 V DC supply is applied from an in-house developed power circuit [7]. Computer interfaced high speed camera with macro zoom lens is adjusted for recording top view of the droplet during the experiment.…”

Section: Device Fabrication and Testingmentioning

confidence: 99%

“…Standard micro‐fabrication process is adopted to fabricate the device. To make coplanar electrodes, aluminium thin film is deposited on a glass substrate by a thermal deposition process, followed by patterning of electrodes by conventional photolithography using positive photoresist [7]. In the next step, BST/Teflon nanocomposite thin film is spin coated on the electrodes [2, 17].…”

Section: Device Fabrication and Testingmentioning

confidence: 99%

“…The video of droplet dynamics is analysed by ImageJ analysis software. The experiment is conducted at

17 ° normalC

[7].…”

Section: Device Fabrication and Testingmentioning

confidence: 99%

“…Several designs for coplanar electrodes have been demonstrated, viz., flat rectangular or square [2, 7], interdigitated finger [8, 9], two half‐circular [10], crescent [11], and recently reported partially filled electrodes [12]. Yi and Kim proposed an electrode shape for droplet contact angle modulation experiment, but droplet transport was not demonstrated [13].…”

Section: Introductionmentioning

confidence: 99%

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Jigsaw electrode design for electrowetting devices

Sohail¹,

Jaffery²,

Biswas³

2019

Micro & Nano Letters

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A new type of electrode design (jigsaw in shape) is presented for actuating inner electrodes in electrowetting-on-dielectric devices containing large two-dimensional array of electrodes. Electrodes are diagonally connected with one external pin to the voltage supply. Each electrode-pad is made by carving (or cutting) out two triangular sections from the sides and adding two triangular sections on the top and bottom of the traditional square electrode. This modification in electrode shape creates an imbalance of electromechanical force at the three-phase contact line on applying the supply voltage to the actuating electrode. Droplet moves towards either horizontal or vertical directions depending on the direction of the dominant force. The scheme requires a single layer of metal thin film deposition for device fabrication and also reduces the number of external pin connections to the power supply.

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Section: Device Fabrication and Testingmentioning

confidence: 99%

Section: Device Fabrication and Testingmentioning

confidence: 99%

“…The video of droplet dynamics is analysed by ImageJ analysis software. The experiment is conducted at