Droplet Velocity in an Electrowetting on Dielectric Digital Microfluidic Device
In many electrowetting on dielectric (EWOD) based microfluidics devices, droplet actuation speed is a crucial performance-controlling parameter. Our present study aims to characterize and study droplet speed in a typical EWOD device. First, a practical droplet speed measurement method has been metho...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-04-01
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| Series: | Micromachines |
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| Online Access: | http://www.mdpi.com/2072-666X/7/4/71 |
| _version_ | 1819275064716034048 |
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| author | Mun Mun Nahar Jagath B. Nikapitiya Seung M. You Hyejin Moon |
| author_facet | Mun Mun Nahar Jagath B. Nikapitiya Seung M. You Hyejin Moon |
| author_sort | Mun Mun Nahar |
| collection | DOAJ |
| description | In many electrowetting on dielectric (EWOD) based microfluidics devices, droplet actuation speed is a crucial performance-controlling parameter. Our present study aims to characterize and study droplet speed in a typical EWOD device. First, a practical droplet speed measurement method has been methodically demonstrated and some related velocity terms have been introduced. Next, influence of electrode shape on droplet speed has been studied and a new design to enhance droplet speed has been proposed and experimentally demonstrated. Instead of using square shaped electrodes, rectangular electrodes with smaller widths are used to actuate droplets. Additionally, different schemes of activating electrodes are studied and compared for the same applied voltage. The experiments show that a particular scheme of activating the array of rectangular electrodes enhances the droplet speed up to 100% in comparison to the droplet speed in a conventional device with square shaped electrodes. |
| first_indexed | 2024-12-23T23:18:23Z |
| format | Article |
| id | doaj.art-610f977349db4d5d87161fe8d8dc979f |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-12-23T23:18:23Z |
| publishDate | 2016-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-610f977349db4d5d87161fe8d8dc979f2022-12-21T17:26:25ZengMDPI AGMicromachines2072-666X2016-04-01747110.3390/mi7040071mi7040071Droplet Velocity in an Electrowetting on Dielectric Digital Microfluidic DeviceMun Mun Nahar0Jagath B. Nikapitiya1Seung M. You2Hyejin Moon3Department of Mechanical and Aerospace Engineering, The University of Texas at Arlington, Arlington, TX 76019, USADepartment of Mechanical and Aerospace Engineering, The University of Texas at Arlington, Arlington, TX 76019, USADepartment of Mechanical Engineering, The University of Texas at Dallas, Richardson, TX 75080, USADepartment of Mechanical and Aerospace Engineering, The University of Texas at Arlington, Arlington, TX 76019, USAIn many electrowetting on dielectric (EWOD) based microfluidics devices, droplet actuation speed is a crucial performance-controlling parameter. Our present study aims to characterize and study droplet speed in a typical EWOD device. First, a practical droplet speed measurement method has been methodically demonstrated and some related velocity terms have been introduced. Next, influence of electrode shape on droplet speed has been studied and a new design to enhance droplet speed has been proposed and experimentally demonstrated. Instead of using square shaped electrodes, rectangular electrodes with smaller widths are used to actuate droplets. Additionally, different schemes of activating electrodes are studied and compared for the same applied voltage. The experiments show that a particular scheme of activating the array of rectangular electrodes enhances the droplet speed up to 100% in comparison to the droplet speed in a conventional device with square shaped electrodes.http://www.mdpi.com/2072-666X/7/4/71electrowetting on dielectric (EWOD)digital microfluidicsdroplet speedswitching timevelocity measurementslender electrodes |
| spellingShingle | Mun Mun Nahar Jagath B. Nikapitiya Seung M. You Hyejin Moon Droplet Velocity in an Electrowetting on Dielectric Digital Microfluidic Device Micromachines electrowetting on dielectric (EWOD) digital microfluidics droplet speed switching time velocity measurement slender electrodes |
| title | Droplet Velocity in an Electrowetting on Dielectric Digital Microfluidic Device |
| title_full | Droplet Velocity in an Electrowetting on Dielectric Digital Microfluidic Device |
| title_fullStr | Droplet Velocity in an Electrowetting on Dielectric Digital Microfluidic Device |
| title_full_unstemmed | Droplet Velocity in an Electrowetting on Dielectric Digital Microfluidic Device |
| title_short | Droplet Velocity in an Electrowetting on Dielectric Digital Microfluidic Device |
| title_sort | droplet velocity in an electrowetting on dielectric digital microfluidic device |
| topic | electrowetting on dielectric (EWOD) digital microfluidics droplet speed switching time velocity measurement slender electrodes |
| url | http://www.mdpi.com/2072-666X/7/4/71 |
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