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| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Exhibition Hall 2 |
| Time |
4월 19일 (금요일) 11:00~12:30 |
| Code |
MAT.P-420 |
| Subject |
Interdigitated electrodes pattern for liquid dielectrophoresis paper chip. |
| Authors |
Sooyong Park, Veasna Soum, Oh-Sun Kwon, Kwanwoo Shin*
Department of Chemistry, Sogang University, Korea
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| Abstract |
In paper-based DMF chip using Electrowetting on dielectric layer, all droplet manipulations are effective only when fluids are operated between two dielectric layers with channel gaps less than 300 μm to reduce the surface tension of droplet. As a result, the liquid volumes are confined to several microliters at most. Moreover, EWOD only works with polar molecules like water and has weak force.
To solve these issues, dielectrowetting is applied to achieve creating, transporting, splitting and merging of droplets in open space and with non-polar molecules. If the electric field is applied in the opposite direction of the droplet is uniform, the magnitudes of the electrostatic forces applied on particles are same, so the net force applied on the particles becomes zero and the particles do not move. However, If the electric field applied on the particles is not uniformed, the magnitude of the electrostatic forces applied on the particles are different from each other, then the particles move to part where the density of electric field is high due to the gradient of the electric field. Therefore, in the interdigitated electrodes, due to difference of electric field density, liquid dielectrophoresis occurs.
Therefore, the use of liquid dielectrophoresis force can easily control the various motions of droplet underlying chemical reactions on paper based open DMF chips.
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| E-mail |
qkrtndyd111@naver.com |
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123rd General Meeting of the KCS