| 학회 |
한국화학공학회 |
| 학술대회 |
2011년 봄 (04/27 ~ 04/29, 창원컨벤션센터) |
| 권호 |
17권 1호, p.686 |
| 발표분야 |
이동현상 |
| 제목 |
Actuation of Pneumatic Valves for Trapping and Releasing Droplets |
| 초록 |
Droplet-based microfluidic systems are of practical use for controlling chemical reactions and for transporting and manipulating chemical or biological materials at the nanoliter or picoliter scales. As one of droplet manipulations in the microfluidic devices, we demonstrated active droplet trapping and releasing using actuation of pneumatic valves in double-layer microfluidic devices. Uniform emulsion droplets were trapped at the junction of flow and control channels due to the expansion of flow channel into control valve channel. As long as shape of droplets was deformed in confined microchannels and flow rate of oil phase was relatively slow, the droplets were trapped in the expanded valve region because they can be restored into more spherical shape so that their surface energies become reduced. However, by applying pressurized gas to the control channels, expanded region underneath pneumatic valves was disappeared. Therefore, the trapped droplets could be released by actuating the pneumatic valves on demand. |
| 저자 |
최재훈1, 이기라2, 임종민3, 양승만1
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| 소속 |
1한국과학기술원 광자유체집적소자연구단 / 한국과학기술원 생명화학공학과, 2충북대, 3한국과학기술원 광자유체집적소자연구단 / 한국과학기술원 생명화학공학과 |
| 키워드 |
Microfluidics; Droplet; Pneumatic valve
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| E-Mail |
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| 원문파일 |
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