| 학회 |
한국화학공학회 |
| 학술대회 |
2005년 봄 (04/22 ~ 04/23, 여수대학교) |
| 권호 |
11권 1호, p.771 |
| 발표분야 |
이동현상 |
| 제목 |
Flow visualization of dilute colloidal suspension in PDMS microfluidic chip applying particle streak method |
| 초록 |
A slit-like flow channel was designed to allow for fluorescent microscope visualization in the microfluidic chip fabricated with glass substrate and polydimethylsiloxane (PDMS). For the exposure time, moving fluorescent polystyrene latexes of one micrometer radius result in image streaks, where the latex concentration is sufficiently dilute underlying the condition of simple fluid. Applying the data processing method for particle streak imaging developed ourselves, the linear velocity of particle at the lateral position of the channel was determined in terms of a ratio of the real distance to the number of pixels. It is obvious that the velocity profile of suspension depends on the surface properties of the microchannel wall. The reliability of the velocity profile determined by the flow imaging is justified by comparing with the measured volumetric flow rate. We recognized the behavior of fluid slip in velocity profiles at the hydrophobic surface of PDMS wall. The slip length inferred from the experimental results was evaluated ranging 6 to 8 μm. |
| 저자 |
이태석1, 전명석1, 이강택2
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| 소속 |
1한국과학기술(연), 2연세대 |
| 키워드 |
Particle streak; Microfluidic chip; Colloidal suspension; Slip velocity; Fluorescent microscope; Surface potential
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| E-Mail |
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| 원문파일 |
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