The surface tension driven flow characteristics should be considered for the initial priming of microfluidic chips with the hydrophilic or hydrophobic surfaces. The hydrophobic capillaries have been prepared by exposing the hydrophilic glass capillaries to pure hexadecane and an octadecyltrichlorosilane (OTS) solution. The displacements and velocities of fluid menisci in two kinds of tubes are measured while changing the inlet pressures. Numerical solutions of fluidic equation show a comparable agreement with experimental results when considering the surface tension. It is also shown that partially coated hydrophobic region of capillary could be used as a passive valve.
|Title of host publication
|2nd Annual International IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine and Biology - Proceedings
|Institute of Electrical and Electronics Engineers Inc.
|Number of pages
|Published - 2002
|2nd Annual International IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine and Biology - Madison, United States
Duration: 2002 May 2 → 2002 May 4
|2nd Annual International IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine and Biology
|02/5/2 → 02/5/4
- hydrophilic channel
- hydrophobic channel
- Surface tension
ASJC Scopus subject areas
- Microbiology (medical)