Claims
- 1. A microfluidic device, comprising:
a first and second inlet connected to a first and second inlet channel; a main channel connected to said first and second inlet channels; a concentrating fluid flowing into said first inlet channel; and a sample fluid containing a first type of particles distributed in said sample fluid flowing into said second inlet channel, wherein said concentrating fluid and said sample fluid flow in parallel in said main channel such that said fluids form a fluid interface across which sample fluid molecules diffuse into said concentrating solution such that the concentration of said first type of particles in said sample fluid is increased.
- 2. The device of claim 1, wherein said concentrating solution comprises ionic particles.
- 3. The device of claim 1, wherein said concentrating solution comprises ionic particles of significantly larger size than sample fluid molecules.
- 4. The device of claim 1, wherein said concentrating solution comprises an immiscible solution with a chemical affinity for said sample fluid molecules.
- 5. A microfluidic device, comprising:
a first and second inlet connected to a first and second inlet channel; a main channel connected to said first and second inlet channels; a first fluid flowing into first said inlet channel; and a second fluid containing a first and a second size of particles distributed in said sample fluid flowing into said second inlet channel, whereas the average flow speed of said first fluid is different from the average flow speed of said second fluid.
- 6. The device of claim 5, further comprising a permeable membrane between said first and second fluid in said main channel.
- 7. The device of claim 5, wherein first and second fluids are immiscible.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims benefit from U.S. Provisional Patent Application Serial No. 60/281,114, filed Apr. 3, 2001, which application is incorporated herein by reference.
Provisional Applications (1)
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Number |
Date |
Country |
|
60281114 |
Apr 2001 |
US |