| Autor: |
Pekas, Nikola, Porter, Marc D., Tondra, Mark, Popple, Anthony, Jander, Albrecht |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 11/15/2004, Vol. 85 Issue 20, p4783-4785, 3p, 2 Diagrams, 2 Graphs |
| Abstrakt: |
This letter describes the integration of giant magnetoresistance (GMR) sensors with a microfluidic system tor the velocity and size monitoring, and enumeration of flowing magnetic entities. We have fabricated a microdevice that enables: (1) controlled formation of picoliter-sized droplets of a ferrofluid separated by a nonmagnetic oil; and (2) continuous-flow sensing of these ferrofluid droplets. It is shown that the flow velocity, droplet size, and droplet-formation frequency can readily he determined from the GMR response. These results are validated by comparisons to fluorescence microscopy data. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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