A CMOS Microsystem Combining Magnetic Actuation and In-Situ Optical Detection of Microparticles

We present a CMOS-based hybrid microfluidic system that combines the manipulation of magnetic microparticles through a magnetic field with in situ optical detection via single photon avalanche diodes (SPADs). Magnetic particles are actuated within a glass micro-capillary and are detected upon passage over the SPAD, where they block incident light and thus lower the photon count. The optical sensors, which are not influenced by the magnetic actuation forces, allow detecting the presence of magnetic particles of 30, 5 and 1 µm diameter, while being able to distinguish between different sizes.


Published in:
TRANSDUCERS 2007 - 2007 International Solid-State Sensors, Actuators and Microsystems Conference, 2493-2496
Presented at:
14th International Conference on Solid-State Sensors, Actuators and Microsystems/21st European Conference on Solid-State Transducers, Lyon, June 10-14, 2007
Year:
2007
Keywords:
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 Record created 2008-06-27, last modified 2018-09-13

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