Journal
OPTICS EXPRESS
Volume 18, Issue 8, Pages 7611-7616Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.007611
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- Swinburne University of Technology through the Swinburne University
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We present an optical tweezer sensor for shear stress mapping in microfluidic systems of different internal geometries. The sensor is able to measure the shear stress acting on microspheres of different sizes that model cell based biological operations. Without the need for a spatial modulator or a holographic disk, the sensor allows for direct shear stress detection at arbitrary positions in straight and curved microfluidic devices. Analytical calculations are carried out and compared with the experimental results. It is observed that a decrease in the microsphere size results in an increase in the shear stress the particle experiences. (C) 2010 Optical Society of America
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