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Published on: February 6, 2014
A multi-axis confocal rheoscope for studying shear flow of structured fluids
Neil Y C Lin1, Jonathan H McCoy2, Xiang Cheng1
1Department of Physics, Cornell University, Ithaca, New York 14853, USA.
Abstract:
We present a new design for a confocal rheoscope that enables uniform uniaxial or biaxial shear. The design consists of two precisely positioned parallel plates with a gap that can be adjusted down to 2 ±0.1 μm, allowing for the exploration of confinement effects. By using our shear cell in conjunction with a biaxial force measurement device and a high-speed confocal microscope, we are able to measure the real-time biaxial stress while simultaneously imaging the material three-dimensional structure. We illustrate the importance of the instrument capabilities by discussing the applications of this instrument in current and future research topics in colloidal suspensions.
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