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25 September 2017 Optically driven colloidal microscopic Taylor-Couette cell (Conference Presentation)
Antonio Ortiz-Ambriz, Pietro Tierno
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Proceedings Volume 10347, Optical Trapping and Optical Micromanipulation XIV; 103471R (2017) https://doi.org/10.1117/12.2275610
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States
Abstract
We present an optically driven colloidal microscopic rheometer based on the recent work of Williams et al. The interplay between magnetic and optical forces allows us to experimentally build a two dimensional Taylor-Couette cell and to explore the rheological properties of confined colloidal suspensions at a microscopic scale. Despite the discrete nature of the system, we observe local instabilities in the response of the layers’ flow to the applied shear, which is a characteristic of shear banding in larger systems. Besides the rheological phenomena, these type of experiments can be useful to develop the understanding of non-equilibrium many body systems.
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Antonio Ortiz-Ambriz and Pietro Tierno "Optically driven colloidal microscopic Taylor-Couette cell (Conference Presentation)", Proc. SPIE 10347, Optical Trapping and Optical Micromanipulation XIV, 103471R (25 September 2017); https://doi.org/10.1117/12.2275610
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KEYWORDS
Magnetism
Particles
Active optics
Mechanics
Optical tweezers
Particle systems
Physics
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