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Temperature Variations of Rotational Drag on Ferromagnetic Nanowires in Viscous Fluids
Zhuoyan LiJohns Hopkins University
Department of Physics and AstronomyDr. Alexandre Anguelouch and Dr. Dan Reich
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Purpose
to understand general rheological properties of 2D films
for example: elucidate the fundamental hydrodynamic laws surrounding cell membranes and protein bodies
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Ni Nanowires
<picture/schematic of a still from video>
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Microscope
Microscope setup: Helmhotz coils, temperature probes, Nikon camera, LabView, LiveCell
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Sample preparation
The petri dish contains nanowires in-between an upper layer of silicone oil and a lower layer of glycerol solution
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Graph of Angle vs. Time
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Close Up of High Quality Fit
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Analysis of Data
Movie of a single nanowire which has a step magnetic field applied to it
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Graph of Viscosity vs. Temperature
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Conclusion
There is a clear difference between the viscosity of thin films and bulk fluid
As shown in the analysis of data, the k coefficient fit is very reliable
The slopes of the different solutions are distinct curves which can be reproduced
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Acknowledgements
I would like to thank Dr. Anguelouch for teaching and guiding me through all the protocol and experiments
I would also like to thank Dr. Reich for allowing me to work in his lab and providing me with background information about the research
I want to also thank Stuart and Jim for being so accommodating and always willing to lend a helping hand
Finally, I want to express gratitude towards Mrs. Lonsdale and Dr. Cammarata for providing me with this opportunity in MRSEC