temperature variations of rotational drag on ferromagnetic nanowires in viscous fluids
DESCRIPTION
Temperature Variations of Rotational Drag on Ferromagnetic Nanowires in Viscous Fluids. Zhuoyan Li Johns Hopkins University Department of Physics and Astronomy Dr. Alexandre Anguelouch and Dr. Dan Reich. Purpose. to understand general rheological properties of 2D films - PowerPoint PPT PresentationTRANSCRIPT
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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