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Rotating Pulsed Magnetic Field Design and a Pulsed Field Study of Nanoparticle Phase Dynamics

Rotating Pulsed Magnetic Field Design and a Pulsed Field Study of Nanoparticle Phase Dynamics. By J. Nick Moore. Magnetic Hyperthermia vs. Nanodrills.

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Rotating Pulsed Magnetic Field Design and a Pulsed Field Study of Nanoparticle Phase Dynamics

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  1. Rotating Pulsed Magnetic Field Design and a Pulsed Field Study of Nanoparticle Phase Dynamics By J. Nick Moore

  2. Magnetic Hyperthermia vs. Nanodrills • Magnetic Hyperthermia: Superparamagnetic nanoparticles absorb power from AC magnetic fields and heat surrounding tissue via Neel and Brownian relaxation • Nanodrills: Magnetic nanorodscut through surrounding tissue cells as they rotate in the presence of a high-frequency rotating magnetic field

  3. Nested Helmholtz Coil

  4. Single Coil RLC Circuit

  5. Rotating Magnetic Field Model

  6. Faraday Rotation EMG 707 nanoparticle solution

  7. Dynamic Light Scattering Results • EMG 707 nominal particle diameter: 10nm

  8. Conclusions • There is a relative increase in phase delay as nanoparticle concentration increases • This may be due to stronger dipole-dipole interactions as particle spacing shrinks • Or it may be due to longer relaxation times of aggregates that are forming at higher concentrations • There is a relative phase decrease as the magnetic pulse diminishes and cycles through more peaks • This may be evidence of the system becoming more ordered through consecutive exposure to field peaks, allowing it to respond more quickly

  9. Potatoes come in purple!?

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