Novel Permanent Magnets Based on Nanowire Assemblies

Abstract

An efficient heat activating mediator with an enhanced specific absorption rate (SAR) value is attained via control of the iron oxide (Fe3O4) nanoparticle size from 3 to 32 nm. Monodispersed Fe3O4 nanoparticles are synthesized via a seed-less thermolysis technique using oleylamine and oleic acid as the multifunctionalizing agents (surfactant, solvent and reducing agent). The inductive heating properties asa function of particle size reveal a strong increase in the SAR values with increasing particle size up to 28 nm. In particular, the SAR values of ferromagnetic nanoparticles (416 nm) are strongly enhanced with the increase of ac magnetic field amplitude than that for the superparamagnetic (316 nm) nanoparticles.

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Document Details

Document Type
Technical Report
Publication Date
Oct 02, 2018
Accession Number
AD1068774

Entities

People

  • Ping Liu

Organizations

  • University of Texas at Arlington

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Aspect Ratio
  • Assembly
  • Coercivity
  • Couplings
  • Crystal Structure
  • Magnetic Fields
  • Magnetic Materials
  • Magnetic Properties
  • Nanoparticles
  • Nanostructures
  • Nanowires
  • Packing Density
  • Particle Size
  • Particles
  • Permanent Magnets
  • Physical Properties

Readers

  • Nanocomposite Materials Science
  • Superconducting Magnet Technology

Technology Areas

  • Biotechnology