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Title: Gram scale synthesis of Fe/Fe xO y core–shell nanoparticles and their incorporation into matrix-free superparamagnetic nanocomposites

In this paper, significant reductions recently seen in the size of wide-bandgap power electronics have not been accompanied by a relative decrease in the size of the corresponding magnetic components. To achieve this, a new generation of materials with high magnetic saturation and permeability are needed. Here, we develop gram-scale syntheses of superparamagnetic Fe/Fe xO y core–shell nanoparticles and incorporate them as the magnetic component in a strongly magnetic nanocomposite. Nanocomposites are typically formed by the organization of nanoparticles within a polymeric matrix. However, this approach can lead to high organic fractions and phase separation; reducing the performance of the resulting material. Here, we form aminated nanoparticles that are then cross-linked using epoxy chemistry. The result is a magnetic nanoparticle component that is covalently linked and well separated. By using this ‘matrix-free’ approach, we can substantially increase the magnetic nanoparticle fraction, while still maintaining good separation, leading to a superparamagnetic nanocomposite with strong magnetic properties.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Report Number(s):
SAND-2018-5581J
Journal ID: ISSN 0884-2914; applab; 663407
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Journal of Materials Research
Additional Journal Information:
Journal Name: Journal of Materials Research; Journal ID: ISSN 0884-2914
Publisher:
Materials Research Society
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; composite; magnetic; nanostructure
OSTI Identifier:
1444097

Watt, John Daniel, Bleier, Grant C., Romero, Zachary William, Hance, Bradley G., Bierner, Jessica Anne, Monson, Todd C., and Huber, Dale L.. Gram scale synthesis of Fe/FexOy core–shell nanoparticles and their incorporation into matrix-free superparamagnetic nanocomposites. United States: N. p., Web. doi:10.1557/jmr.2018.139.
Watt, John Daniel, Bleier, Grant C., Romero, Zachary William, Hance, Bradley G., Bierner, Jessica Anne, Monson, Todd C., & Huber, Dale L.. Gram scale synthesis of Fe/FexOy core–shell nanoparticles and their incorporation into matrix-free superparamagnetic nanocomposites. United States. doi:10.1557/jmr.2018.139.
Watt, John Daniel, Bleier, Grant C., Romero, Zachary William, Hance, Bradley G., Bierner, Jessica Anne, Monson, Todd C., and Huber, Dale L.. 2018. "Gram scale synthesis of Fe/FexOy core–shell nanoparticles and their incorporation into matrix-free superparamagnetic nanocomposites". United States. doi:10.1557/jmr.2018.139.
@article{osti_1444097,
title = {Gram scale synthesis of Fe/FexOy core–shell nanoparticles and their incorporation into matrix-free superparamagnetic nanocomposites},
author = {Watt, John Daniel and Bleier, Grant C. and Romero, Zachary William and Hance, Bradley G. and Bierner, Jessica Anne and Monson, Todd C. and Huber, Dale L.},
abstractNote = {In this paper, significant reductions recently seen in the size of wide-bandgap power electronics have not been accompanied by a relative decrease in the size of the corresponding magnetic components. To achieve this, a new generation of materials with high magnetic saturation and permeability are needed. Here, we develop gram-scale syntheses of superparamagnetic Fe/FexOy core–shell nanoparticles and incorporate them as the magnetic component in a strongly magnetic nanocomposite. Nanocomposites are typically formed by the organization of nanoparticles within a polymeric matrix. However, this approach can lead to high organic fractions and phase separation; reducing the performance of the resulting material. Here, we form aminated nanoparticles that are then cross-linked using epoxy chemistry. The result is a magnetic nanoparticle component that is covalently linked and well separated. By using this ‘matrix-free’ approach, we can substantially increase the magnetic nanoparticle fraction, while still maintaining good separation, leading to a superparamagnetic nanocomposite with strong magnetic properties.},
doi = {10.1557/jmr.2018.139},
journal = {Journal of Materials Research},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {5}
}

Works referenced in this record:

3D-Printing of Lightweight Cellular Composites
journal, June 2014
  • Compton, Brett G.; Lewis, Jennifer A.
  • Advanced Materials, Vol. 26, Issue 34, p. 5930-5935
  • DOI: 10.1002/adma.201401804