Magnetic ordering of ferric oxide within SiO2-based mesoporous materials

Haiquan Guo; Xiaoming Zhang; Min Hui Cui; Renu Sharma; Nan Loh Yang; Daniel L. Akins

doi:10.1016/j.materresbull.2005.05.028

Magnetic ordering of ferric oxide within SiO₂-based mesoporous materials

Haiquan Guo, Xiaoming Zhang, Min Hui Cui, Renu Sharma, Nan Loh Yang, Daniel L. Akins

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Nanostructural ferric oxide was encapsulated within one-dimensional (1-D) silicate mesoporous molecular materials, resulting in the formation of nanocomposites. The resulting nanocomposites were characterized by UV-vis, IR, TEM, EPR and X-ray diffraction. The occluded Fe₂O₃ nanostructures were found to evince optical spectra and magnetic properties that were significantly different from that of bulk Fe₂O₃. EPR measurements indicate that the various nanocomposites (whose dimensions were controllable by the pore sizes of the silicate materials), when sufficiently loaded with small Fe₂O₃ nanoparticles, possess nonzero absorptions at zero applied magnetic field, as well as significant microwave absorption capacities as a function of applied magnetic field strength.

Original language	English (US)
Pages (from-to)	1713-1725
Number of pages	13
Journal	Materials Research Bulletin
Volume	40
Issue number	10
DOIs	https://doi.org/10.1016/j.materresbull.2005.05.028
State	Published - Oct 6 2005
Externally published	Yes

Keywords

A. Composites
A. Nanostructures
C. Electron microscopy
D. Electronic paramagnetic resonance (EPR)
D. Magnetic properties

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.materresbull.2005.05.028

Cite this

@article{79ca6c805d0b4544b849e11a1b6288c3,

title = "Magnetic ordering of ferric oxide within SiO2-based mesoporous materials",

abstract = "Nanostructural ferric oxide was encapsulated within one-dimensional (1-D) silicate mesoporous molecular materials, resulting in the formation of nanocomposites. The resulting nanocomposites were characterized by UV-vis, IR, TEM, EPR and X-ray diffraction. The occluded Fe2O3 nanostructures were found to evince optical spectra and magnetic properties that were significantly different from that of bulk Fe2O3. EPR measurements indicate that the various nanocomposites (whose dimensions were controllable by the pore sizes of the silicate materials), when sufficiently loaded with small Fe2O3 nanoparticles, possess nonzero absorptions at zero applied magnetic field, as well as significant microwave absorption capacities as a function of applied magnetic field strength.",

keywords = "A. Composites, A. Nanostructures, C. Electron microscopy, D. Electronic paramagnetic resonance (EPR), D. Magnetic properties",

author = "Haiquan Guo and Xiaoming Zhang and Cui, {Min Hui} and Renu Sharma and Yang, {Nan Loh} and Akins, {Daniel L.}",

note = "Funding Information: DLA thanks the NSF and DoD-ARO for support of this work, in part, through the following awards: (1) NSF-IGERT program under grant DGE-9972892, (2) NSF-MRSEC program under grant DMR-0213574, and (3) DoD-ARO under Cooperative Agreement DAAD19-01-1-0759.",

year = "2005",

month = oct,

day = "6",

doi = "10.1016/j.materresbull.2005.05.028",

language = "English (US)",

volume = "40",

pages = "1713--1725",

journal = "Materials Research Bulletin",

issn = "0025-5408",

publisher = "Elsevier Limited",

number = "10",

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TY - JOUR

T1 - Magnetic ordering of ferric oxide within SiO2-based mesoporous materials

AU - Guo, Haiquan

AU - Zhang, Xiaoming

AU - Cui, Min Hui

AU - Sharma, Renu

AU - Yang, Nan Loh

AU - Akins, Daniel L.

N1 - Funding Information: DLA thanks the NSF and DoD-ARO for support of this work, in part, through the following awards: (1) NSF-IGERT program under grant DGE-9972892, (2) NSF-MRSEC program under grant DMR-0213574, and (3) DoD-ARO under Cooperative Agreement DAAD19-01-1-0759.

PY - 2005/10/6

Y1 - 2005/10/6

N2 - Nanostructural ferric oxide was encapsulated within one-dimensional (1-D) silicate mesoporous molecular materials, resulting in the formation of nanocomposites. The resulting nanocomposites were characterized by UV-vis, IR, TEM, EPR and X-ray diffraction. The occluded Fe2O3 nanostructures were found to evince optical spectra and magnetic properties that were significantly different from that of bulk Fe2O3. EPR measurements indicate that the various nanocomposites (whose dimensions were controllable by the pore sizes of the silicate materials), when sufficiently loaded with small Fe2O3 nanoparticles, possess nonzero absorptions at zero applied magnetic field, as well as significant microwave absorption capacities as a function of applied magnetic field strength.

AB - Nanostructural ferric oxide was encapsulated within one-dimensional (1-D) silicate mesoporous molecular materials, resulting in the formation of nanocomposites. The resulting nanocomposites were characterized by UV-vis, IR, TEM, EPR and X-ray diffraction. The occluded Fe2O3 nanostructures were found to evince optical spectra and magnetic properties that were significantly different from that of bulk Fe2O3. EPR measurements indicate that the various nanocomposites (whose dimensions were controllable by the pore sizes of the silicate materials), when sufficiently loaded with small Fe2O3 nanoparticles, possess nonzero absorptions at zero applied magnetic field, as well as significant microwave absorption capacities as a function of applied magnetic field strength.

KW - A. Composites

KW - A. Nanostructures

KW - C. Electron microscopy

KW - D. Electronic paramagnetic resonance (EPR)

KW - D. Magnetic properties

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U2 - 10.1016/j.materresbull.2005.05.028

DO - 10.1016/j.materresbull.2005.05.028

M3 - Article

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EP - 1725

JO - Materials Research Bulletin

JF - Materials Research Bulletin

IS - 10

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