Fe(3)O(4) nanoparticles: protein-mediated crystalline magnetic superstructures

Mitsuhiro Okuda; Jean-Charles Eloi; Sarah E Bird; Andrei Sarua; Robert M Richardson; Walther Schwarzacher

doi:10.1088/0957-4484/23/41/415601

Fe(3)O(4) nanoparticles: protein-mediated crystalline magnetic superstructures

Mitsuhiro Okuda
, Jean-Charles Eloi
, Sarah E Bird
, Andrei Sarua
, Robert M Richardson
, Walther Schwarzacher

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

47 Citations (Scopus)

Abstract

The synthesis of magnetic, monodisperse nanoparticles has attracted great interest in nanoelectronics and nanomedicine. Here we report the fabrication of pure magnetite nanoparticles, less than ten nanometers in size, using the cage-shaped protein apoferritin (Fe(3)O(4)-ferritin). Crystallizable proteins were obtained through careful successive separation methods, including a magnetic chromatography that enabled the effective separation of proteins, including a Fe(3)O(4) nanoparticle (7.90.8nm), from empty ones. Macroscopic protein crystals allowed the fabrication of three-dimensional arrays of Fe(3)O(4) nanoparticles with interparticle gaps controlled by dehydration, decreasing their magnetic susceptibilities and increasing their blocking temperatures through enhanced dipole-dipole interactions.

Original language	English
Article number	415601
Number of pages	7
Journal	Nanotechnology
Volume	23
Issue number	41
Early online date	25 Sept 2012
DOIs	https://doi.org/10.1088/0957-4484/23/41/415601
Publication status	Published - 19 Oct 2012

Keywords

Animals
Apoferritins
Crystallization
Horses
Magnetite Nanoparticles
Nanotechnology
Scattering, Small Angle
X-Ray Diffraction

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10.1088/0957-4484/23/41/415601

http://iopscience.iop.org/0957-4484/23/41/415601/

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47 Citations
2 Article (Academic Journal)

Energy barrier distribution for dispersed mixed oxide magnetic nanoparticles
Okuda, M., Eloi, J.-C., Sarua, A., Bird, S. E. & Schwarzacher, W., 1 Apr 2012, In: Journal of Applied Physics. 111, 7, p. 07B519 3 p.
Research output: Contribution to journal › Article (Academic Journal) › peer-review
10 Citations (Scopus)
Bioengineered magnetic crystals
Kasyutich, O. I., Sarua, A. & Schwarzacher, W., Jul 2008, In: Journal of Physics D: Applied Physics. 41, 13, p. 2-5 4 p., 134022.
Research output: Contribution to journal › Article (Academic Journal) › peer-review

41 Citations (Scopus)

1 Finished

PERIODIC 3-D NANOPARTICLE ARRAYS BY PROTEIN CRYSTALLIZATION
Schwarzacher, W. (Principal Investigator)
1/01/09 → 1/07/12
Project: Research

Cite this

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title = "Fe(3)O(4) nanoparticles: protein-mediated crystalline magnetic superstructures",

abstract = "The synthesis of magnetic, monodisperse nanoparticles has attracted great interest in nanoelectronics and nanomedicine. Here we report the fabrication of pure magnetite nanoparticles, less than ten nanometers in size, using the cage-shaped protein apoferritin (Fe(3)O(4)-ferritin). Crystallizable proteins were obtained through careful successive separation methods, including a magnetic chromatography that enabled the effective separation of proteins, including a Fe(3)O(4) nanoparticle (7.90.8nm), from empty ones. Macroscopic protein crystals allowed the fabrication of three-dimensional arrays of Fe(3)O(4) nanoparticles with interparticle gaps controlled by dehydration, decreasing their magnetic susceptibilities and increasing their blocking temperatures through enhanced dipole-dipole interactions. ",

keywords = "Animals, Apoferritins, Crystallization, Horses, Magnetite Nanoparticles, Nanotechnology, Scattering, Small Angle, X-Ray Diffraction",

author = "Mitsuhiro Okuda and Jean-Charles Eloi and Bird, \{Sarah E\} and Andrei Sarua and Richardson, \{Robert M\} and Walther Schwarzacher",

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T2 - protein-mediated crystalline magnetic superstructures

AU - Okuda, Mitsuhiro

AU - Eloi, Jean-Charles

AU - Bird, Sarah E

AU - Sarua, Andrei

AU - Richardson, Robert M

AU - Schwarzacher, Walther

PY - 2012/10/19

Y1 - 2012/10/19

N2 - The synthesis of magnetic, monodisperse nanoparticles has attracted great interest in nanoelectronics and nanomedicine. Here we report the fabrication of pure magnetite nanoparticles, less than ten nanometers in size, using the cage-shaped protein apoferritin (Fe(3)O(4)-ferritin). Crystallizable proteins were obtained through careful successive separation methods, including a magnetic chromatography that enabled the effective separation of proteins, including a Fe(3)O(4) nanoparticle (7.90.8nm), from empty ones. Macroscopic protein crystals allowed the fabrication of three-dimensional arrays of Fe(3)O(4) nanoparticles with interparticle gaps controlled by dehydration, decreasing their magnetic susceptibilities and increasing their blocking temperatures through enhanced dipole-dipole interactions.

AB - The synthesis of magnetic, monodisperse nanoparticles has attracted great interest in nanoelectronics and nanomedicine. Here we report the fabrication of pure magnetite nanoparticles, less than ten nanometers in size, using the cage-shaped protein apoferritin (Fe(3)O(4)-ferritin). Crystallizable proteins were obtained through careful successive separation methods, including a magnetic chromatography that enabled the effective separation of proteins, including a Fe(3)O(4) nanoparticle (7.90.8nm), from empty ones. Macroscopic protein crystals allowed the fabrication of three-dimensional arrays of Fe(3)O(4) nanoparticles with interparticle gaps controlled by dehydration, decreasing their magnetic susceptibilities and increasing their blocking temperatures through enhanced dipole-dipole interactions.

KW - Animals

KW - Apoferritins

KW - Crystallization

KW - Horses

KW - Magnetite Nanoparticles

KW - Nanotechnology

KW - Scattering, Small Angle

KW - X-Ray Diffraction

U2 - 10.1088/0957-4484/23/41/415601

DO - 10.1088/0957-4484/23/41/415601

M3 - Article (Academic Journal)

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VL - 23

JO - Nanotechnology

JF - Nanotechnology

IS - 41

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ER -

Fe(3)O(4) nanoparticles: protein-mediated crystalline magnetic superstructures

Abstract

Keywords

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Research output

Energy barrier distribution for dispersed mixed oxide magnetic nanoparticles

Bioengineered magnetic crystals

Projects

PERIODIC 3-D NANOPARTICLE ARRAYS BY PROTEIN CRYSTALLIZATION

Cite this