Synthesis of FePt nanocubes and their oriented self-assembly

Min Chen; Jaemin Kim; J. P. Liu; Hongyou Fan; Shouheng Sun

doi:10.1021/ja061704x

Synthesis of FePt nanocubes and their oriented self-assembly

Min Chen, Jaemin Kim, J. P. Liu, Hongyou Fan, Shouheng Sun

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

Abstract

Monodisperse FePt nanocubes are synthesized at 205 °C by controlling decomposition of Fe(CO)₅ and reduction of Pt(acac)₂ and addition sequence of oleic acid and oleylamine. Different from the assembly of the sphere-like FePt nanoparticles, which shows 3D random structure orientation, self-assembly of the FePt nanocubes leads to a superlattice array with each FePt cube exhibiting (100) texture. Thermal annealing converts the chemically disordered fcc FePt to chemically ordered fct FePt, and the annealed assembly shows a strong (001) texture in the directions both parallel and perpendicular to the substrate. This shape-controlled synthesis and self-assembly offers a promising approach to fabrication of magnetically aligned FePt nanocrystal arrays for high density information storage and high performance permanent magnet applications.

Original language	English (US)
Pages (from-to)	7132-7133
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	128
Issue number	22
DOIs	https://doi.org/10.1021/ja061704x
State	Published - Jun 7 2006
Externally published	Yes

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja061704x

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AU - Fan, Hongyou

AU - Sun, Shouheng

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AB - Monodisperse FePt nanocubes are synthesized at 205 °C by controlling decomposition of Fe(CO)5 and reduction of Pt(acac)2 and addition sequence of oleic acid and oleylamine. Different from the assembly of the sphere-like FePt nanoparticles, which shows 3D random structure orientation, self-assembly of the FePt nanocubes leads to a superlattice array with each FePt cube exhibiting (100) texture. Thermal annealing converts the chemically disordered fcc FePt to chemically ordered fct FePt, and the annealed assembly shows a strong (001) texture in the directions both parallel and perpendicular to the substrate. This shape-controlled synthesis and self-assembly offers a promising approach to fabrication of magnetically aligned FePt nanocrystal arrays for high density information storage and high performance permanent magnet applications.

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Synthesis of FePt nanocubes and their oriented self-assembly

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