Synthesis and magnetic properties of multifunctional CoPtAu nanoparticles

Ji Hyun Min; Jun Hua Wu; Ah Young Song; In Tak Jeon; Jae Seon Ju; Young Keun Kim

doi:10.1063/1.3072750

Synthesis and magnetic properties of multifunctional CoPtAu nanoparticles

Ji Hyun Min, Jun Hua Wu, Ah Young Song, In Tak Jeon, Jae Seon Ju, Young Keun Kim

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Abstract

We present the synthesis and magnetic properties of multifunctional CoPtAu alloy nanoparticles of three compositions, Co0.33 Pt0.33 Au0.33, Co0.2 Pt0.2 Au0.6, and Co0.4 Pt0.4 Au0.2, by a modified polyol process. The x-ray diffraction and transmission electron microscopy analyses confirm the formation of the alloy nanostructure comprising Au-rich and Pt-rich nanophases, with a narrow distribution of particle sizes and provides the detailed structural arrangements. The magnetic study shows the composition dependence of the magnetic properties of the nanoparticles, from superparamagnetic for both Co0.33 Pt0.33 Au0.33 and Co0.4 Pt0.4 Au0.2 to soft ferromagnetic for Co0.2 Pt0.2 Au0.6.

Original language	English
Article number	07B527
Journal	Journal of Applied Physics
Volume	105
Issue number	7
DOIs	https://doi.org/10.1063/1.3072750
Publication status	Published - 2009

Bibliographical note

Funding Information:
This work was supported by the Korea Science and Engineering Foundation through the Pioneer Research Center Program (M10711160001-08M1116-00110), the Korea Research Foundation Grant (KRF-2004-005-D00057), and the Seoul R&BD Program (No. 10920). FIG. 1. XRD patterns of the CoPtAu nanoparticles with three compositions of (a) Co 0.33 Pt 0.33 Au 0.33 , (b) Co 0.2 Pt 0.2 Au 0.6 , and (c) Co 0.4 Pt 0.4 Au 0.2 , respectively. The curves are shifted for clarity and the line indicates the position of the (111) peak. FIG. 2. Deconvolution analysis of the (111) peak in the Co 0.33 Pt 0.33 Au 0.33 nanoparticles. The circles for the experimental data points, thin curves (red online) for the deconvoluted components and thick curve (black online) for their sum. FIG. 3. TEM analysis of the nanoparticles of the three nominal compositions: Morphology for Co 0.33 Pt 0.33 Au 0.33 (a), Co 0.4 Pt 0.4 Au 0.2 (b), and Co 0.2 Pt 0.2 Au 0.6 (c), and lattice image for Co 0.33 Pt 0.33 Au 0.33 (d), Co 0.4 Pt 0.4 Au 0.2 (e), and Co 0.2 Pt 0.2 Au 0.6 (f). FIG. 4. M - H hysteresis curves of the CoPtAu nanoparticles with three compositions of (a) Co 0.33 Pt 0.33 Au 0.33 , (b) Co 0.2 Pt 0.2 Au 0.6 , and (c) Co 0.4 Pt 0.4 Au 0.2 , respectively.

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.3072750

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@article{b63e6918361448a8a93f5d007dcba89a,

title = "Synthesis and magnetic properties of multifunctional CoPtAu nanoparticles",

abstract = "We present the synthesis and magnetic properties of multifunctional CoPtAu alloy nanoparticles of three compositions, Co0.33 Pt0.33 Au0.33, Co0.2 Pt0.2 Au0.6, and Co0.4 Pt0.4 Au0.2, by a modified polyol process. The x-ray diffraction and transmission electron microscopy analyses confirm the formation of the alloy nanostructure comprising Au-rich and Pt-rich nanophases, with a narrow distribution of particle sizes and provides the detailed structural arrangements. The magnetic study shows the composition dependence of the magnetic properties of the nanoparticles, from superparamagnetic for both Co0.33 Pt0.33 Au0.33 and Co0.4 Pt0.4 Au0.2 to soft ferromagnetic for Co0.2 Pt0.2 Au0.6.",

author = "Min, {Ji Hyun} and Wu, {Jun Hua} and Song, {Ah Young} and Jeon, {In Tak} and Ju, {Jae Seon} and Kim, {Young Keun}",

note = "Funding Information: This work was supported by the Korea Science and Engineering Foundation through the Pioneer Research Center Program (M10711160001-08M1116-00110), the Korea Research Foundation Grant (KRF-2004-005-D00057), and the Seoul R&BD Program (No. 10920). FIG. 1. XRD patterns of the CoPtAu nanoparticles with three compositions of (a) Co 0.33 Pt 0.33 Au 0.33 , (b) Co 0.2 Pt 0.2 Au 0.6 , and (c) Co 0.4 Pt 0.4 Au 0.2 , respectively. The curves are shifted for clarity and the line indicates the position of the (111) peak. FIG. 2. Deconvolution analysis of the (111) peak in the Co 0.33 Pt 0.33 Au 0.33 nanoparticles. The circles for the experimental data points, thin curves (red online) for the deconvoluted components and thick curve (black online) for their sum. FIG. 3. TEM analysis of the nanoparticles of the three nominal compositions: Morphology for Co 0.33 Pt 0.33 Au 0.33 (a), Co 0.4 Pt 0.4 Au 0.2 (b), and Co 0.2 Pt 0.2 Au 0.6 (c), and lattice image for Co 0.33 Pt 0.33 Au 0.33 (d), Co 0.4 Pt 0.4 Au 0.2 (e), and Co 0.2 Pt 0.2 Au 0.6 (f). FIG. 4. M - H hysteresis curves of the CoPtAu nanoparticles with three compositions of (a) Co 0.33 Pt 0.33 Au 0.33 , (b) Co 0.2 Pt 0.2 Au 0.6 , and (c) Co 0.4 Pt 0.4 Au 0.2 , respectively. ",

year = "2009",

doi = "10.1063/1.3072750",

language = "English",

volume = "105",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "7",

}

TY - JOUR

T1 - Synthesis and magnetic properties of multifunctional CoPtAu nanoparticles

AU - Min, Ji Hyun

AU - Wu, Jun Hua

AU - Song, Ah Young

AU - Jeon, In Tak

AU - Ju, Jae Seon

AU - Kim, Young Keun

N1 - Funding Information: This work was supported by the Korea Science and Engineering Foundation through the Pioneer Research Center Program (M10711160001-08M1116-00110), the Korea Research Foundation Grant (KRF-2004-005-D00057), and the Seoul R&BD Program (No. 10920). FIG. 1. XRD patterns of the CoPtAu nanoparticles with three compositions of (a) Co 0.33 Pt 0.33 Au 0.33 , (b) Co 0.2 Pt 0.2 Au 0.6 , and (c) Co 0.4 Pt 0.4 Au 0.2 , respectively. The curves are shifted for clarity and the line indicates the position of the (111) peak. FIG. 2. Deconvolution analysis of the (111) peak in the Co 0.33 Pt 0.33 Au 0.33 nanoparticles. The circles for the experimental data points, thin curves (red online) for the deconvoluted components and thick curve (black online) for their sum. FIG. 3. TEM analysis of the nanoparticles of the three nominal compositions: Morphology for Co 0.33 Pt 0.33 Au 0.33 (a), Co 0.4 Pt 0.4 Au 0.2 (b), and Co 0.2 Pt 0.2 Au 0.6 (c), and lattice image for Co 0.33 Pt 0.33 Au 0.33 (d), Co 0.4 Pt 0.4 Au 0.2 (e), and Co 0.2 Pt 0.2 Au 0.6 (f). FIG. 4. M - H hysteresis curves of the CoPtAu nanoparticles with three compositions of (a) Co 0.33 Pt 0.33 Au 0.33 , (b) Co 0.2 Pt 0.2 Au 0.6 , and (c) Co 0.4 Pt 0.4 Au 0.2 , respectively.

PY - 2009

Y1 - 2009

N2 - We present the synthesis and magnetic properties of multifunctional CoPtAu alloy nanoparticles of three compositions, Co0.33 Pt0.33 Au0.33, Co0.2 Pt0.2 Au0.6, and Co0.4 Pt0.4 Au0.2, by a modified polyol process. The x-ray diffraction and transmission electron microscopy analyses confirm the formation of the alloy nanostructure comprising Au-rich and Pt-rich nanophases, with a narrow distribution of particle sizes and provides the detailed structural arrangements. The magnetic study shows the composition dependence of the magnetic properties of the nanoparticles, from superparamagnetic for both Co0.33 Pt0.33 Au0.33 and Co0.4 Pt0.4 Au0.2 to soft ferromagnetic for Co0.2 Pt0.2 Au0.6.

AB - We present the synthesis and magnetic properties of multifunctional CoPtAu alloy nanoparticles of three compositions, Co0.33 Pt0.33 Au0.33, Co0.2 Pt0.2 Au0.6, and Co0.4 Pt0.4 Au0.2, by a modified polyol process. The x-ray diffraction and transmission electron microscopy analyses confirm the formation of the alloy nanostructure comprising Au-rich and Pt-rich nanophases, with a narrow distribution of particle sizes and provides the detailed structural arrangements. The magnetic study shows the composition dependence of the magnetic properties of the nanoparticles, from superparamagnetic for both Co0.33 Pt0.33 Au0.33 and Co0.4 Pt0.4 Au0.2 to soft ferromagnetic for Co0.2 Pt0.2 Au0.6.

UR - http://www.scopus.com/inward/record.url?scp=65249150644&partnerID=8YFLogxK

U2 - 10.1063/1.3072750

DO - 10.1063/1.3072750

M3 - Article

AN - SCOPUS:65249150644

SN - 0021-8979

VL - 105

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 7

M1 - 07B527

ER -

Synthesis and magnetic properties of multifunctional CoPtAu nanoparticles

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