Synthesis and structural characterization of ferromagnetic Au/Co nanoparticles

Nabraj Bhattarai; Subarna Khanal; Daniel Bahena; Robert L. Whetten; Miguel Jose-Yacaman

doi:10.1557/opl.2014.526

Synthesis and structural characterization of ferromagnetic Au/Co nanoparticles

Nabraj Bhattarai, Subarna Khanal, Daniel Bahena, Robert L. Whetten, Miguel Jose-Yacaman

Research output: Contribution to journal › Conference article › peer-review

3 Scopus citations

Abstract

The synthesis of bimetallic magnetic nanoparticles is very challenging because of the agglomeration and non-uniform size. In this paper, we present the synthesis of monodispersed 3-5 nm sized thiolated bimetallic alloyed Au/Co nanoparticles with decahedral and icosahedral shape, their characterization using Cs-corrected scanning transmission electron microscopy (STEM) and magnetic measurements using superconducting quantum interference device (SQUID) magnetometer. The Z-contrast imaging and energy dispersive X-ray spectroscopy (EDS) mapping showed an inhomogeneous alloying with minor segregation between Au and Co at nanoscale and the SQUID measurement exhibited the ferromagnetic behavior.

Original language	English (US)
Journal	Materials Research Society Symposium Proceedings
Volume	1708
DOIs	https://doi.org/10.1557/opl.2014.526
State	Published - 2014
Externally published	Yes
Event	2014 MRS Spring Meeting - San Francisco, United States Duration: Apr 21 2014 → Apr 25 2014

Keywords

ferromagnetic
magnetic properties
scanning transmission electron microscopy (STEM)

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1557/opl.2014.526

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@article{85f8663b2f374aa99e4de77abaae8530,

title = "Synthesis and structural characterization of ferromagnetic Au/Co nanoparticles",

abstract = "The synthesis of bimetallic magnetic nanoparticles is very challenging because of the agglomeration and non-uniform size. In this paper, we present the synthesis of monodispersed 3-5 nm sized thiolated bimetallic alloyed Au/Co nanoparticles with decahedral and icosahedral shape, their characterization using Cs-corrected scanning transmission electron microscopy (STEM) and magnetic measurements using superconducting quantum interference device (SQUID) magnetometer. The Z-contrast imaging and energy dispersive X-ray spectroscopy (EDS) mapping showed an inhomogeneous alloying with minor segregation between Au and Co at nanoscale and the SQUID measurement exhibited the ferromagnetic behavior.",

keywords = "ferromagnetic, magnetic properties, scanning transmission electron microscopy (STEM)",

author = "Nabraj Bhattarai and Subarna Khanal and Daniel Bahena and Whetten, \{Robert L.\} and Miguel Jose-Yacaman",

note = "Publisher Copyright: Copyright {\textcopyright} Materials Research Society 2014.; 2014 MRS Spring Meeting ; Conference date: 21-04-2014 Through 25-04-2014",

year = "2014",

doi = "10.1557/opl.2014.526",

language = "English (US)",

volume = "1708",

journal = "Materials Research Society Symposium Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

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TY - JOUR

T1 - Synthesis and structural characterization of ferromagnetic Au/Co nanoparticles

AU - Bhattarai, Nabraj

AU - Khanal, Subarna

AU - Bahena, Daniel

AU - Whetten, Robert L.

AU - Jose-Yacaman, Miguel

PY - 2014

Y1 - 2014

N2 - The synthesis of bimetallic magnetic nanoparticles is very challenging because of the agglomeration and non-uniform size. In this paper, we present the synthesis of monodispersed 3-5 nm sized thiolated bimetallic alloyed Au/Co nanoparticles with decahedral and icosahedral shape, their characterization using Cs-corrected scanning transmission electron microscopy (STEM) and magnetic measurements using superconducting quantum interference device (SQUID) magnetometer. The Z-contrast imaging and energy dispersive X-ray spectroscopy (EDS) mapping showed an inhomogeneous alloying with minor segregation between Au and Co at nanoscale and the SQUID measurement exhibited the ferromagnetic behavior.

AB - The synthesis of bimetallic magnetic nanoparticles is very challenging because of the agglomeration and non-uniform size. In this paper, we present the synthesis of monodispersed 3-5 nm sized thiolated bimetallic alloyed Au/Co nanoparticles with decahedral and icosahedral shape, their characterization using Cs-corrected scanning transmission electron microscopy (STEM) and magnetic measurements using superconducting quantum interference device (SQUID) magnetometer. The Z-contrast imaging and energy dispersive X-ray spectroscopy (EDS) mapping showed an inhomogeneous alloying with minor segregation between Au and Co at nanoscale and the SQUID measurement exhibited the ferromagnetic behavior.

KW - ferromagnetic

KW - magnetic properties

KW - scanning transmission electron microscopy (STEM)

UR - https://www.scopus.com/pages/publications/84924386612

UR - https://www.scopus.com/inward/citedby.url?scp=84924386612&partnerID=8YFLogxK

U2 - 10.1557/opl.2014.526

DO - 10.1557/opl.2014.526

M3 - Conference article

AN - SCOPUS:84924386612

SN - 0272-9172

VL - 1708

JO - Materials Research Society Symposium Proceedings

JF - Materials Research Society Symposium Proceedings

T2 - 2014 MRS Spring Meeting

Y2 - 21 April 2014 through 25 April 2014

ER -

Synthesis and structural characterization of ferromagnetic Au/Co nanoparticles

Abstract

Keywords

ASJC Scopus subject areas

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