TEM characterization of chemically synthesized copper-gold nanoparticles

DT Tran; Ian Jones; Jon Preece; Roy Johnston; CR van den Brom

doi:10.1007/s11051-011-0367-2

TEM characterization of chemically synthesized copper-gold nanoparticles

DT Tran, Ian Jones, Jon Preece, Roy Johnston, CR van den Brom

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Abstract

Dodecanethiol-capped Cu-Au nanoparticles, synthesized via a successive two-phase (water/toluene) and galvanic-exchange procedure, were characterized using transmission electron microscopy (TEM). The size range of the particles is around 1-7 nm. Electron-induced morphological evolution was observed under high resolution (HR) TEM. Cuboctahedral morphology was found to be thermodynamically stable. Electron-induced aggregation of two particles was also observed. Chemical ordering of cuboctahedral particles was studied by atomic-resolution high angle annular dark field (HAADF) imaging in scanning TEM (STEM) mode and energy dispersive X-ray (EDX) element mapping using a silicon drift detector (SDD). The particles were found to be Cu-Au mixed, and to be stable in air. Surface plasmon resonance (SPR), which is dependent on local structure and morphology, was investigated by electron energy loss spectroscopy (EELS).

Original language	English
Pages (from-to)	4229-4237
Number of pages	9
Journal	Journal of Nanoparticle Research
Volume	13
Issue number	9
DOIs	https://doi.org/10.1007/s11051-011-0367-2
Publication status	Published - 1 Sept 2011

Keywords

TEM
EELS
Copper-gold nanoparticles
EDX
SDD
Catalysts
HAADF-STEM
HRTEM

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10.1007/s11051-011-0367-2

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title = "TEM characterization of chemically synthesized copper-gold nanoparticles",

abstract = "Dodecanethiol-capped Cu-Au nanoparticles, synthesized via a successive two-phase (water/toluene) and galvanic-exchange procedure, were characterized using transmission electron microscopy (TEM). The size range of the particles is around 1-7 nm. Electron-induced morphological evolution was observed under high resolution (HR) TEM. Cuboctahedral morphology was found to be thermodynamically stable. Electron-induced aggregation of two particles was also observed. Chemical ordering of cuboctahedral particles was studied by atomic-resolution high angle annular dark field (HAADF) imaging in scanning TEM (STEM) mode and energy dispersive X-ray (EDX) element mapping using a silicon drift detector (SDD). The particles were found to be Cu-Au mixed, and to be stable in air. Surface plasmon resonance (SPR), which is dependent on local structure and morphology, was investigated by electron energy loss spectroscopy (EELS).",

keywords = "TEM, EELS, Copper-gold nanoparticles, EDX, SDD, Catalysts, HAADF-STEM, HRTEM",

author = "DT Tran and Ian Jones and Jon Preece and Roy Johnston and {van den Brom}, CR",

year = "2011",

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doi = "10.1007/s11051-011-0367-2",

language = "English",

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T1 - TEM characterization of chemically synthesized copper-gold nanoparticles

AU - Tran, DT

AU - Jones, Ian

AU - Preece, Jon

AU - Johnston, Roy

AU - van den Brom, CR

PY - 2011/9/1

Y1 - 2011/9/1

N2 - Dodecanethiol-capped Cu-Au nanoparticles, synthesized via a successive two-phase (water/toluene) and galvanic-exchange procedure, were characterized using transmission electron microscopy (TEM). The size range of the particles is around 1-7 nm. Electron-induced morphological evolution was observed under high resolution (HR) TEM. Cuboctahedral morphology was found to be thermodynamically stable. Electron-induced aggregation of two particles was also observed. Chemical ordering of cuboctahedral particles was studied by atomic-resolution high angle annular dark field (HAADF) imaging in scanning TEM (STEM) mode and energy dispersive X-ray (EDX) element mapping using a silicon drift detector (SDD). The particles were found to be Cu-Au mixed, and to be stable in air. Surface plasmon resonance (SPR), which is dependent on local structure and morphology, was investigated by electron energy loss spectroscopy (EELS).

AB - Dodecanethiol-capped Cu-Au nanoparticles, synthesized via a successive two-phase (water/toluene) and galvanic-exchange procedure, were characterized using transmission electron microscopy (TEM). The size range of the particles is around 1-7 nm. Electron-induced morphological evolution was observed under high resolution (HR) TEM. Cuboctahedral morphology was found to be thermodynamically stable. Electron-induced aggregation of two particles was also observed. Chemical ordering of cuboctahedral particles was studied by atomic-resolution high angle annular dark field (HAADF) imaging in scanning TEM (STEM) mode and energy dispersive X-ray (EDX) element mapping using a silicon drift detector (SDD). The particles were found to be Cu-Au mixed, and to be stable in air. Surface plasmon resonance (SPR), which is dependent on local structure and morphology, was investigated by electron energy loss spectroscopy (EELS).

KW - TEM

KW - EELS

KW - Copper-gold nanoparticles

KW - EDX

KW - SDD

KW - Catalysts

KW - HAADF-STEM

KW - HRTEM

U2 - 10.1007/s11051-011-0367-2

DO - 10.1007/s11051-011-0367-2

M3 - Article

SN - 1572-896X

VL - 13

SP - 4229

EP - 4237

JO - Journal of Nanoparticle Research

JF - Journal of Nanoparticle Research

IS - 9

ER -

TEM characterization of chemically synthesized copper-gold nanoparticles

Abstract

Keywords

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