The Co-Au interface in bimetallic nanoparticles: A high resolution STEM study

Alvaro Mayoral; Sergio Mejía-Rosales; Marcelo M. Mariscal; Eduardo Pérez-Tijerina; Miguel José-Yacamán

doi:10.1039/c0nr00498g

The Co-Au interface in bimetallic nanoparticles: A high resolution STEM study

Alvaro Mayoral
, Sergio Mejía-Rosales
, Marcelo M. Mariscal
, Eduardo Pérez-Tijerina
, Miguel José-Yacamán

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

46 Scopus citations

Abstract

We report the formation of Au/Co nanoparticles and their characterization by aberration (C_s) corrected scanning transmission electron microscopy (STEM). The nanoparticles were synthesized by inert gas condensation, forming initially core-shell and bimetallic crystals. However, after thermal treatment at normal atmospheric conditions, the Co nanoparticles changed their morphology into a fine layer forming a perfect interface with the gold. The ordering of the zone rich in Co presents a fcc arrangement matching the gold lattice. The atomic analysis on the interface and the comparison of the STEM images with numerical simulations corroborated the atomic substitution of gold by cobalt.

Original language	English (US)
Pages (from-to)	2647-2651
Number of pages	5
Journal	Nanoscale
Volume	2
Issue number	12
DOIs	https://doi.org/10.1039/c0nr00498g
State	Published - Nov 2010
Externally published	Yes

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1039/c0nr00498g

Cite this

@article{7ce28809b5e447109ad393c4e25ed38d,

title = "The Co-Au interface in bimetallic nanoparticles: A high resolution STEM study",

abstract = "We report the formation of Au/Co nanoparticles and their characterization by aberration (Cs) corrected scanning transmission electron microscopy (STEM). The nanoparticles were synthesized by inert gas condensation, forming initially core-shell and bimetallic crystals. However, after thermal treatment at normal atmospheric conditions, the Co nanoparticles changed their morphology into a fine layer forming a perfect interface with the gold. The ordering of the zone rich in Co presents a fcc arrangement matching the gold lattice. The atomic analysis on the interface and the comparison of the STEM images with numerical simulations corroborated the atomic substitution of gold by cobalt.",

author = "Alvaro Mayoral and Sergio Mej{\'i}a-Rosales and Mariscal, \{Marcelo M.\} and Eduardo P{\'e}rez-Tijerina and Miguel Jos{\'e}-Yacam{\'a}n",

year = "2010",

month = nov,

doi = "10.1039/c0nr00498g",

language = "English (US)",

volume = "2",

pages = "2647--2651",

journal = "Nanoscale",

issn = "2040-3364",

publisher = "Royal Society of Chemistry",

number = "12",

}

TY - JOUR

T1 - The Co-Au interface in bimetallic nanoparticles

T2 - A high resolution STEM study

AU - Mayoral, Alvaro

AU - Mejía-Rosales, Sergio

AU - Mariscal, Marcelo M.

AU - Pérez-Tijerina, Eduardo

AU - José-Yacamán, Miguel

PY - 2010/11

Y1 - 2010/11

N2 - We report the formation of Au/Co nanoparticles and their characterization by aberration (Cs) corrected scanning transmission electron microscopy (STEM). The nanoparticles were synthesized by inert gas condensation, forming initially core-shell and bimetallic crystals. However, after thermal treatment at normal atmospheric conditions, the Co nanoparticles changed their morphology into a fine layer forming a perfect interface with the gold. The ordering of the zone rich in Co presents a fcc arrangement matching the gold lattice. The atomic analysis on the interface and the comparison of the STEM images with numerical simulations corroborated the atomic substitution of gold by cobalt.

AB - We report the formation of Au/Co nanoparticles and their characterization by aberration (Cs) corrected scanning transmission electron microscopy (STEM). The nanoparticles were synthesized by inert gas condensation, forming initially core-shell and bimetallic crystals. However, after thermal treatment at normal atmospheric conditions, the Co nanoparticles changed their morphology into a fine layer forming a perfect interface with the gold. The ordering of the zone rich in Co presents a fcc arrangement matching the gold lattice. The atomic analysis on the interface and the comparison of the STEM images with numerical simulations corroborated the atomic substitution of gold by cobalt.

UR - https://www.scopus.com/pages/publications/78649837229

UR - https://www.scopus.com/pages/publications/78649837229#tab=citedBy

U2 - 10.1039/c0nr00498g

DO - 10.1039/c0nr00498g

M3 - Article

C2 - 20944844

AN - SCOPUS:78649837229

SN - 2040-3364

VL - 2

SP - 2647

EP - 2651

JO - Nanoscale

JF - Nanoscale

IS - 12

ER -

The Co-Au interface in bimetallic nanoparticles: A high resolution STEM study

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this