Structure and composition of Au/Co magneto-plasmonic nanoparticles

Bhattarai, Nabraj y Casillas, Gilberto y Khanal, Subarna y Bahena, Daniel y Velázquez Salazar, J. Jesús y Mejía Rosales, Sergio y Ponce, Arturo y Dravid, Vinayak y Whetten, Robert L. y Mariscal, Marcelo M. y Yacamán, Miguel José (2013) Structure and composition of Au/Co magneto-plasmonic nanoparticles. MRS Communications, 3 (3). pp. 177-183. ISSN 2159-6859

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Resumen

The fabrication of bimetallic magnetic nanoparticles (NPs) smaller than the size of single magnetic domain is very challenging because of the agglomeration, non-uniform size, and possible complex chemistry at nanoscale. In this paper, we present an alloyed ferromagnetic 4 ± 1 nm thiolated Au/Co magnetic NPs with decahedral and icosahedral shape. The NPs were characterized by Cs-corrected scanning transmission electron microscopy (STEM) and weretheoretically studied by Grand Canonical Monte Carlo simulations. Comparison of Z-contrast imaging and energy dispersive x-ray spectroscopy used jointly with STEM simulated images from theoretical models uniquely showed an inhomo- geneous alloying with minor segregation. The magnetic measurements obtained from superconducting quantum interference device magnet- ometer exhibited ferromagnetic behavior. This magnetic nanoalloy in the range of single domain is fully magnetized and carries significance as a promising candidate for magnetic data recording, permanent magnetization, and biomedical applications.

Tipo de elemento: Article
Materias: Q Ciencia > Q Ciencias en General
Q Ciencia > QC Física
Divisiones: Ciencias Físico Matemáticas
Usuario depositante: Dr. Sergio J. Mejia Rosales
Creadores:
CreadorEmailORCID
Bhattarai, NabrajNO ESPECIFICADONO ESPECIFICADO
Casillas, GilbertoNO ESPECIFICADONO ESPECIFICADO
Khanal, SubarnaNO ESPECIFICADONO ESPECIFICADO
Bahena, DanielNO ESPECIFICADONO ESPECIFICADO
Velázquez Salazar, J. JesúsNO ESPECIFICADONO ESPECIFICADO
Mejía Rosales, SergioNO ESPECIFICADONO ESPECIFICADO
Ponce, ArturoNO ESPECIFICADONO ESPECIFICADO
Dravid, VinayakNO ESPECIFICADONO ESPECIFICADO
Whetten, Robert L.NO ESPECIFICADONO ESPECIFICADO
Mariscal, Marcelo M.NO ESPECIFICADONO ESPECIFICADO
Yacamán, Miguel JoséNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 03 Feb 2016 21:28
Última modificación: 22 Feb 2016 22:14
URI: http://eprints.uanl.mx/id/eprint/8912

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