skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Air- and Water-Resistant Noble Metal Coated Ferromagnetic Cobalt Nanorods

Abstract

Cobalt nanorods possess ideal magnetic properties for applications requiring magnetically hard nanoparticles. However, their exploitation is undermined by their sensitivity toward oxygen and water, which deteriorates their magnetic properties. The development of a continuous metal shell inert to oxidation could render them stable, opening perspectives not only for already identified applications but also for uses in which contact with air and/or aqueous media is inevitable. However, the direct growth of a conformal noble metal shell on magnetic metals is a challenge. Here, we show that prior treatment of Co nanorods with a tin coordination compound is the crucial step that enables the subsequent growth of a continuous noble metal shell on their surface, rendering them air- and water-resistant, while conserving the monocrystallity, metallicity and the magnetic properties of the Co core. Thus, the as-synthesized core–shell ferromagnetic nanorods combine high magnetization and strong uniaxial magnetic anisotropy, even after exposure to air and water, and hold promise for successful implementation in in vitro biodiagnostics requiring probes of high magnetization and anisotropic shape.

Authors:
 [1];  [1];  [2];  [3];  [1];  [1];  [1];  [4];  [4];  [5];  [6];  [6];  [1];  [3];  [3];  [7];  [1]
  1. Laboratoire de Physique et Chimie des Nano-objets (LPCNO), Université de Toulouse, INSA, UPS, CNRS, 135 avenue de Rangueil, 31077 Toulouse, France
  2. Laboratoire de Physique et Chimie des Nano-objets (LPCNO), Université de Toulouse, INSA, UPS, CNRS, 135 avenue de Rangueil, 31077 Toulouse, France; Centre d’Elaboration de Matériaux et d’Etudes Structurales (CEMES-CNRS), 29 rue Jeanne Marvig, B.P. 94347, 31055 Toulouse, France
  3. Electron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
  4. Chemical Science and Engineering Division, Argonne National Laboratory, 9700 S Cass Avenue, Argonne, Illinois 60439, United States
  5. IPREM-ECP CNRS UMR 5254, Université de Pau, Hélioparc Pau Pyrénées, 2 av. Pierre Angot, 64053 Pau Cedex 9, France
  6. Molecular Diagnostics, AIT Austrian Institute of Technology, Vienna, Donau City Strasse 1, 1220 Vienna, Austria
  7. Centre d’Elaboration de Matériaux et d’Etudes Structurales (CEMES-CNRS), 29 rue Jeanne Marvig, B.P. 94347, 31055 Toulouse, France
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Institute for Atom-efficient Chemical Transformations (IACT)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1385869
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Nano; Journal Volume: 9; Journal Issue: 3; Related Information: IACT partners with Argonne National Laboratory (lead); Brookhaven National Laboratory; Northwestern University; Purdue University; University of Wisconsin at Madison
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; catalysis (homogeneous), catalysis (heterogeneous), biofuels (including algae and biomass), bio-inspired, materials and chemistry by design, synthesis (novel materials), synthesis (scalable processing)

Citation Formats

Lentijo-Mozo, Sergio, Tan, Reasmey P., Garcia-Marcelot, Cécile, Altantzis, Thomas, Fazzini, Pier-Francesco, Hungria, Teresa, Cormary, Benoit, Gallagher, James R., Miller, Jeffrey T., Martinez, Herve, Schrittwieser, Stefan, Schotter, Joerg, Respaud, Marc, Bals, Sara, Tendeloo, Gustaaf Van, Gatel, Christophe, and Soulantica, Katerina. Air- and Water-Resistant Noble Metal Coated Ferromagnetic Cobalt Nanorods. United States: N. p., 2015. Web. doi:10.1021/nn506709k.
Lentijo-Mozo, Sergio, Tan, Reasmey P., Garcia-Marcelot, Cécile, Altantzis, Thomas, Fazzini, Pier-Francesco, Hungria, Teresa, Cormary, Benoit, Gallagher, James R., Miller, Jeffrey T., Martinez, Herve, Schrittwieser, Stefan, Schotter, Joerg, Respaud, Marc, Bals, Sara, Tendeloo, Gustaaf Van, Gatel, Christophe, & Soulantica, Katerina. Air- and Water-Resistant Noble Metal Coated Ferromagnetic Cobalt Nanorods. United States. doi:10.1021/nn506709k.
Lentijo-Mozo, Sergio, Tan, Reasmey P., Garcia-Marcelot, Cécile, Altantzis, Thomas, Fazzini, Pier-Francesco, Hungria, Teresa, Cormary, Benoit, Gallagher, James R., Miller, Jeffrey T., Martinez, Herve, Schrittwieser, Stefan, Schotter, Joerg, Respaud, Marc, Bals, Sara, Tendeloo, Gustaaf Van, Gatel, Christophe, and Soulantica, Katerina. Wed . "Air- and Water-Resistant Noble Metal Coated Ferromagnetic Cobalt Nanorods". United States. doi:10.1021/nn506709k.
@article{osti_1385869,
title = {Air- and Water-Resistant Noble Metal Coated Ferromagnetic Cobalt Nanorods},
author = {Lentijo-Mozo, Sergio and Tan, Reasmey P. and Garcia-Marcelot, Cécile and Altantzis, Thomas and Fazzini, Pier-Francesco and Hungria, Teresa and Cormary, Benoit and Gallagher, James R. and Miller, Jeffrey T. and Martinez, Herve and Schrittwieser, Stefan and Schotter, Joerg and Respaud, Marc and Bals, Sara and Tendeloo, Gustaaf Van and Gatel, Christophe and Soulantica, Katerina},
abstractNote = {Cobalt nanorods possess ideal magnetic properties for applications requiring magnetically hard nanoparticles. However, their exploitation is undermined by their sensitivity toward oxygen and water, which deteriorates their magnetic properties. The development of a continuous metal shell inert to oxidation could render them stable, opening perspectives not only for already identified applications but also for uses in which contact with air and/or aqueous media is inevitable. However, the direct growth of a conformal noble metal shell on magnetic metals is a challenge. Here, we show that prior treatment of Co nanorods with a tin coordination compound is the crucial step that enables the subsequent growth of a continuous noble metal shell on their surface, rendering them air- and water-resistant, while conserving the monocrystallity, metallicity and the magnetic properties of the Co core. Thus, the as-synthesized core–shell ferromagnetic nanorods combine high magnetization and strong uniaxial magnetic anisotropy, even after exposure to air and water, and hold promise for successful implementation in in vitro biodiagnostics requiring probes of high magnetization and anisotropic shape.},
doi = {10.1021/nn506709k},
journal = {ACS Nano},
number = 3,
volume = 9,
place = {United States},
year = {Wed Feb 25 00:00:00 EST 2015},
month = {Wed Feb 25 00:00:00 EST 2015}
}