Magnetic and elastic properties of CoFe2O4- polydimethylsiloxane magnetically oriented elastomer nanocomposites

Mostrar todas las versiones(3)

Magnetic elastic structured composites were prepared by using CoFe 2O4 ferromagnetic and superparamagnetic nanoparticles as fillers in polydimethylsiloxane (PDMS) matrixes, which were cured in the presence of a uniform magnetic field. Cobalt-iron oxide nanoparticles of three different average sizes...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Soledad Antonel, P., Jorge, G., Perez, O.E., Butera, A., Gabriela Leyva, A., Martín Negri, R.
Formato: Artículo publishedVersion
Publicado: 2011
Materias:
Average size
Blocking temperature
Coercive field
Elastic properties
matrix
Oxide nanoparticles
Polydimethylsiloxane PDMS
Probe field
Relative orientation
Room temperature
SEM image
Superparamagnetic behavior
Superparamagnetic nanoparticles
Young's Modulus
Cobalt
Curing
Elasticity
Ferromagnetic materials
Ferromagnetism
Iron oxides
Magnetic fields
Magnetization
Microchannels
Nanocomposites
Nanoparticles
Needles
Remanence
Silicones
Superparamagnetism
Nanomagnetics
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00218979_v110_n4_p_SoledadAntonel
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00218979_v110_n4_p_SoledadAntonel_oai
Aporte de:
Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_00218979_v110_n4_p_SoledadAntonel_oai
record_format dspace
spelling I28-R145-paper_00218979_v110_n4_p_SoledadAntonel_oai2024-08-16 Soledad Antonel, P. Jorge, G. Perez, O.E. Butera, A. Gabriela Leyva, A. Martín Negri, R. 2011 Magnetic elastic structured composites were prepared by using CoFe 2O4 ferromagnetic and superparamagnetic nanoparticles as fillers in polydimethylsiloxane (PDMS) matrixes, which were cured in the presence of a uniform magnetic field. Cobalt-iron oxide nanoparticles of three different average sizes (between 2 and 12 nm) were synthesized and characterized. The smallest nanoparticles presented superparamagnetic behavior, with a blocking temperature of approximately 75 K, while larger particles are already blocked at room temperature. Macroscopically structured-anisotropic PDMS-CoFe2O4 composites were obtained when curing the dispersion of the nanoparticles in the presence of a uniform magnetic field (0.3 T). The formation of the particle's chains (needles) orientated in the direction of the magnetic field was observed only when loading with the larger magnetically blocked nanoparticles. The SEM images show that the needles are formed by groups of nanoparticles which retain their original average size. The Young's moduli of the structured composites are four times larger when measured along the oriented needles than in the perpendicular direction. Magnetization (VSM) and ferromagnetic resonance curves of the structured composites were determined as a function of the relative orientation between the needles and the probe field. The remanence magnetization was 30 higher when measured parallel to the needles, while the coercive field remains isotropic. These observations are discussed in terms of the individual nanoparticle's properties and its aggregation in the composites. © 2011 American Institute of Physics. Fil:Soledad Antonel, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Jorge, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Perez, O.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Martín Negri, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_00218979_v110_n4_p_SoledadAntonel info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar J Appl Phys 2011;110(4) Average size Blocking temperature Coercive field Elastic properties matrix Oxide nanoparticles Polydimethylsiloxane PDMS Probe field Relative orientation Room temperature SEM image Superparamagnetic behavior Superparamagnetic nanoparticles Young's Modulus Cobalt Curing Elasticity Ferromagnetic materials Ferromagnetism Iron oxides Magnetic fields Magnetization Microchannels Nanocomposites Nanoparticles Needles Remanence Silicones Superparamagnetism Nanomagnetics Magnetic and elastic properties of CoFe2O4- polydimethylsiloxane magnetically oriented elastomer nanocomposites info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00218979_v110_n4_p_SoledadAntonel_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic Average size
Blocking temperature
Coercive field
Elastic properties
matrix
Oxide nanoparticles
Polydimethylsiloxane PDMS
Probe field
Relative orientation
Room temperature
SEM image
Superparamagnetic behavior
Superparamagnetic nanoparticles
Young's Modulus
Cobalt
Curing
Elasticity
Ferromagnetic materials
Ferromagnetism
Iron oxides
Magnetic fields
Magnetization
Microchannels
Nanocomposites
Nanoparticles
Needles
Remanence
Silicones
Superparamagnetism
Nanomagnetics
spellingShingle Average size
Blocking temperature
Coercive field
Elastic properties
matrix
Oxide nanoparticles
Polydimethylsiloxane PDMS
Probe field
Relative orientation
Room temperature
SEM image
Superparamagnetic behavior
Superparamagnetic nanoparticles
Young's Modulus
Cobalt
Curing
Elasticity
Ferromagnetic materials
Ferromagnetism
Iron oxides
Magnetic fields
Magnetization
Microchannels
Nanocomposites
Nanoparticles
Needles
Remanence
Silicones
Superparamagnetism
Nanomagnetics
Soledad Antonel, P.
Jorge, G.
Perez, O.E.
Butera, A.
Gabriela Leyva, A.
Martín Negri, R.
Magnetic and elastic properties of CoFe2O4- polydimethylsiloxane magnetically oriented elastomer nanocomposites
topic_facet Average size
Blocking temperature
Coercive field
Elastic properties
matrix
Oxide nanoparticles
Polydimethylsiloxane PDMS
Probe field
Relative orientation
Room temperature
SEM image
Superparamagnetic behavior
Superparamagnetic nanoparticles
Young's Modulus
Cobalt
Curing
Elasticity
Ferromagnetic materials
Ferromagnetism
Iron oxides
Magnetic fields
Magnetization
Microchannels
Nanocomposites
Nanoparticles
Needles
Remanence
Silicones
Superparamagnetism
Nanomagnetics
description Magnetic elastic structured composites were prepared by using CoFe 2O4 ferromagnetic and superparamagnetic nanoparticles as fillers in polydimethylsiloxane (PDMS) matrixes, which were cured in the presence of a uniform magnetic field. Cobalt-iron oxide nanoparticles of three different average sizes (between 2 and 12 nm) were synthesized and characterized. The smallest nanoparticles presented superparamagnetic behavior, with a blocking temperature of approximately 75 K, while larger particles are already blocked at room temperature. Macroscopically structured-anisotropic PDMS-CoFe2O4 composites were obtained when curing the dispersion of the nanoparticles in the presence of a uniform magnetic field (0.3 T). The formation of the particle's chains (needles) orientated in the direction of the magnetic field was observed only when loading with the larger magnetically blocked nanoparticles. The SEM images show that the needles are formed by groups of nanoparticles which retain their original average size. The Young's moduli of the structured composites are four times larger when measured along the oriented needles than in the perpendicular direction. Magnetization (VSM) and ferromagnetic resonance curves of the structured composites were determined as a function of the relative orientation between the needles and the probe field. The remanence magnetization was 30 higher when measured parallel to the needles, while the coercive field remains isotropic. These observations are discussed in terms of the individual nanoparticle's properties and its aggregation in the composites. © 2011 American Institute of Physics.
format Artículo
Artículo
publishedVersion
author Soledad Antonel, P.
Jorge, G.
Perez, O.E.
Butera, A.
Gabriela Leyva, A.
Martín Negri, R.
author_facet Soledad Antonel, P.
Jorge, G.
Perez, O.E.
Butera, A.
Gabriela Leyva, A.
Martín Negri, R.
author_sort Soledad Antonel, P.
title Magnetic and elastic properties of CoFe2O4- polydimethylsiloxane magnetically oriented elastomer nanocomposites
title_short Magnetic and elastic properties of CoFe2O4- polydimethylsiloxane magnetically oriented elastomer nanocomposites
title_full Magnetic and elastic properties of CoFe2O4- polydimethylsiloxane magnetically oriented elastomer nanocomposites
title_fullStr Magnetic and elastic properties of CoFe2O4- polydimethylsiloxane magnetically oriented elastomer nanocomposites
title_full_unstemmed Magnetic and elastic properties of CoFe2O4- polydimethylsiloxane magnetically oriented elastomer nanocomposites
title_sort magnetic and elastic properties of cofe2o4- polydimethylsiloxane magnetically oriented elastomer nanocomposites
publishDate 2011
url http://hdl.handle.net/20.500.12110/paper_00218979_v110_n4_p_SoledadAntonel
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00218979_v110_n4_p_SoledadAntonel_oai
work_keys_str_mv AT soledadantonelp magneticandelasticpropertiesofcofe2o4polydimethylsiloxanemagneticallyorientedelastomernanocomposites
AT jorgeg magneticandelasticpropertiesofcofe2o4polydimethylsiloxanemagneticallyorientedelastomernanocomposites
AT perezoe magneticandelasticpropertiesofcofe2o4polydimethylsiloxanemagneticallyorientedelastomernanocomposites
AT buteraa magneticandelasticpropertiesofcofe2o4polydimethylsiloxanemagneticallyorientedelastomernanocomposites
AT gabrielaleyvaa magneticandelasticpropertiesofcofe2o4polydimethylsiloxanemagneticallyorientedelastomernanocomposites
AT martinnegrir magneticandelasticpropertiesofcofe2o4polydimethylsiloxanemagneticallyorientedelastomernanocomposites
_version_ 1809356965127651328

Ejemplares similares