Relating Magnetic Properties and High Hyperthermia Performance of Iron Oxide Nanoflowers

We investigated, in depth, the interrelations among structure, magnetic properties, relaxation dynamics and magnetic hyperthermia performance of magnetic nanoflowers. The nanoflowers are about 39 nm in size, and consist of densely packed iron oxide cores. They display a remanent magnetization, which...

Descripción completa

Detalles Bibliográficos
Autores: Bender, Philipp Florian, Fock, Jeppe, frandsen, Catherine, Hansen, Mikkel F., Balceris, Christoph, Ludwig, Frank, Posth, Oliver, Wetterskog, Erik, Bogart, Lara K., Southern, Paul, Szczerba, Wojciech, Zeng, Lunjie, Witte, Kerstin, Grüttner, Cordula, Westphal, Fritz, Honecker, Dirk, González Alonso, David|||0000-0002-2871-6479, Fernández Barquín, Luis|||0000-0003-4722-3722, Johansson, Christer
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/24793
Acceso en línea:http://hdl.handle.net/10902/24793
Access Level:acceso abierto
id ES_65bf0b8894fc4e6918a5e40efb2189f5
oai_identifier_str oai:repositorio.unican.es:10902/24793
network_acronym_str ES
network_name_str España
repository_id_str
spelling Relating Magnetic Properties and High Hyperthermia Performance of Iron Oxide NanoflowersBender, Philipp FlorianFock, Jeppefrandsen, CatherineHansen, Mikkel F.Balceris, ChristophLudwig, FrankPosth, OliverWetterskog, ErikBogart, Lara K.Southern, PaulSzczerba, WojciechZeng, LunjieWitte, KerstinGrüttner, CordulaWestphal, FritzHonecker, DirkGonzález Alonso, David|||0000-0002-2871-6479Fernández Barquín, Luis|||0000-0003-4722-3722Johansson, ChristerWe investigated, in depth, the interrelations among structure, magnetic properties, relaxation dynamics and magnetic hyperthermia performance of magnetic nanoflowers. The nanoflowers are about 39 nm in size, and consist of densely packed iron oxide cores. They display a remanent magnetization, which we explain by the exchange coupling between the cores, but we observe indications for internal spin disorder. By polarized small-angle neutron scattering, we unambiguously confirm that, on average, the nanoflowers are preferentially magnetized along one direction. The extracted discrete relaxation time distribution of the colloidally dispersed particles indicates the presence of three distinct relaxation contributions. We can explain the two slower processes by Brownian and classical Néel relaxation, respectively. The additionally observed very fast relaxation contributions are attributed by us to the relaxation of disordered spins within the nanoflowers. Finally, we show that the intrinsic loss power (ILP, magnetic hyperthermia performance) of the nanoflowers measured in colloidal dispersion at high frequency is comparatively large and independent of the viscosity of the surrounding medium. This concurs with our assumption that the observed relaxation in the high frequency range is primarily a result of internal spin relaxation, and possibly connected to the disordered spins within the individual nanoflowers.The authors thank the Institute Laue-Langevin for provision of neutron beamtime at instrument D33. This project has received funding from the European Commission Framework Programme 7 under Grant Agreement No. 604448 (NanoMag).American Chemical SocietyUniversidad de Cantabria20182018-01-01journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttp://hdl.handle.net/10902/24793J. Phys. Chem. C 2018, 122, 5, 3068-3077reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)InglésengEuropean Commission http://dx.doi.org/10.13039/501100000780 Framework Programme Seven 604448open accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/247932026-06-02T12:39:31Z
dc.title.none.fl_str_mv Relating Magnetic Properties and High Hyperthermia Performance of Iron Oxide Nanoflowers
title Relating Magnetic Properties and High Hyperthermia Performance of Iron Oxide Nanoflowers
spellingShingle Relating Magnetic Properties and High Hyperthermia Performance of Iron Oxide Nanoflowers
Bender, Philipp Florian
title_short Relating Magnetic Properties and High Hyperthermia Performance of Iron Oxide Nanoflowers
title_full Relating Magnetic Properties and High Hyperthermia Performance of Iron Oxide Nanoflowers
title_fullStr Relating Magnetic Properties and High Hyperthermia Performance of Iron Oxide Nanoflowers
title_full_unstemmed Relating Magnetic Properties and High Hyperthermia Performance of Iron Oxide Nanoflowers
title_sort Relating Magnetic Properties and High Hyperthermia Performance of Iron Oxide Nanoflowers
dc.creator.none.fl_str_mv Bender, Philipp Florian
Fock, Jeppe
frandsen, Catherine
Hansen, Mikkel F.
Balceris, Christoph
Ludwig, Frank
Posth, Oliver
Wetterskog, Erik
Bogart, Lara K.
Southern, Paul
Szczerba, Wojciech
Zeng, Lunjie
Witte, Kerstin
Grüttner, Cordula
Westphal, Fritz
Honecker, Dirk
González Alonso, David|||0000-0002-2871-6479
Fernández Barquín, Luis|||0000-0003-4722-3722
Johansson, Christer
author Bender, Philipp Florian
author_facet Bender, Philipp Florian
Fock, Jeppe
frandsen, Catherine
Hansen, Mikkel F.
Balceris, Christoph
Ludwig, Frank
Posth, Oliver
Wetterskog, Erik
Bogart, Lara K.
Southern, Paul
Szczerba, Wojciech
Zeng, Lunjie
Witte, Kerstin
Grüttner, Cordula
Westphal, Fritz
Honecker, Dirk
González Alonso, David|||0000-0002-2871-6479
Fernández Barquín, Luis|||0000-0003-4722-3722
Johansson, Christer
author_role author
author2 Fock, Jeppe
frandsen, Catherine
Hansen, Mikkel F.
Balceris, Christoph
Ludwig, Frank
Posth, Oliver
Wetterskog, Erik
Bogart, Lara K.
Southern, Paul
Szczerba, Wojciech
Zeng, Lunjie
Witte, Kerstin
Grüttner, Cordula
Westphal, Fritz
Honecker, Dirk
González Alonso, David|||0000-0002-2871-6479
Fernández Barquín, Luis|||0000-0003-4722-3722
Johansson, Christer
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
description We investigated, in depth, the interrelations among structure, magnetic properties, relaxation dynamics and magnetic hyperthermia performance of magnetic nanoflowers. The nanoflowers are about 39 nm in size, and consist of densely packed iron oxide cores. They display a remanent magnetization, which we explain by the exchange coupling between the cores, but we observe indications for internal spin disorder. By polarized small-angle neutron scattering, we unambiguously confirm that, on average, the nanoflowers are preferentially magnetized along one direction. The extracted discrete relaxation time distribution of the colloidally dispersed particles indicates the presence of three distinct relaxation contributions. We can explain the two slower processes by Brownian and classical Néel relaxation, respectively. The additionally observed very fast relaxation contributions are attributed by us to the relaxation of disordered spins within the nanoflowers. Finally, we show that the intrinsic loss power (ILP, magnetic hyperthermia performance) of the nanoflowers measured in colloidal dispersion at high frequency is comparatively large and independent of the viscosity of the surrounding medium. This concurs with our assumption that the observed relaxation in the high frequency range is primarily a result of internal spin relaxation, and possibly connected to the disordered spins within the individual nanoflowers.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10902/24793
url http://hdl.handle.net/10902/24793
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission http://dx.doi.org/10.13039/501100000780 Framework Programme Seven 604448
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv J. Phys. Chem. C 2018, 122, 5, 3068-3077
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869409765520572416
score 15.300719

Similares en LA Referencia