Nuclear Magnetic Resonance in Hexaferrite/Maghemite Composite Nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10316940" target="_blank" >RIV/00216208:11320/15:10316940 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.12693/APhysPolA.127.514" target="_blank" >http://dx.doi.org/10.12693/APhysPolA.127.514</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12693/APhysPolA.127.514" target="_blank" >10.12693/APhysPolA.127.514</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nuclear Magnetic Resonance in Hexaferrite/Maghemite Composite Nanoparticles

Popis výsledku v původním jazyce

Due to their bio-compatibility and non-toxicity, ferrimagnetic iron oxides are suitable for various medical applications. In the case of hyperthermia, the promising approach how to reach desired magnetic properties is to combine more phases into a composite material. A series of samples containing maghemite and M-hexaferrite was prepared by sol gel method with subsequent thermal treatment where annealing temperature and time were varied. The samples were characterized by X-ray diffraction. In this paperwe focused mainly on application of nuclear magnetic resonance spectroscopy to investigate these strongly inhomogeneous nanopaxticle composites. Frequency-swept Fe-57 NMR spectra of nanoparticle samples were measured in a zero external magnetic field at4.2 K. Utilizing differences in optimal excitation field strengths and in relaxation times, we were able to resolve NMR signal assigned to hexagonal ferrite of M-phase from signal which showed features attributed to maghemite.

Název v anglickém jazyce

Nuclear Magnetic Resonance in Hexaferrite/Maghemite Composite Nanoparticles

Popis výsledku anglicky

Due to their bio-compatibility and non-toxicity, ferrimagnetic iron oxides are suitable for various medical applications. In the case of hyperthermia, the promising approach how to reach desired magnetic properties is to combine more phases into a composite material. A series of samples containing maghemite and M-hexaferrite was prepared by sol gel method with subsequent thermal treatment where annealing temperature and time were varied. The samples were characterized by X-ray diffraction. In this paperwe focused mainly on application of nuclear magnetic resonance spectroscopy to investigate these strongly inhomogeneous nanopaxticle composites. Frequency-swept Fe-57 NMR spectra of nanoparticle samples were measured in a zero external magnetic field at4.2 K. Utilizing differences in optimal excitation field strengths and in relaxation times, we were able to resolve NMR signal assigned to hexagonal ferrite of M-phase from signal which showed features attributed to maghemite.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Physica Polonica A

ISSN

0587-4246

e-ISSN

—

Svazek periodika

127

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

3

Strana od-do

514-516

Kód UT WoS článku

000352139600117

EID výsledku v databázi Scopus

2-s2.0-84927584151