The Role of Diffusion-Controlled Growth in the Formation of Uniform Iron Oxide Nanoparticles with a Link to Magnetic Hyperthermia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00478848" target="_blank" >RIV/68081723:_____/17:00478848 - isvavai.cz</a>

Alternative codes found

RIV/70883521:28610/17:63516585

Result on the web

<a href="http://dx.doi.org/10.1021/acs.cgd.6b01104" target="_blank" >http://dx.doi.org/10.1021/acs.cgd.6b01104</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.cgd.6b01104" target="_blank" >10.1021/acs.cgd.6b01104</a>

Result language

angličtina

Original language name

The Role of Diffusion-Controlled Growth in the Formation of Uniform Iron Oxide Nanoparticles with a Link to Magnetic Hyperthermia

Original language description

Uniform superparamagnetic iron oxide nanoparticles were obtained by coprecipitation under synthesis conditions that guarantee diffusion-controlled growth. Study of nanoparticle crystal structure formation by HRTEM showed that at the earlier stage of the reaction some nanoparticles consist of crystalline core and amorphous surface layer, whereas resulting particles display a high degree of crystalline order. This result suggests that nanoparticles are formed from fusion of noncrystalline primary particles of iron (hydr)oxide. Slow addition of iron salts to excess ammonia restricts the amount of primary particles, as a result, their diffusion is the limiting step of the reaction, which provides the formation of uniform nanoparticles. Importantly, 5 min reaction product shows the same polydispersity and heating efficiency as the final product. Thus, monodispersity determines the particle properties and facilitates the control of heat generation for a given amplitude and frequency of AMF. Magnetic dipole interactions between single nanoparticles lead to the formation of dense aggregates (multicore particles) at the beginning of the reaction. The dispersions of separated multicore particles with hydrodynamic size of about 85 nm shows higher heating efficiency than dispersion of as-prepared nanoparticles. The increase of aggregate size leads to a decrease of heating efficiency to the value of as-prepared nanoparticles due to a demagnetizing effect.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Name of the periodical

Crystal Growth & Design

ISSN

1528-7483

e-ISSN

—

Volume of the periodical

17

Issue of the periodical within the volume

5

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

2323-2332

UT code for WoS article

000400802500005

EID of the result in the Scopus database

2-s2.0-85018993308