Magnetic Properties of Iron Catalyst Particles in HiPco Single Wall Carbon Nanotubes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F11%3A10103780" target="_blank" >RIV/00216208:11320/11:10103780 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/11:00367520 RIV/61388955:_____/11:00367520

Výsledek na webu

<a href="http://pubs.acs.org/doi/abs/10.1021/jp203365g" target="_blank" >http://pubs.acs.org/doi/abs/10.1021/jp203365g</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/jp203365g" target="_blank" >10.1021/jp203365g</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetic Properties of Iron Catalyst Particles in HiPco Single Wall Carbon Nanotubes

Popis výsledku v původním jazyce

We have investigated the magnetic response of residual metal catalyst in the raw and super purified HiPco single wall carbon nanotubes (HiPco_raw and HiPco_SP SWCNTs). It has been shown that the residual metal catalyst is in the form of nanoparticles, even in the HiPco_SP SWCNTs that should contain a minimal amount of the metal. Mossbauer spectroscopy of the HiPco_raw SWCNTs proved the catalyst nanoparticles are in the form of Fe(3)C. Analysis of the synchrotron X-ray diffraction data provided an average diameter of nanoparticles about 1.9 am. Magnetic studies by means of temperature dependence of magnetization, magnetization isotherms and susceptibility suggested that the nanoparticles obey the behavior of weakly interacting superparamagnetic systemsin both samples. Further analysis of the data revealed a core-shell structure of the nanoparticles in the HiPco_raw nanotubes, with a magnetically oriented core and a paramagnetic shell, which is almost removed in the case of the HiPco_SP

Název v anglickém jazyce

Magnetic Properties of Iron Catalyst Particles in HiPco Single Wall Carbon Nanotubes

Popis výsledku anglicky

We have investigated the magnetic response of residual metal catalyst in the raw and super purified HiPco single wall carbon nanotubes (HiPco_raw and HiPco_SP SWCNTs). It has been shown that the residual metal catalyst is in the form of nanoparticles, even in the HiPco_SP SWCNTs that should contain a minimal amount of the metal. Mossbauer spectroscopy of the HiPco_raw SWCNTs proved the catalyst nanoparticles are in the form of Fe(3)C. Analysis of the synchrotron X-ray diffraction data provided an average diameter of nanoparticles about 1.9 am. Magnetic studies by means of temperature dependence of magnetization, magnetization isotherms and susceptibility suggested that the nanoparticles obey the behavior of weakly interacting superparamagnetic systemsin both samples. Further analysis of the data revealed a core-shell structure of the nanoparticles in the HiPco_raw nanotubes, with a magnetically oriented core and a paramagnetic shell, which is almost removed in the case of the HiPco_SP

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/GAP204%2F10%2F1677" target="_blank" >GAP204/10/1677: Magnetické vlastnosti uhlíkových nanotub v neutrálním a dopovaném stavu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

—

Svazek periodika

115

Číslo periodika v rámci svazku

35

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

17303-17309

Kód UT WoS článku

000294386000010

EID výsledku v databázi Scopus

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