Analysis of metal catalyst content in magnetically filtered SWCNTs by SQUID magnetometry
Result description
Removal of the residual magnetic metal catalyst from the single-wall carbon nanotubes (SWCNTs) is important prerequisite for many further applications. We present here a facile analysis method enabling direct control of the removed fraction of the catalyst nanoparticles (NPs) after purification. Determination of distribution of the magnetic moments attributed to the catalyst NPs enables proper interpretation of the efficiency and mechanism of the used purification process. The study has been performed on the SWCNTs containing magnetic metal NPs, exposed to sonication and magnetic filtration. Two different SWCNT precursors (HiPco and laser ablation SWCNTs), three solvents and multiple filtration steps, respectively, have been tested. Magnetic property measurements are supported by the results of thermal decomposition and Raman spectroscopy.
Keywords
single-wall carbon nanotubesnanoparticlesmagnetic filtrationSQUID
The result's identifiers
Result code in IS VaVaI
Alternative codes found
RIV/68378271:_____/15:00454055 RIV/61989592:15310/15:33157048
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Analysis of metal catalyst content in magnetically filtered SWCNTs by SQUID magnetometry
Original language description
Removal of the residual magnetic metal catalyst from the single-wall carbon nanotubes (SWCNTs) is important prerequisite for many further applications. We present here a facile analysis method enabling direct control of the removed fraction of the catalyst nanoparticles (NPs) after purification. Determination of distribution of the magnetic moments attributed to the catalyst NPs enables proper interpretation of the efficiency and mechanism of the used purification process. The study has been performed on the SWCNTs containing magnetic metal NPs, exposed to sonication and magnetic filtration. Two different SWCNT precursors (HiPco and laser ablation SWCNTs), three solvents and multiple filtration steps, respectively, have been tested. Magnetic property measurements are supported by the results of thermal decomposition and Raman spectroscopy.
Czech name
—
Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
GAP204/10/1677: Magnetic properties of carbon nanostructures in neutral and doped state
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Materials Science
ISSN
0022-2461
e-ISSN
—
Volume of the periodical
50
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
2544-2553
UT code for WoS article
000348978000020
EID of the result in the Scopus database
2-s2.0-84925484049
Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
BM - Solid-state physics and magnetism
Year of implementation
2015