Number of the records: 1
Magnetic properties of iron catalyst particles in HiPco single wall carbon nanotubes
- 1.
SYSNO ASEP 0367520 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Magnetic properties of iron catalyst particles in HiPco single wall carbon nanotubes Author(s) Bittová, Barbara (FZU-D)
Poltierová Vejpravová, Jana (FZU-D) RID
Kalbáč, Martin (UFCH-W) RID, ORCID
Burianová, Simona (FZU-D)
Mantlíková, A. (CZ)
Daniš, S. (CZ)
Doyle, S. (DE)Source Title Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
Roč. 115, č. 35 (2011), s. 17303-17309Number of pages 7 s. Language eng - English Country US - United States Keywords metal catalyst particles ; carbon nanotubes ; superparamagnet ; core-shell model ; inter-particle interactions Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GAP204/10/1677 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100520 - FZU-D (2005-2011) AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000294386000010 DOI 10.1021/jp203365g Annotation 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_SPSWCNTs). 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. Moessbauer spectroscopy of the HiPco_raw SWCNTs proved the catalyst nanoparticles are in the form of Fe3C. Analysis of the synchrotron X-ray diffraction data provided an average diameter of nanoparticles about 1.9 nm. Magnetic studies by means of temperature dependence of magnetization, magnetization isotherms and susceptibility suggested that the nanoparticles obey the behavior of weakly interacting superparamagnetic systems in both samples. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
Number of the records: 1