Počet záznamů: 1
Magnetic properties of iron catalyst particles in HiPco single wall carbon nanotubes
- 1.0367520 - FZÚ 2012 RIV US eng J - Článek v odborném periodiku
Bittová, Barbara - Poltierová Vejpravová, Jana - Kalbáč, Martin - Burianová, Simona - Mantlíková, A. - Daniš, S. - Doyle, S.
Magnetic properties of iron catalyst particles in HiPco single wall carbon nanotubes.
Journal of Physical Chemistry C. Roč. 115, č. 35 (2011), s. 17303-17309. ISSN 1932-7447. E-ISSN 1932-7455
Grant CEP: GA ČR GAP204/10/1677
Výzkumný záměr: CEZ:AV0Z10100520; CEZ:AV0Z40400503
Klíčová slova: metal catalyst particles * carbon nanotubes * superparamagnet * core-shell model * inter-particle interactions
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 4.805, rok: 2011
http://pubs.acs.org/doi/abs/10.1021/jp203365g
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.
Trvalý link: http://hdl.handle.net/11104/0202172
Počet záznamů: 1