Phase Analysis of Magnetic Inclusions in Nanomaterials Based on Multiwall Carbon Nanotubes

• Authors: K. Brzózka , M. Krajewski , A. Małolepszy , L. Stobiński , T. Szumiata , B. Górka , M. Gawroński , D. Wasik
• Languages of publication: EN

Abstracts

EN

Functionalized multiwall carbon nanotubes as well as nanocomposite based on that material covered by nanoparticles composed of iron oxides were the subject of investigations. In order to identify all iron-bearing phases including those reported on the base of previous X-ray diffraction measurements, the transmission Mössbauer spectroscopy was utilized. The experiments were carried out both at room temperature and also at low temperatures. It was stated that in the investigated nanotubes some impurities were present, originating from the catalyst remains, in form of Fe-C and α -Fe nanoparticles. The Mössbauer spectra collected for the nanocomposite showed a complex shape characteristic of temperature relaxations. The following subspectra related to iron-based phases were identified: sextet attributed to hematite, with hyperfine magnetic field reduced due to the temperature relaxations, sextet corresponding to iron carbide as well as two doublets linked to superparamagnetic hematite and ferrihydrites.

Keywords

EN

61.05.Qr; 61.46.Fg; 61.48.De; 75.50.Tt; 75.75.Cd; 81.07.De

Discipline

• 75.75.Cd: Fabrication of magnetic nanostructures(see also 81.16.-c Methods of micro- and nanofabrication and processing, and 81.07.-b Nanoscale materials and structures: fabrication and characterization)
• 61.48.De: Structure of carbon nanotubes, boron nanotubes, and other related systems(for structure of hollow nanowires, see 61.46.Np)
• 81.07.De: Nanotubes
• 75.50.Tt: Fine-particle systems; nanocrystalline materials
• 61.05.Qr: Magnetic resonance techniques; Mössbauer spectroscopy (for structure determination only)
• 61.46.Fg: Nanotubes

• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 4
• Pages: 863-865

Dates

published

2017-04

Contributors

author

K. Brzózka

• Department of Physics, Faculty of Mechanical Engineering, University of Technology and Humanities in Radom, J. Krasickiego 54, 26-600 Radom, Poland

author

M. Krajewski

• Faculty of Physics, Institute of Experimental Physics, University of Warsaw, L. Pasteura 5, 02-093 Warsaw, Poland

author

A. Małolepszy

• Faculty of Chemical and Process Engineering, Warsaw University of Technology, L. Waryńskiego 1, 00-645 Warsaw, Poland

author

L. Stobiński

• Faculty of Chemical and Process Engineering, Warsaw University of Technology, L. Waryńskiego 1, 00-645 Warsaw, Poland
• Institute of Physical Chemistry, Polish Academy of Sciences, M. Kasprzaka 44/52, 01-224 Warsaw, Poland

author

T. Szumiata

• Department of Physics, Faculty of Mechanical Engineering, University of Technology and Humanities in Radom, J. Krasickiego 54, 26-600 Radom, Poland

author

B. Górka

• Department of Physics, Faculty of Mechanical Engineering, University of Technology and Humanities in Radom, J. Krasickiego 54, 26-600 Radom, Poland

author

M. Gawroński

• Department of Physics, Faculty of Mechanical Engineering, University of Technology and Humanities in Radom, J. Krasickiego 54, 26-600 Radom, Poland

author

D. Wasik

• Faculty of Physics, Institute of Experimental Physics, University of Warsaw, L. Pasteura 5, 02-093 Warsaw, Poland

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Identifiers

DOI

10.12693/APhysPolA.131.863