Fe₂O₃ and Gd₂O₃ Nanoparticles Embedded in Mesoporous Silica: Magnetic Properties Comparison

• Authors: O. Kapusta , A. Zeleňáková , P. Hrubovčák , V. Girman , V. Zeleňák
• Languages of publication: EN

Abstracts

EN

Nanocomposite materials containing Fe₂O₃ and Gd₂O₃ nanoparticles with the same concentration were prepared by nanocasting method. At this procedure silica matrix serves as nanoreactor for growth of nanoparticles. Temperature and external dc field dependences of the magnetization both samples were compared. Composite containing Fe₂O₃ nanoparticles shows superparamagnetic behaviour with blocking temperature around 45 K. Otherwise, paramagnetic properties were observed for the sample with Gd₂O₃ (above 10 K). Additionally, due to free pores the silica matrix could serve as medium to increase the number of bonded water molecules. These properties together with appropriate magnetic characteristics make studied materials suitable for magnetic resonance imaging applications.

Keywords

EN

07.78.+s; 47.11.Kb; 75.75.Cd; 75.40.Cx; 78.20.-e

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)
• 47.11.Kb: Spectral methods
• 75.40.Cx: Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
• 07.78.+s: Electron, positron, and ion microscopes; electron diffractometers
• 78.20.-e: Optical properties of bulk materials and thin films(for optical properties related to materials treatment, see 81.40.Tv; for optical materials, see 42.70-a; for optical properties of superconductors, see 74.25.Gz; for optical properties of rocks and minerals, see 91.60.Mk; for optical properties of specific thin films, see 78.66.-w)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 4
• Pages: 860-862

Dates

published

2017-04

Contributors

author

O. Kapusta

• Institute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia

author

A. Zeleňáková

• Institute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia

author

P. Hrubovčák

• Institute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia

author

V. Girman

• Institute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia

author

V. Zeleňák

• Institute of Chemistry, Faculty of Sciences, P.J. Šafárik University, Moyzesova 11, 040 01 Košice, Slovakia

References

• [1] D. Niu, X. Luo, Y. Li, X. Liu, X. Wang, J. Shi, Appl. Mater. Interf. 5, 9942 (2013), doi: 10.1039/C6RA05648B
• [2] S. Santra, S.D. Jativa, C. Kaittanis, G. Normand, J. Grimm, J.M. Perez, ACS Nano 8, 7281 (2012), doi: 10.1021/nn302393e
• [3] Y.-S. Lin, Y. Hung, J.-K. Su, R. Lee, C. Chang, M.-L. Lin, C.-Y. Mou, J. Phys. Chem. B 108, 15608 (2004), doi: 10.1021/jp047829a
• [4] D. Zhao, Q. Huo, J. Feng, B.F. Chmelka, G.D. Stucky, J. Am. Chem. Soc. 120, 6024 (1998), doi: 10.1021/ja974025i
• [5] V. Zelenak, A. Zelenakova, J. Kovac, U. Vainio, Nanocasting of Gd_2O_3 in porous silica matrix, DESY, annual report file, Hamburg 2011 http://photon-science.desy.de/annual_report/files/2010/20101237.pdf
• [6] V. Zelenak, A. Zelenakova, J. Kovac, U. Vainio, N. Murafa, J. Phys. Chem. C 113, 13045 (2009), doi: 10.1021/jp9007653
• [7] A. Zelenakova, O. Kapusta, V. Zelenak, Acta Phys. Pol. A 126, 218 (2014), doi: 10.1021/jp9007653
• [8] S.A. Khan, S. Gambhir, A. Ahmad, Beilstein J. Nanotechnol. 5, 249 (2014), doi: 10.3762/bjnano.5.27

Identifiers

DOI

10.12693/APhysPolA.131.860