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Mössbauer spectroscopy control of the preparation of citric- and mandelic acid functionalized nanomagnetites

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Abstract

Iron-oxide nanoparticles were prepared by two ways of chemical methods when the coprecipitated nanomagnetites were functionalized by different (citric and mandelic) carboxylic acids. The colloid samples were characterized by 57Fe Mössbauer spectroscopy, electron microscopy, RAMAN spectroscopy and magnetization measurements. Considerable paramagnetic contributions are present in the 80 K Mössbauer spectra in both citric acid coated and mandelic acid coated nanomagnetites. The 5 K measurement revealed that the paramagnetic component appearing at 80 K can represent a superparamagnetic fraction due to the small particle size in the case of mandelic acid functionalized sample. However, in the case of citric acid functionalized nanomagnetite sample, the paramagnetic components occurring also in the 5 K spectra can be associated with components of precursors and of by-product phases.

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Acknowledgements

The financial supports from the CAPES (No A127/2013) and NKFIH-OTKA (No K115913 and K115784) as well as Hungarian-Croatian S&T (No TÉT_16-1-2016-0002) grants are acknowledged.

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Author notes

  1. A. Lengyel

    Present address: Wigner Research Centre for Physics, HAS, Budapest, Hungary

Authors and Affiliations

  1. Institute of Chemistry, Eötvös Loránd University, Budapest, Hungary

    A. Lengyel, Z. Homonnay & E. Kuzmann

  2. Department of Physics, University of Brasília, Brasília, DF, Brazil

    V. K. Garg, A. C. de Oliveira, S. W. da Silva & J. A. H. Coaquira

  3. State University of Goiás, Anápolis, Goiás, Brazil

    L. R. Guilherme

  4. Nuclear Analysis and Radiography Department, Centre for Energy Research, HAS, Budapest, Hungary

    Z. Klencsár

  5. Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary

    Gy. Tolnai

Authors
  1. A. Lengyel
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  2. V. K. Garg
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  3. A. C. de Oliveira
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  4. S. W. da Silva
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  5. L. R. Guilherme
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  6. Z. Klencsár
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  7. Z. Homonnay
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  8. J. A. H. Coaquira
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  9. Gy. Tolnai
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  10. E. Kuzmann
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Corresponding author

Correspondence to E. Kuzmann.

Additional information

This article is part of the Topical Collection on Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME 2017), Saint-Petersburg, Russia, 3–8 September 2017

Edited by Valentin Semenov

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Lengyel, A., Garg, V.K., de Oliveira, A.C. et al. Mössbauer spectroscopy control of the preparation of citric- and mandelic acid functionalized nanomagnetites. Hyperfine Interact 239, 17 (2018). https://doi.org/10.1007/s10751-018-1493-3

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  • DOI: https://doi.org/10.1007/s10751-018-1493-3

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