Abstract
Comparison of the Mössbauer spectra of the as-prepared native iron oxide nanoparticles (IONs) and the citrate-functionalized IONs demonstrates differences in the spectral shapes at room temperature and variations of the 57Fe hyperfine parameters at 80 K. The observed differences are claimed to result from capping the IONs with citrate, thus decreasing the particle-particle interaction while promoting interaction of the outer atomic layers of the IONs with the surface molecular coating.
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Acknowledgements
The authors thank LabMic-UFG for TEM measurements. M.H.S. and P.C.M. gratefully acknowledge financial support from Brazilian Agencies: Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Fundação de Apoio à Pesquisa do Distrito Federal (FAPDF). M.I.O., M.V.U. and V.A.S. were supported by the Ministry of Science and Higher Education of the Russian Federation and Act 211 of the Government of the Russian Federation, contract № 02.A03.21.0006. E.K. was supported by NKFIH-OTKA (the grant № 131963). This work was carried out within the Agreement of Cooperation between the Ural Federal University (Ekaterinburg) and the Eötvös Loránd University (Budapest).
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This article is part of the Topical Collection on Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME2019), 1-6 September 2019, Dalian, China
Edited by Tao Zhang, Junhu Wang and Xiaodong Wang
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Ushakov, M.V., Sousa, M.H., Morais, P.C. et al. Effect of iron oxide nanoparticles functionalization by citrate analyzed using Mössbauer spectroscopy. Hyperfine Interact 241, 27 (2020). https://doi.org/10.1007/s10751-020-1701-9
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DOI: https://doi.org/10.1007/s10751-020-1701-9