Abstract
57Fe Mössbauer spectroscopy, XRD, and TEM were used to investigate the effect of mandelic- and salicylic acid coatings on the iron oxide nanoparticles. These two carboxylic acids have similar molecules size and stoichiometry, but different structure and acidity. Significant differences were observed between the Mössbauer spectra of samples coated with mandelic acid and salicylic acid. These results indicate that the occurrence of iron microenvironments in the mandelic- and salicylic acid-coated iron oxide nanoparticles is different. The results can be interpreted in terms of the influence of the acidity of carboxylic acids on the formation, core/shell structure, and oxidation of coated iron oxide nanocomposites.
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Funding
This work was supported by the Hungarian National Research, Development and Innovation Office – NKFIH (K115784 and K115913), the Brazilian CAPES (No. A127/2013), and Hungarian-Croatian Intergovernmental S & T (No. TET 16-1-2016-0002) grants.
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Lengyel, A., Tolnai, G., Klencsár, Z. et al. The effect of carboxylic acids on the oxidation of coated iron oxide nanoparticles. J Nanopart Res 20, 137 (2018). https://doi.org/10.1007/s11051-018-4247-x
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DOI: https://doi.org/10.1007/s11051-018-4247-x