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Anharmonic Interatomic Potential Parameters Determined via EXAFS Cumulant Analysis for Pt–Fe Nanoparticles in a Polymer Matrix

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Abstract—

Pt–Fe nanoparticles with a core–shell structure stabilized in polyethylene are studied via X-ray absorption spectroscopy. The temperature-dependent PtLIII-edge EXAFS (extended X-ray absorption fine structure) spectra of nanoparticle nuclei, consisting of platinum atoms, provide information on the interatomic-potential anharmonicity parameters along with the melting point Tmelt and the Debye temperature, which are found to be 1630 and 208 K, respectively. This is much lower than for bulk platinum, where the values are 2041.4 and 233 K, respectively.

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Funding

This work was supported within the framework of the State Task in the field of science (project no. 3.6105.2017/8.9).

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Authors and Affiliations

  1. Research Institute of Physics, Southern Federal University, 344090, Rostov-on-Don, Russia

    S. S. Podsukhina, A. V. Kozinkin & V. G. Vlasenko

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  1. S. S. Podsukhina
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  2. A. V. Kozinkin
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  3. V. G. Vlasenko
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Correspondence to S. S. Podsukhina or V. G. Vlasenko.

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Translated by O. Maslova

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Podsukhina, S.S., Kozinkin, A.V. & Vlasenko, V.G. Anharmonic Interatomic Potential Parameters Determined via EXAFS Cumulant Analysis for Pt–Fe Nanoparticles in a Polymer Matrix. J. Surf. Investig. 13, 914–918 (2019). https://doi.org/10.1134/S1027451019050318

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