Issues »  Volume 48, Issue 6

Properties of a Triboelectric Layer with Embedded Spheroidal Metallic Nanoparticles

A. V. Korotun$^{1,2}$, V. P. Kurbats’kyy$^{1}$, R. Yu. Korol’kov$^{1}$, H. V. Moroz$^{1}$

$^{1}$Zaporizhzhia Polytechnic National University, 64 Universytets’ka Str., UA-69011 Zaporizhzhya, Ukraine
$^{2}$G. V. Kurdyumov Institute for Metal Physics, N.A.S. of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine

Received: 04.05.2026; final version - 15.05.2026. Download: PDF

In recent years, it is experimentally established that the efficiency of triboelectric generators increases, when surface-plasmon resonances are excited in metallic nanostructures or nanoparticles embedded into the active layer of the generator. We believe, this improved performance of triboelectric generators is explained by an increase in charge density on the contacting surfaces of the triboelectric layers due to polarization in the near-surface active region with excited plasmons under the influence of the triboelectric-charge field. In this paper, we investigate the properties of triboelectric layers being the polydimethylsiloxane (PDMS)–metallic nanoparticles’ composite medium. The particles are assumed prolate or oblate spheroids randomly distributed within the triboelectric layer and irradiated with natural light. Since the process of plasmon generation in the inclusion particles is frequency-dependent, we use a frequency-dependent dielectric function to study the influence of plasmon resonance on the characteristics of the triboelectric layer. Within the Maxwell Garnett model for an effective medium and the same with a size correction, the effective dielectric function of the triboelectric layer, the polarization-charge density on its surface, and the figure-of-merit (FOM) of the triboelectric material are calculated and a comparison of the results is carried out to assess the significance of the size correction. The influence of the eccentricity, material, and volume fraction of the inclusion particles on the real and imaginary parts of the effective dielectric function, the relative polarization-charge surface density, and FOM are investigated and discussed. As found, the material of the embedded nanoparticles and their volume fraction influence significantly the characteristics of the triboelectric layer. As demonstrated, the embedding of prolate spheroidal particles into the triboelectric layer leads to a higher triboelectric-charge surface density and a higher FOM value compared to oblate spheroids.

Key words: triboelectric nanogenerator, spheroidal metal nanoparticle, effective dielectric function, polarization charge, figure-of-merit of the triboelectric material.

URL: https://mfint.imp.kiev.ua/en/abstract/v48/i06/0549.html

DOI: https://doi.org/10.15407/mfint.48.06.0549

PACS: 46.55.+d, 73.20.Mf, 77.22.Ch, 77.22.Ej, 78.67.Sc, 79.60.Jv, 82.35.Np

Citation: A. V. Korotun, V. P. Kurbats’kyy, R. Yu. Korol’kov, and H. V. Moroz, Properties of a Triboelectric Layer with Embedded Spheroidal Metallic Nanoparticles, Metallofiz. Noveishie Tekhnol., 48, No. 6: 549–568 (2026) (in Ukrainian)

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