Effect of plasmonic nanoparticles on the electrophysical characteristics of triboelectric layers
DOI:
https://doi.org/10.15330/pcss.27.1.101-107Keywords:
spherical nanoparticles, nanocomposite, effective dielectric function, surface plasmon resonance, triboelectric nanogeneratorAbstract
This paper examines the effect of spherical metal nanoparticles embedded in a triboelectric layer on its electrical properties. A hypothesis is proposed regarding the mechanism by which surface plasmon resonance excited in metal inclusion particles influences the charge density on the contacting surfaces of a triboelectric nanogenerator and its operational characteristics. The effective dielectric function of the spherical metal nanoparticles–polydimethylsiloxane composite is determined using the effective medium approximation. The frequency dependences of the effective dielectric function real and imaginary parts of the triboelectric layer are calculated in the frame of the classical and corrected Maxwell-Garnett models. It is established that the extrema of the dielectric function frequency dependence for the metal nanoparticle–polydimethylsiloxane composite correspond to surface plasmon resonance in the inclusion particles. The effect of the nanoparticle-inclusion size on the nature of the frequency dependences is revealed, namely, an increase in the amplitude of the maxima and their “blue” shift with decreasing particle radius. The polarization charge density on the surface of the triboelectric layer is calculated for spherical inclusion particles of different radii, made of different metals, and at different concentrations. A qualitative similarity is demonstrated between the frequency dependence curves of the effective dielectric function real part and the polarization charge surface density.
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