Many-body effective thermal conductivity in phase-change nanoparticle chains due to near-field radiative heat transfer

Abstract

In dense systems composed of numerous nanoparticles, direct simulations of near-field radiative heat transfer (NFRHT) require considerable computational resources. NFRHT for the simple one-dimensional nanoparticle chains embedded in a non-absorbing host medium is investigated from the point of view of the continuum by means of an approach combining the many-body radiative heat transfer theory and the Fourier law. Effects of the phase change of the insulator-metal transition material (VO${}_2$), the complex many-body interaction (MBI) and the host medium relative permittivity on the characteristic effective thermal conductivity (ETC) are analyzed. The ETC for VO${}_2$ nanoparticle chains below the transition temperature can be as high as 50 times of that above the transition temperature due to the phase change effect. The strong coupling in the insulator-phase VO${}_2$ nanoparticle chain accounts for its high ETC as compared to the low ETC for the chain at the metallic phase, where there is a mismatch between the characteristic thermal frequency and resonance frequency. The strong MBI is in favor of the ETC. For SiC nanoparticle chains, the MBI even can double the ETC as compared to those without considering the MBI effect. For the dense chains, a strong MBI enhances the ETC due to the strong inter-particles couplings. When the chains go more and more dilute, the MBI can be neglected safely due to negligible couplings. The host medium relative permittivity significantly affects the inter-particles couplings, which accounts for the permittivity-dependent ETC for the VO${}_2$ nanoparticle chains.

10 figures with captions,27 pages

References in corpus (12)

• Near-field Radiative Heat Transfer in Many-Body Systems
• Resonant photon tunneling enhancement of the radiative heat transfer
• Fluctuating surface-current formulation of radiative heat transfer for arbitrary geometries
• Heat Transport Through Plasmonic Interactions in Closely Spaced Metallic Nanoparticles Chains
• Many body heat radiation and heat transfer in the presence of a non-absorbing background medium
• Radiative Heat Transfer in Fractal Structures
• Multi-tip near-field scanning thermal microscopy
• Radiative heat transfer between metallic nanoparticle clusters in both near field and far field
• Near-field radiative heat transfer between twisted nanoparticle gratings
• Radiative heat flux through a topological Su-Schrieffer-Heeger chain of plasmonic nanoparticles
• Thermal radiative energy exchange between a closely-spaced linear chain of spheres and its environment
• Excitation injector in an atomic chain: long-ranged transport and efficiency amplification

Cited by in corpus (6)

• Spontaneous emission modulation in biaxial hyperbolic van der Waals material
• Photothermal behavior for two-dimensional nanoparticle ensembles: Multiple scattering and thermal accumulation effects
• Normal heat diffusion in many-body system via thermal photons
• Heat radiation and transfer for nanoparticles in the presence of a cylinder
• Favorable and unfavorable many-body interactions for near-field radiative heat transfer in nanoparticle networks
• Twist-induced near-field radiative thermal regulator assisted by cylindrical surface modes