Miguel Goni

TL;DR: Experimental evidence that departs from conventional theory predicts that ultrahigh lattice thermal conductivity can only occur in crystals composed of strongly bonded light elements is reported, showing BAs to be the only known semiconductor with ultrahigh thermal conductivities.

TL;DR: In this paper, the authors used frequency domain thermoreflectance to study the crossplane thermal transport in mechanically exfoliated MoS2 samples supported on SiO2 and muscovite mica substrates.

TL;DR: In this paper, the Langmuir-Blodgett (LB) technique was used to deposit nanometer-thick films of polyvinyl acetate (PVAc) on silicon and gold substrates in two distinct states: Liquid condensed (Lc) and Liquid expanded (Le).

TL;DR: An optical technique based on frequency domain thermoreflectance (FDTR) that is capable of measuring the thermal conductivity of individual particles a few microns across is presented and can provide values for a particle's effective volume which is new capability compared to conventional FDTR applied to multilayer samples.

Abstract: Particle-matrix interfaces can play an important role in heat propagation through particulate composites We investigated the possibility of using frequency domain thermoreflectance combined with a numerical thermal model to measure in situ the thermal resistance of the particle-matrix interface in particulate composite materials We found that the sensitivity of the technique depended on the matrix thermal conductivity, the particle size, and the value of the interface thermal resistance In general, high thermal conductivity matrix materials and small particles will present higher sensitivity to the interface thermal resistance We tested the technique with diamond particles embedded in tin and showed that the interface thermal resistance could be measured for these samples