Prediction of thermal radiative properties (300–1000 K) of La2NiO4+δ ceramics.

A multiscale numerical model is developed to predict the thermal radiative properties (TRP) of rough La2NiO4+δ coatings. The model integrates intrinsic and extrinsic contributions related to the chemical composition and the texture, respectively. High-temperature infrared reflectivity and thermogravimetric measurements on a La2NiO4+δ single crystal make it possible to understand the role of the excess oxygen in the intrinsic TRP. We show that dense ceramics with thicknesses higher than 4 μm are optically thick, and that one can adjust the surface roughness parameters to predict their TRP

Persistent M2 phase in strongly strained (011)-oriented grains in VO2 films grown on sapphire (001) in reactive sputtering

This work was supported by a Grant-in-Aid for Scientific Research (Grant No. 15K04652) from the Japan Society for the Promotion of Science.We report on the first observation of the persistent M2 phase in strongly strained (011)-oriented grains in VO₂ films grown on Al₂O₃ (001) substrates by means of conventional rf reactive sputtering under adequate deposition conditions. Spatially resolved micro-Raman spectra clearly showed that (011)-oriented large crystalline grains with the cR-axis parallel to the substrate resulted in the appearance of the M2 phase over a wide temperature range of 30 °C. A close correlation of the appearance range of the M2 phase with the in-plane tensile stress of (011)-oriented grains was revealed by X-ray diffraction. We present a phase diagram for the M1, M2, and R phases in relation to the stress of (011)-oriented grains and temperature. It was shown that (011)-oriented micrometer-sized long grains play a crucial role in the emerging structural phase transition (SPT) via an M2 phase even in a film grown on Al₂O₃ (001), which is ordinarily reserved for the (020)-oriented VO₂ growth. The results shown here will contribute to make clear the conditions for obtaining VO₂ films with the appearance of the M2 phase in their SPT process

Nitrogen and group-IV (Si, Ge) vacancy color centres in nano-diamonds: photoluminescence study at high temperature (25 °C–600 °C)

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Raman study of metal–insulator transition in NdNiO3 thin films

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Oriented and polycrystalline NdNiO3 thin films on silicon substrate

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Electronic conduction and microstructure in polymer composites filled with carbonaceous particles.

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Electron diffraction and Raman scattering evidence of a symmetry breaking at the metal-insulator transition of NdNiO 3

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New Adsorbent Material Based on Nitrothiophene-Functionalized Silica Particles for Aqueous Heavy Metals Removal

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X-ray diffraction investigation of the relationship between strains and metal-insulator transition in NdNiO3 thin films

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Electron doped (Sm1−x,Cax)MnO3 perovskite manganite as potential infrared thermochromic switch

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