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Combining Brillouin Light Scattering Spectroscopy and Machine-Learned Interatomic Potentials to Probe Mechanical Properties of Metal-Organic Frameworks.
J Phys Chem Lett
January 2025
Institute of Bioproducts and Paper Technology, Graz University of Technologyy, Inffeldgasse 23, 8010 Graz, Austria.
The mechanical properties of metal-organic frameworks (MOFs) are of high fundamental and practical relevance. A particularly intriguing technique for determining anisotropic elastic tensors is Brillouin scattering, which so far has rarely been used for highly complex materials like MOFs. In the present contribution, we apply this technique to study a newly synthesized MOF-type material, referred to as GUT2.
View Article and Find Full Text PDFStudying the Size-Dependence of Graphene Nanoplatelets (GNPs) in the Final Properties of Polyurethane Aerogels: Thermal Insulation and Mechanical Strength.
Gels
January 2025
Cellular Materials Laboratory (CellMat), Condensed Matter Physics Department, Faculty of Science, Campus Miguel Delibes, University of Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain.
In the present work, the influence of the addition of graphene nanoplatelets presenting different dimensions on polyurethane-polyisocyanurate aerogel structure and properties has been studied. The obtained aerogels synthesized through a sol-gel method have been fully characterized in terms of density, porosity, specific surface area, mechanical stiffness, thermal conductivity, and speed of sound. Opacified aerogels showing high porosity (>92%) and low densities (78-98 kg/m) have been produced, and the effect of the size and content of graphene nanoplatelets has been studied.
View Article and Find Full Text PDFAn experimental study on the synergic damage of chemical solutions and stress to coal.
Sci Rep
January 2025
CSIRO Mineral Resources, Brisbane, QLD, 4069, Australia.
This paper investigates the impact of treatment with chemical solutions of varying pH values on the micro-macroscopic damage in coal samples under load, employing a combination of Small Angle X-ray Scattering (SAXS) experiments and uniaxial compression tests. The experimental results show that soaking coal samples in NaOH, HCl, and distilled water for 7 days leads to reductions in uniaxial compressive strength by 39.19%, 47.
View Article and Find Full Text PDFFirst-principles study of structural, elastic, electronic, transport properties, and dielectric breakdown of CsTe photocathode.
Sci Rep
January 2025
Accelerator Operations and Technology Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, 87545, USA.
The pursuit to operate photocathodes at high accelerating gradients to increase brightness of electron beams is gaining interests within the accelerator community, particularly for applications such as free electron lasers (FEL) and compact accelerators. Cesium telluride (CsTe) is a widely used photocathode material and it is presumed to offer resilience to higher gradients because of its wider band gap compared to other semiconductors. Despite its advantages, crucial material properties of CsTe remain largely unknown both in theory and experiments.
View Article and Find Full Text PDFSpontaneous bilateral thyroid follicular cell carcinoma (subtype: compact cellular carcinoma) with C-cell complexes in a male beagle.
J Toxicol Pathol
January 2025
Safety Research Laboratory, Kissei Pharmaceutical Co., Ltd., 2320-1 Maki, Hotaka, Azumino, Nagano 399-8305, Japan.
We report the features of spontaneous bilateral thyroid follicular cell carcinoma in a 10-year-old male beagle. Necropsy revealed bilateral masses on the trachea, corresponding to the left and right sides of the thyroid gland. The masses were elastic, encapsulated, and distinct, with no connecting tumor tissues between them.
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