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Searching and designing materials with extremely low lattice thermal conductivity (LTC) has attracted considerable attention in material sciences. Here we systematically demonstrate the diverse lattice dynamics of the ternary Cu-Sb-Se compounds due to the different chemical-bond environments. For Cu3SbSe4 and CuSbSe2, the chemical bond strength is nearly equally distributed in crystalline bulk, and all the atoms are constrained to be around their equilibrium positions. Their thermal transport behaviors are well interpreted by the perturbative phonon-phonon interactions. While for Cu3SbSe3 with obvious chemical-bond hierarchy, one type of atoms is weakly bonded with surrounding atoms, which leads the structure to the part-crystalline state. The part-crystalline state makes a great contribution to the reduction of thermal conductivity that can only be effectively described by including a rattling-like scattering process in addition to the perturbative method. Current results may inspire new approaches to designing materials with low lattice thermal conductivities for high-performance thermoelectric conversion and thermal barrier coatings.
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http://dx.doi.org/10.1038/srep13643 | DOI Listing |
Chem Rev
March 2025
Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
Solvent co-intercalation is a process in which ions and solvents jointly intercalate into a layered electrode material during battery charging/discharging. It typically leads to rapid electrode degradation, but new findings show that it can be highly reversible, lasting several thousand cycles. Solvent co-intercalation has two important characteristics: (1) the charge transfer resistance is minimized as stripping of the solvation shell is eliminated and (2) the fact that solvents become part of the electrode reaction provides another means of designing electrode materials.
View Article and Find Full Text PDFNat Commun
March 2025
Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain.
A critical feature of microtubules is their GTP cap, a stabilizing GTP-tubulin rich region at growing microtubule ends. Microtubules polymerized in the presence of GTP analogs or from GTP hydrolysis-deficient tubulin mutants have been used as GTP-cap mimics for structural and biochemical studies. However, these analogs and mutants generate microtubules with diverse biochemical properties and lattice structures, leaving it unclear what is the most faithful GTP mimic and hence the structure of the GTP cap.
View Article and Find Full Text PDFCryst Growth Des
March 2025
Department of Chemical Engineering, University of Manchester, Manchester M13 9PL, United Kingdom.
The presence of trace amounts of additives during crystal growth can have a significant impact on the physical properties of the crystallizing substrate (e.g., crystal morphology, purity, polymorphic phase, or growth kinetics).
View Article and Find Full Text PDFDent Mater
March 2025
Restorative Dentistry Division, School of Dentistry, IMU University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, 57000 Bukit Jalil, Wilayah Persekutuan, Kuala Lumpur, Malaysia. Electronic address:
Objectives: As artificial atoms, quantum dots are widely used in quantum information research since their individual energy levels may be precisely controlled using gate voltages. The purpose of the study was to modify carbon quantum dots (CQDs) and evaluate its effects on the structure, crystal orientation and mechanical properties of the enamel substrate along with antibacterial properties of CQDs.
Materials And Methods: Enamel specimens of 4 mm × 4 mm × 3 mm were cut and CQD solution was dialyzed in deionized water mixed with urea solution and placed in microwave system (800 W) to obtain *CQD, **CQD, ***CQD, and *****CQD for enamel blocks to be immersed for 2 weeks.
Chem Sci
March 2025
William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University Columbus OH 43210 USA
Chemical looping technologies offer a promising pathway for clean energy production, addressing the urgent need for decarbonization in light of escalating global energy demands and climate change concerns. This review explores the metal ferrite oxygen carriers in chemical looping applications, emphasizing their versatility in handling diverse feedstocks-from gases like methane to solids like plastics-and their robust performance in terms of stability and efficiency. The ferrite derivative chemical looping reactions involve the transfer of lattice oxygen from the metal ferrites to the fuel, enhancing fuel conversion without direct emission of pollutants.
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