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  1. Rhenium diboride (ReB2) exhibits high differential strain due to its puckered boron sheets that impede shear deformation. Here, we demonstrate the use of solid solution formation to enhance the Vickers hardness and differential strain of ReB2. ReB2-structured solid solutions (Re0.98Os0.02B2 and Re0.98Ru0.02B2, noted as “ReOsB2” and “ReRuB2”) were synthesized via arc-melting from the pure elements. In-situ high-pressure radial x-ray diffraction was performed in the diamond anvil cell to study the incompressibility and lattice strain of ReOsB2 and ReRuB2 up to ∼56 GPa. Both solid solutions exhibit higher incompressibility and differential strain than pure ReB2. However, while all lattice planes are strengthened by doping osmium (Os) into the ReB2 structure, only the weakest ReB2 lattice plane is enhanced with ruthenium (Ru). These results are in agreement with the Vickers hardness measurements of the two systems, where higher hardness was observed in ReOsB2. The combination of high-pressure studies with experimentally observed hardness data provides lattice specific information about the strengthening mechanisms behind the intrinsic hardness enhancement of the ReB2 system. 
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    We report our discovery of utilizing perhydroxylated dodecaborate clusters ([B 12 (OH) 12 ] 2− ) as a molecular cross-linker to generate a hybrid tungsten oxide material. The reaction of [N n Bu 4 ] 2 [B 12 (OH) 12 ] with WCl 6 , followed by subsequent annealing of the product at 500 °C in air successfully produces a tungsten oxide material cross-linked with B 12 -based clusters. The comprehensive structural study of the produced hybrid material confirms a cross-linked network of intact boron-rich clusters and tungsten oxides. We further demonstrate how these robust B 12 -based clusters in the resulting hybrid tungsten oxide material can effectively preserve the specific capacitance up to 4000 cycles and reduce the charge transfer resistance as well as the response time compared to that of pristine tungsten oxide. Ultimately, this work highlights a promising capability of boron-rich clusters in hybrid metal oxides to obtain fast and stable supercapacitors with high capacitance. 
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  6. Abstract

    Silver nanovines, prepared at ambient pressure and temperature, were grown in solution using eutectic gallium‐indium (EGaIn) seeds. In this process, EGaIn serves both as an effective reductant and heterogeneous nucleation center enabling the selective growth of silver nanovines from aqueous silver nitrate solutions. This process is a versatile route towards grafted silver nanostructures performed under ambient conditions with non‐toxic reagents.

     
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