Recent studies have revealed that single-layer transition-metal oxides and dichalcogenides (MX2) might offer properties superior to those of graphene. So far, only very few MX2 compounds have been synthesized as suspended single layers, and some of them have been exfoliated as thin sheets. Using first-principles structure optimization and phonon calculations based on density functional theory, we predict that, out of 88 different combinations of MX2 compounds, several of them can be stable in free-standing, single-layer honeycomb-like structures. These materials have two-dimensional hexagonal lattices and have top-view appearances as if they consisted of either honeycombs or centered honeycombs. However, their bonding is different from that of graphene; they can be viewed as a positively charged plane of transition-metal atoms sandwiched between two planes of negatively charged oxygen or chalcogen atoms. Electron correlation in transition-metal oxides was treated by including Coulomb repulsion through LDA...

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Stable, Single-Layer MX2 Transition-Metal Oxides and Dichalcogenides in a Honeycomb-Like Structure

Aqueous rechargeable batteries are promising for grid storage and electric vehicles, but they suffer from poor cycle life due to anode instability. Exploiting stable ion-coordination charge storage and chemical inertness towards aqueous electrolytes, quinones are now reported as stable anodes.

Universal quinone electrodes for long cycle life aqueous rechargeable batteries

Why the impact factor of journals should not be used for evaluating research

https://iris.unito.it/bitstream/2318/1695314/1/HE-S-18-04814-final.pdf

Application of Hydrides in Hydrogen Storage and Compression: Achievements, Outlook and Perspectives

The aqueous geochemistry of gallium, germanium, indium and scandium

Fractal model of heat capacity for substances with diamond-like structures☆

Heat capacity and thermodynamic functions of LuPO4 in the range 0–320 K

A calorimeter for heat capacity measurements from 50 to 300 k: the heat capacities of kogarkoite na3so4f(cr) at low temperatures

Geological–geophysical data obtained by the Galileo spacecraft during its traveling around Jupiter’s satellites suggest the presence of a water layer (in terrestrial terms, marine or oceanic water) from tens (Europe) to a few hundred (Ganymede and Callisto) kilometers thick beneath an outer solid ice shell [1–2]. The oceans of Europa, Ganymede, and Callsito are supposedly high-pressure electrolytic solutions. The presence of water supports the hypotheses of the existence of primitive extraterrestrial life forms in the surface ocean. The outer shells of Jupiter’s icy satellites consist mainly of H 2 O ice contaminated with dark non-ice component (carbonaceous chondrite-type matter). The data obtained by the Galileo probe point out the presence of mixtures of salt crystal hydrates ( MgSO 4 · n H 2 O, Na 2 SO 4 · n H 2 O , and others) on the ice surface of the satellites [3].

K. S. Gavrichev

Papers

Fractal model of heat capacity for substances with diamond-like structures☆

Heat capacity and thermodynamic functions of LuPO4 in the range 0–320 K

A calorimeter for heat capacity measurements from 50 to 300 k: the heat capacities of kogarkoite na3so4f(cr) at low temperatures

Heat capacity and thermodynamic functions of epsomite MgSO4 · 7 H2O at 0–303 K

Refined heat capacity of LaPO4 in the temperature range 0–1600 K