Vanadium tetrasulfide (VS4) with a beneficial one-dimensional atomic-chain structure is reported to be able to serve as a favorable intercalation cathode material for a high-performance Zn-ion battery.

No abstract

Twelve watermelon [Citrullus vulgaris (Thunb.) Schrad (Cucurbitaceae)] cultivars with different flesh colors were analyzed by HPLC, GC-FID, and GC-MS for their differences in carotenoid, soluble sugar, organic acid, and flavor. Results showed that all-trans violaxanthin, 9-cis-violaxanthin, and luteoxanthin were the main carotenoid esters in watermelons with yellow flesh. However, watermelons with red flesh were rich in all-trans lycopene and their cis-isomers. High concentrations of β-carotene and pro-lycopenes were found in watermelon with orangeyellow flesh. Large variations in the sucrose concentration were observed among the different watermelons. Sucrose and/or fructose were the dominant sugars, while citric acid and malic acid were the main organic acids in watermelon flesh. Limonene was detected in the watermelon flesh of all investigated genotypes. Interestingly, partial correlation analysis of the chemical concentrations revealed 2 significant (p<0.01) positive correlations between β-ionone and β-carotene, and between (E)-geranyl acetone and prolycopenes.

Low-temperature scanning tunneling microscopy at 7 K is used to assemble monatomic native adatom chains on a Cu(111) surface and to study their sp-derived quantum states. The adatoms within the structure reside on equivalent nearest-neighbor lattice sites of the substrate surface (intrinsic Cu-Cu spacing 2.55 Å). Starting from linear chain segments, kinked chains and triple-terminal junctions are created, and the impact of the different structural details of the junction on the electronic properties is investigated by spectroscopic measurements. A simple tight-binding (TB) parameterization scheme is applied to discuss the experimentally observed energies and densities of the quantum states inherent to these chain structures of advanced complexity. The TB model also reveals potential overlaps of resonance-broadened states, which are not resolved in the experiment.

No abstract

No abstract

No abstract

No abstract