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We studied the electrochemical reaction of lithium with the pseudo-layered compounds Cr5−yTiySe8(y= 1, 2, 3, 4, 4.5). About 16 Li ions per formula unit can be inserted reversibly corresponding to a specific capacity of about 500 mAh g−1. The electrical potential where the discharge process occurs is decreasing monotonically with increasing titanium content y. The voltage of the discharge process can be adjusted viathe titanium content between 0.8 and 0.35 V. [ABSTRACT FROM AUTHOR]

The microscopic Li diffusion parameters in the lithiated spinel Li4+xTi5O12, which is on its way to become a commercially used anode material in Li ion batteries, are probed for the first time via nuclear magnetic resonance spectroscopy. [ABSTRACT FROM AUTHOR]

Abstract??The aqueous reaction of ammonium tetrathiometalates (NH4)2[MS4] (M?=?Mo or W) with (dbtmen)Br2? 2H2O (dbtmen?=?N,N?-dibenzyl-N,N,N?,N?-tetramethylethylenediammonium dication) results in the formation of the highly insoluble compounds (dbtmen)[MoS4](1)and (dbtmen)[WS4](2)in near quantitative yields. Compounds(1)and(2)have been characterized by elemental analysis, spectroscopic methods, X-ray powder diffraction and TG?DTA. Both compounds exhibit nearly identical IR spectra and X-ray powder patterns. The compounds exhibit a single strong signal for the asymmetric M?S stretching vibration at 475?cm?1in(1)and at 457?cm?1in(2). Complex(2)is thermally more stable than the corresponding Mo analogue(1). Thermal decomposition products of(1)and(2)are carbon contaminated amorphous metal disulfides and are formulated as MoS1.99C2.06N0.07and WS1.75C3.02based on elemental analysis of the residue. [ABSTRACT FROM AUTHOR]

Summary. Yellow crystals of the title compound were obtained under solvothermal conditions reacting elemental Zn, Sb, and S in a solution of tris(2-aminoethyl)amine (=? tren) and water. The compound crystallises in the monoclinic space group P2 1/c with a=13.0247(7), b=22.308(2), c=12.1776(6) Ä, and ß=105.352(6)°. In the structure of [Zn( tren)] 2Sb 4S 8·0.75 H 2O two [Zn( tren)] 2+ cations are bound to the [Sb 4S 8] 4- anion via S atoms. The Zn 2+ ions are in a trigonal bipyramidal environment of four N atoms of the tetradentate tren ligand and one S atom of the [Sb 4S 8] 4- anion. The anion is formed by SbS 3 and SbS 4 units which share common corners and edges. The interconnection mode yields three different non-planar Sb 2S 2 heterorings. The shortest intermolecular Sb?S distance amounts to about 3.7?Ä, and taking this long separation into account undulated chains running along [001] are formed with the water molecules residing in the pocket-like cavities. Upon heating the compound decomposes in one step starting at about 240°C. The final decomposition product was identified as ZnS and Sb 2S 3 by X-ray powder diffractometry. Additionally, spectroscopic data as well as synthetic procedures for [Zn( tren)] 2Sb 4S 8·0.75 H 2O are reported. [ABSTRACT FROM AUTHOR]

A hydrothermal approach employing an amine as reducing agent enables synthesis of an analogue of the arsenato(iii)-oxovanadate {V15As6}, representing the first systematic variation of this intensely studied magnetic system. [ABSTRACT FROM AUTHOR]

Enhanced particle removal processes in wet cleaning as well as drying processes of semiconductor wafers can cause significant lateral forces on surface structures. These forces, however, must not exceed the mechanical stability of structures on the wafer. Thus, a mechanical fracture test was used to assess the lateral mechanical stability of polysilicon line structures in relevant process liquids. The mechanical test was based on nanomanipulation with an atomic force microscope. Compared to fracture tests in air, data acquired in liquid isopropanol revealed a stabilizing effect. The differences in fracture forces can be attributed to a stress corrosion process on the surface. The size of the generated damage was influenced by the viscosity of the surrounding media. [ABSTRACT FROM AUTHOR]