Materials Literature
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Abstract High‐pressure X‐ray diffraction studies of Co x Zn 1– x O ( x = 0, 0.05, 0.10) were carried out with a synchrotron radiation source. The crystal parameters for three samples under pressure were refined by the Rietveld method. The bulk moduli for Co x Zn 1– x O ( x = 0, 0.05, 0.10) were determined by Birch's e…
The structural and electronic properties of diamond (100) surface, with hydrogen and oxygen terminations, have been studied using density functional theory. The energy calculations indicate that a hydroxyl is the most stable structure on the oxygenation surface. The surface properties with different terminations have…
A detailed survey of the low energy isomer spectrum of (SiO(2))(N), N= 6-10, 13, 16 has been performed using interatomic potential based global optimisations refined via high-level density functional calculations. Within these spectra, including many isomers reported for the first time, structurally and energetically…
A third-generation silicon drift detector (SDD) in the form of a silicon multicathode detector (SMCD) was tested as an analytical x-ray spectrometer on a scanning electron microscope. Resolution, output count rate, and spectral quality were examined as a function of the detector peaking time from 8 micros to 250 ns an…
This is an updated review related to the identification and/or accumulation of organic and inorganic extractable substances from di(2-ethylhexyl) phthalate (DEHP)-plasticized polyvinyl chloride (PVC), polyolefin, and various other plastic materials. The review considers the identification of such extractables, their r…
Abstract The structural properties of CaWO 4 , SrWO 4 , BaWO 4 , PbWO 4 , and EuWO 4 scintillating crystals under pressure have been studied by X‐ray powder diffraction, X‐ray absorption near‐edge structure measurements, Raman spectroscopy, and ab initio density functional theory calculations. The results obtained fro…
The first complete infrared FTIR absorption spectra of carbonado diamond confirm the interstellar origin of this most enigmatic diamond. All previous attempts failed to measure the absorption of carbonado diamond in the most important IR range of 1000-1300 cm -1 (10.00-7.69 μm) because of silica inclusions. In our inv…
The results of two sets of experiments to measure the elastic–plastic behaviour of gold at the nanometre length scale are reported. One set of experiments was on free-standing nanoscale single crystals of gold, and the other was on free-standing nanoscale specimens of open-celled nanoporous gold. Both types of specime…
Gradient plasticity theories which are used to describe size effects require nonstandard boundary conditions. We believe that the role of these boundary conditions in combination with a moving elastic–plastic boundary has so far not been well understood. In order to clarify the conditions which are required at such an…
World's record: The first isolation and structural characterization of a homoleptic isocyanidemetalate dianion has been achieved with [Fe(CNXyl)4]2− (Xyl=2,6-dimethylphenyl; see structure, Fe red, N blue, C gray). Spectral and structural data indicate that metal-to-isocyanide back-bonding in this electron-rich species…
To develop a novel layered host material with the ability to encapsulate anionic substances, the intercalation of three cationic polyelectrolytes into synthetic sodium fluortetrasilisic mica (Na-TSM) was investigated. With polyethylenimine (PEI) and poly(allylamine hydrochloride) (PAH), the conformation of the interca…
A new Monte Carlo technique for the simulation of secondary electron (SE) and backscattered electron (BSE) of scanning electron microscopy (SEM) images for an inhomogeneous specimen with a complex geometric structure has been developed. The simulation is based on structure construction modeling with simple geometric s…
Von gleicher Herkunft: Eine neuartige Polymerisationsmethode (Zwillingspolymerisation) liefert organisch-anorganische Nanokomposite ausgehend von einem einzigen Monomer. Zum Beispiel ergibt Tetrafurfuryloxysilan sich durchdringende Netzwerke aus Polyfurfurylalkohol und SiO2 (siehe Bild). Durch Herauslösen der organisc…
This paper studies dislocation induced internal stresses as introduced in a strain gradient crystal plasticity approach. The need for a second-order crystal plasticity approach is motivated in the context of the analysis of free-standing metal films used in radio-frequency micro-electro-mechanical systems (RFMEMS). Th…
The nonaqueous preparation of nanocrystalline indium and zinc oxide involving the solvothermal reaction of metal acetylacetonates with acetonitrile is presented. The synthesis approach is characterized by a particularly moderate reaction temperature of 100 °C and by the use of an oxygen-free solvent. The oxygen for th…
By using controlled SPM manipulation, carbon nanotubes have been continuously bent into a series of increasing angles, and two distinct buckling modes corresponding to "abrupt" and "gradual" buckle formation were observed through recording the height increment at the bend site during the loading process. Molecular dyn…
Mn2+ has five unpaired d-electrons, a long electronic relaxation time, and labile water exchange, all of which make it an attractive candidate for contrast agent application in medical magnetic resonance imaging. In the quest for stable and nonlabile Mn2+ complexes, we explored a novel dimeric triazacyclononane-based…
Knowledge of the atomic-scale structure is an important prerequisite to understanding and predicting properties of materials. With bulk crystals it is routinely obtained by X-ray diffraction. With nanocrystals, however, traditional X-ray crystallography fails because of their substantially limited length of structural…
Silicon carbide nanostructures were synthesized by carbothermal reduction of carbon−silica (C−SiO 2 ) nanocomposites. C−SiO 2 nanocomposites with C/SiO 2 molar ratios of 1.90−4.21 were used in this study. Thermogravimetric analysis, nitrogen sorption, X-ray diffraction, scanning electron microscopy, transmission elect…
A new family of associating polymers based on four-arm, star-shaped poly(D,L-lactide) (PDLLA) containing peripheral complementary hydrogen-bonding sites is described. Hydroxy-terminated, four-arm, star-shaped PDLLAs of controlled molar mass were functionalized with complementary DNA base pairs, adenine (A) and thymine…