Materials Literature
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The ability to construct mineralized shells, spicules, spines and skeletons is thought to be a key factor that fuelled the expansion of multicellular animal life during the early Cambrian. The genes and molecular mechanisms that control the process of biomineralization in disparate phyla are gradually being revealed,…
Abstract Zinc gallate is an important semiconductor for manifold applications, e.g. in field emission displays or as a photocatalyst for water splitting. In addition to these interesting properties, zinc gallate is also an excellent matrix material that can be furthermore tuned through the incorporation of guest catio…
The performance of double-hybrid density functionals for the computation of molecular magnetic coupling constants in the framework of a standard spin Hamiltonian is assessed. A variety of different ferromagnetically and antiferromagnetically spin-coupled test systems is considered. A significant and systematic improve…
Four coordination compounds of calcium and magnesium with tetrathiafulvalene (TTF) bicarboxylate ligand have been synthesized and characterized by single-crystal analysis. As well-studied bicarboxylate complexes, the carboxylate groups in this ligand coordinate to alkaline earth metal ions in multidentate modes formin…
The incommensurately modulated structure of the mineral natrite has been refined for the first time. Two single-crystal grains, Lv and Kh, from two different occurrences [Mt. Karnasurt, Lovozero massif (Lv), Kola peninsula, Russia, and the pegmatite of Mt. Koashva, Khibiny massif (Kh)], have been investigated at 293 a…
Entgegen der Intuition wurde kürzlich gezeigt, dass verbrückte Azobenzole bessere Photoschalter sind als entsprechende unverbrückte Azobenzole. Mechanistische Einblicke aus Ab-initio-Studien der nichtadiabatischen Moleküldynamik offenbaren, dass die Brücke die Phenylringe passend ausrichtet, dadurch die Quantenausbeut…
In this paper, we apply transformation-based optics to the derivation of a general class of transparent metamaterial slabs. By means of analytical and numerical full-wave studies, we explore their image-displacement/formation capabilities, and establish intriguing connections with configurations already known in the l…
Nanocrystalline PbTiO 3 (PTO) powders in a perovskite structure have been synthesized by the sol–gel process using lead acetate, glycerin, and titanium (IV) isopropoxide as precursors. PTO ceramics were obtained by sintering the powders at temperatures ranging from 600° to 1000°C. The structure and morphology of the c…
SAXS has been applied to structural determination in leather. The SAXS beamline at the Australian Synchrotron provides 6 orders of magnitude dynamic range, enabling a rich source of structural information from scattering patterns of leather sections. SAXS patterns were recorded for q from 0.004 to 0.223 A(-1). Collage…
We report on dispersions of fatty acid-lysine salts in aqueous solutions which are further used to produce foams. The alkyl chain length is varied from dodecyl to stearic. In aqueous solutions, the lysine salt of the dodecyl chain yields an isotropic solution, probably micelles, whereas for longer alkyl chains, vesicl…
Abstract A method of fabricating horizontally aligned ZnO nanowire (NW) arrays with full control over the width and length is demonstrated. A cross‐sectional view of the NWs by transmission electron microscopy shows a “mushroom‐like” structure. Novel monolithic multisegment superstructures are fabricated by making use…
It is shown that the magnetic moments of Sc atoms can be significantly enhanced by combining them with alkali atoms. We present results of first principles electronic structure calculations of ScNa(n) (1 < or = n < or = 12) clusters that indicate that a ScNa(12) cluster consisting of a Sc atom surrounded by 12 Na atom…
Fe-rich “oxydravite” and dravite from the Late Proterozoic ophiolitic mélange of the Arabo-Nubian Shield, located in Egypt and Saudi Arabia, were structurally and chemically characterized by using crystal structure refinement based on single-crystal X-ray diffraction data, electron microprobe analysis, and Mössbauer s…
We conducted a Mössbauer study of synthetic glasses with anorthite-diopside eutectic composition modified with either 5 or 1 wt% Fe 2 O 3 and variable amounts of silica. Glasses were synthesized in air in the temperature range 1400-1570 °C. Room-temperature Mössbauer spectra showed the presence of magnetically ordered…
PbO–Sb 2 O 3 –B 2 O 3 glasses mixed with different concentrations of Pr 2 O 3 (ranging from 0 to 0.6 mol%) were crystallized. The samples were characterized by X‐ray diffraction (XRD) and transmission electron microscopy techniques. The XRD studies have revealed the presence of Pb 5 Sb 2 O 8 , Pb 3 (SbO 4 ) 2 , PbB 4…
Understanding water interaction with diamond surfaces is fundamental for applications in tribology, device technology, and microelectronics operating in biological environments. In this paper, we provide a full microscopic description of the interaction of water with diamond (001) surfaces. We performed ab initio calc…
The crystal structures and optical properties of the novel (1R,2R)-(-)-1,2-diammoniumocyclohexane squarate trihydrate (1) and bis(hydrogen squarate) (2) were elucidated and reported. Physical methods, single crystal X-ray diffraction, UV-vis-NIR, polarized IR spectroscopy of oriented colloids, mass spectrometry, and t…
The decay behavior of CaAlSiN(3):Eu(2+) was monitored as a function of the detection wavelength on the Eu(2+) emission band for various Eu(2+) concentrations from 0.0005 to 0.05. The decay at the higher-energy side was faster and less linear than the lower-energy side decay for all Eu(2+) concentrations. This was due…
In the in vitro motility assay, actin filaments are propelled by surface-adsorbed myosin motors, or rather, myosin motor fragments such as heavy meromyosin (HMM). Recently, efforts have been made to develop actomyosin powered nanodevices on the basis of this assay but such developments are hampered by limited understa…
Radiation-induced synthesis of colloidal silver nanoparticles (Ag-NPs) using chitosan (CTS) as a stabiliser and free radical scavenger is feasible and satisfiable to green method. The conversion dose (Ag+ into Ag0) was determined by UV-Vis spectroscopy and Ag-NPs size was characterised by transmission electron microsc…