Materials Literature
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The paper proposes a new fragmentation mechanism of dendrite arms. The theoretical basis of this mechanism is a shift in the thermodynamical equilibrium at the solid-liquid interface due to the presence of elastic energy. This effect is modelled by the generalized Gibbs-Thomson condition [1], where each term is calcul…
The energetic ground state of gold clusters with up to 314 atoms consists of rather complicated geometries that have only a weak resemblance to the perfect icosahedra, decahedra and octahedra that are encountered for some magic numbers. The structure changes in most cases completely by the addition of a single atom. O…
The cuticle of mussel byssal threads is a robust natural coating that combines high extensibility with high stiffness and hardness. In this study, fluorescence microscopy and elemental analysis were exploited to show that the 3,4-dihydroxyphenyl-L-alanine (dopa) residues of mussel foot protein-1 colocalize with Fe and…
Quality and quantity: A non-injection synthesis of high-quality CdSe nanocrystals can be conducted in air, that is without the need for any oxygen-free manipulation. The synthesis, which uses SeO2 as the selenium precursor, is suitable for the large-scale industrial synthesis of high-quality nanocrystals at low cost a…
This paper reports a resonance energy transfer-amplifying fluorescence quenching at the surface of silica nanoparticles for the ultrasensitive detection of 2,4,6-trinitrotoluene (TNT) in solution and vapor environments. Fluorescence dye and organic amine were covalently modified onto the surface of silica nanoparticle…
Alkali- and alkaline-earth metal amidoboranes are a new class of compounds with rarely observed [NH2BH3](-) units. LiNH2BH3 and solvent-containing Ca(NH2BH3)2 x THF have been recently reported to significantly improve the dehydrogenation properties of ammonia borane. Therefore, metal amidoboranes, with accelerated des…
Not all that glitters…︁ The activity of supported gold nanoparticles depends on the method used for their preparation. Gold clusters of about 2 nm in diameter were deposited on nonreducible metal oxides and carbon materials by solid grinding of a volatile organogold complex in a ball mill and subsequent calcination (s…
The action behind contraction: The metal–organic framework [Cu3(btc)2] displays negative thermal expansion (NTE) over a broad temperature range. This property arises from two coincident mechanisms, each of which are unique for NTE systems: the concerted transverse vibration of triangular organic linkers, and the local…
We present magnetization, specific heat, and Hall coefficient measurements on high quality NaxCoO2 single crystals with x = 0.8 and 0.5. Similar to Na0.85CoO2, a metamagnetic transition at about 20 K with was observed in Na0.8CoO2 under a magnetic field of 9 T. This suggests that the common metamagnetic transition aro…
Abstract In situ forming biodegradable polymeric systems loaded with betamethasone (BTM) and betamethasone acetate (BTMA) were prepared using poly( DL ‐lactide‐ co ‐glycolide) (PLGA), ethyl heptanoate (EH), and N ‐methyl‐2‐pyrrolidone (NMP) as the biodegradable polymer, additive, and solvent, respectively. The drug re…
Demineralized Summit (DS) anthracite, DS annealed at 1673 K, and graphite are used to explore the effect of precursor order on structural transformations and H 2 evolution that result during reactive ball milling. Carbon structure was assessed before and after milling with temperature-programmed oxidation, X-ray diffr…
We present evidence for in-plane coupling in relaxor ${\text{PbMg}}_{1/3}{\text{Nb}}_{2/3}{\text{O}}_{3}$ / ferroelectric ${\text{PbTiO}}_{3}$ superlattices ${[{\text{PMN}}_{(1\ensuremath{-}x)\ensuremath{\Lambda}}/{\text{PT}}_{x\ensuremath{\Lambda}}]}_{10}$. For constant superlattice wavelength $\ensuremath{\Lambda}={…
Four new representatives of the natrochalcite structure type s.s. – A + Me 2+ 2 ( X 6+ O 4 ) 2 [(H 2 O)(OH)], monoclinic, space group C 2/ m , Z = 2 – with A + = Na or K, Me 2+ = Co or Ni, and X 6 + = S or Se, were structurally characterised in Part I of this study. These compounds feature an extraordinary hydrogen bo…
The domain-wall-induced reversal dynamics in compressively strained ${\text{Ga}}_{1\ensuremath{-}x}{\text{Mn}}_{x}\text{As}$ was studied employing the magneto-optical Kerr effect and Kerr microscopy. Due to the influence of a uniaxial part in the in-plane magnetic anisotropy $90\ifmmode^\circ\else\textdegree\fi{}\ifmm…
Abstract A novel tin‐coupled star‐shaped block copolymer (SB‐B) 4 Sn was synthesized by anionic polymeric techniques. This new copolymer exhibited two different types: One was star‐shaped polybutadiene‐ b ‐poly(butadiene‐ ran ‐styrene) ( S ‐PB‐PSB), and the other was star‐shaped polybutadiene‐ b ‐poly(butadiene‐ ran ‐…
Abstract An algorithm to elucidate the temporal bond polarizabilities from the surface enhanced Raman (SERS) intensities was employed to the case of methylviologen (MV) adsorbed on the Ag electrode. This enables us to obtain the properties of its SERS mechanisms and the effect of its adsorption. The analysis shows tha…
The objectives of this research were to investigate empirical and diffusion models for thin-layer crumb rubber drying for producing STR20 rubber using hot air temperatures of 110–130°C and to study the effect of drying parameters such as inlet drying temperature, volumetric flow rate, and initial moisture content on t…
The unsaturated cyclic [M3(dppm)3(CO)](2+) clusters (M = Pt, Pd; dppm = Ph2PCH2PPh2; such as PF6(-) salt) exhibit a cavity formed by the six dppm-phenyl groups placed like a picket fence above the unsaturated triangular M3 dicationic center. Electrostatic interactions of the M(3+) units inside this cavity with the car…
The angular dependence of the optical phonons of high-quality bulk ZnO has been systematically studied by means of Raman scattering. We report the observation of quasi-TO and quasi-LO modes for propagation directions covering the whole a – c mixing plane using a beveled ZnO single crystal sample. Scattering experiment…
The relaxor behavior of lanthanum modified lead zirconate titanate (PLZT) ferroelectric ceramics, for a La/Zr/Ti ratio of x/60/40, has been analyzed.An approximation to the dynamical behavior of the polar nano-regions (PNRs) has been discussed, taking into account a relaxation model, which considers a distribution fun…