Materials Literature
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A method to prepare hierarchical porous gold monoliths was developed. Cast hollow Au/Ag spheres, templated by polystyrene beads, were dealloyed to prepare hollow nanoporous shells, and robust gold monoliths with 2% relative density were readily achieved.
One-step synthesis of carbon-encapsulated Fe(3)O(4) core/shell composites is reported. The Fe(3)O(4) cores were formed via the reduction of Fe(3+) by glucose under alkaline conditions obtained by the decomposition of urea. The amorphous carbon shells were carbonized from glucose. A possible formation mechanism for the…
Density-controlled ZnO nanorod arrays (ZNAs) were prepared on pre-treatment substrates by a hydrothermal approach under different conditions. The effect of substrate pre-treatment conditions on controlling the density of ZNAs was systematically studied by scanning electron microscopy and x-ray diffraction. It is demon…
An introduction to the physics of heavy fermion compounds is presented, attempting to highlight the conceptual developments and emphasize the mysteries and open questions that persist in this active field of research.
A novel class of organometallic polymers comprising N-heterocyclic carbenes and transition metals was shown to have potential as an electrically conductive, self-healing material. These polymers were found to exhibit conductivities of the order of 10(-3) S cm-1 and showed structurally dynamic characteristics in the so…
Alternated deposition of polyanions and polycations on a charged solid substrate leads to the buildup of polyelectrolyte multilayer (PEM) films. Two types of PEM films were reported in the literature: films whose thickness increases linearly and films whose thickness increases exponentially with the number of depositi…
The reactions of manganese(III) porphyrin complexes with terminal oxidants, such as m-chloroperbenzoic acid, iodosylarenes, and H(2)O(2), produced high-valent manganese(V)-oxo porphyrins in the presence of base in organic solvents at room temperature. The manganese(V)-oxo porphyrins have been characterized with variou…
$\mathrm{Bi}\mathrm{Fe}{\mathrm{O}}_{3}$ ceramics were investigated by means of infrared reflectivity and time domain terahertz transmission spectroscopy at temperatures $20--950\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, and the magnetodielectric effect was studied at $10--300\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ with t…
Hierarchically roughened nonwoven fabrics that exhibit superhydrophobic behavior (see figure) are obtained by decorating electrospun fibers (diameter ca. 1 μm) with pores or particles of a diameter of ca. 100 nm, followed by surface hydrophobization. The enhanced hydrophobicity, due to a second level of roughness orig…
We suggest a way of confining quasiparticles by an external potential in a small region of a graphene strip. Transversal electron motion plays a crucial role in this confinement. Properties of thus obtained graphene quantum dots are investigated theoretically for different types of the boundary conditions at the edges…
Superhydrophobicity is obtained on photolithographically structured silicon surfaces consisting of flat-top pillars after a perfluorosilanization treatment. Systematic static contact angle measurements were carried out on these surfaces as a function of pillar parameters that geometrically determine the surface roughn…
Abstract The new quaternary oxide Ag 4 CuTeO 6 has been obtained by solid state reaction starting from stoichiometric amounts of the binary oxides at elevated temperatures and oxygen pressures. Ag 4 CuTeO 6 crystallises in space group C 2/ c with a = 11.3021(8), b = 9.6875(6), c = 5.7082(5) Å, β = 99.301(7)°, V = 616.…
Abstract The Reaction Behaviour of the Polycylic Oligoalumosiloxane [Ph 2 SiO] 8 [AlO(OH)] 4 towards Hexamethyldisilazane The reaction of the oligoalumosiloxane [Ph 2 SiO] 8 [AlO(OH)] 4 ( 1 ) with hexamethyldisilazane leads to the triple ionic [Ph 2 SiO] 8 [AlO 2 ] 2 [AlO(O‐SiMe 3 )] 2 [NH 4 ·THF] 2 ·2 THF ( 2 ) and i…
Abstract Synthesis and Structure of the Basic Alkaline Earth Nitrates Sr 2 (OH) 3 NO 3 and Ba 2 (OH) 3 NO 3 Sr 2 (OH) 3 NO 3 and Ba 2 (OH) 3 NO 3 were synthesized from mixtures of freshly prepared strontium or barium hydroxides and their corresponding nitrates in evacuated quartz glass ampoules at 420 °C and 360 °C, r…
Abstract A novel process consisting of a pulsed streamer discharge over Ni/HZSM‐5 catalysts for an oxygen‐free conversion of methane to aromatics is reported here. This plasma‐over‐catalyst process shows a significant synergetic effect on promoting methane conversion to aromatic products and high stability. Using this…
Abstract A novel poly( p ‐phenylene) ( 6 ) has been synthesized by a cruciform combination of a polyphenylene backbone with 2,2′‐( p ‐phenylene)‐bis(4,5‐diphenylimidazole) ( 5 ) as an additional, orthogonal chromophore. Polymer 6 showed in solution and in the solid state, a blue‐green emission, which is obviously aris…
Abstract Powder samples of the ternary phosphates A 3 Lu(PO 4 ) 2 :Yb 3+ (A = Na, Rb) have been synthesised by solid state reactions. The spectroscopic properties of Yb 3+ in double phosphate host lattices were investigated using absorption, emission and excitation spectra at 4, 10 and 293 K in the VUV to IR range. Th…
The determination of optical constants from spectra of low-symmetry single crystals or from spectra stemming from unfavorable crystal faces by dispersion analysis is a difficult task. Besides oscillator frequencies, band positions can additionally depend on oscillator strength as well as on the relative orientation of…
Abstract Hybrid organic–inorganic films were prepared using four different hydroxylated soybean oils (HSO) or epoxidized soybean oil as organic precursor and tetraethyl orthosilicate (TEOS) as inorganic precursor in a mass ratio of HSO:TEOS of 90:10. The films were macroscopically homogeneous and were characterized by…
Abstract Micron‐sized CaCO 3 particles free of milling additives were coated with a monolayer of aliphatic carboxylic acids of different chain length (C2, C4, C5, C10, and C18). CaCO 3 was compounded with LDPE at different loading, and the tensile properties of the composites were measured and correlated to the length…