Materials Literature
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The fuel cell system and fuel cell gas turbine hybrid system represent an emerging technology for power generation because of its higher energy conversion efficiency, extremely low environmental pollution, and potential use of some renewable energy sources as fuels. Depending upon the type and size of applications, fr…
Monometallic derivatives of tetrakis(1,2,5-thiadiazole)porphyrazine, [TTDPzH2], with main group tervalent metal ions having the formulae [TTDPzMX] (TTDPz = tetrakis(1,2,5-thiadiazole)porphyrazinato dianion; M = Al(III), X = Cl-, Br-, OH-; M = Ga(III), X = Cl-, OH-; M = In(III), X = AcO-) were prepared and investigated…
The superprotonic phase transition (phase II \ensuremath{\rightarrow} phase I; 414 K) of cesium hydrogen sulfate, $\mathrm{Cs}\mathrm{H}\mathrm{S}{\mathrm{O}}_{4}$, was simulated using molecular dynamics with the ``first principles'' MSXX force field (FF). The structure, binding energy, and vibrational frequencies of…
A one-dimensional (1D) subwavelength resonator utilizing a left-handed material (LHM) is first chosen as an example to show that for a reliable analysis, one should use the wave-field theory instead of the ray-trace theory. The resonant modes of a 2D subwavelength open resonator utilizing an LHM is calculated with wav…
Nd(3+)-based organic/inorganic hybrids have potential application in the field of integrated optics. Attractive sol-gel derived di-urea and di-urethane cross-linked poly(oxyethylene) (POE)/siloxane hybrids (di-ureasils and di-urethanesils, respectively) doped with neodymium triflate (Nd(CF(3)SO(3))(3)) were examined b…
We provide a new approach to describe the component segmental dynamics of miscible polymer blends combining the concept of chain connectivity, expressed in terms of the self-concentration, and the Adam-Gibbs model. The results show an excellent agreement between the prediction of our approach and the experimental data…
Even though different approaches have been developed to achieve various 1D assemblies of nanocrystals, few studies have been done on the assembly of crystallographically well-defined chalcogenide nanoclusters. Here, by using bifunctional organic ligands as the directional linker, a series of one-dimensional assemblies…
Abstract Reflectance anisotropy spectroscopy (RAS) is exquisitely sensitive to probe surfaces, with many potential applications in determining surface geometries or monitoring material growth. Thanks to recent computational and methodological progress it has now become possible to calculate surface optical spectra acc…
Abstract We have performed ab‐initio self‐consistent calculations using the full potential linear augmented plane wave method to investigate the structural and the electronic properties of the boron bismuth III–V compound BBi. Our calculations provide the first available information about the structural and electronic…
Charge-transfer salts of branched-alkyl biferrocenes, (1',1' ''-R2-1,1' '-biferrocene)[Ni(mnt)2] (1a, R = isopropyl; 2a, R = dineopentyl) and (1',1' ''-R2-1,1' '-biferrocene)2[Co(mnt)2]2 (1b, R = isopropyl; 2b, R = dineopentyl), were prepared. Their valence states were investigated using X-ray crystallography and Möss…
Interaction over a distance: Long-range antiferromagnetic interactions between distant copper(II) and silver(II) ions are observed only for triply and singly linked diporphyrins with at least one β–β bond, which underscores the critical importance of this direct bond for antiferromagnetic coupling. These results can b…
The converse electromechanical response in an organic Schottky contact follows a power law dependence S∝Vα of the mechanical strain S versus the applied voltage V, with an exponent α=1.5, in between linear piezoelectricity and quadratic electrostriction. The experimental result is discussed within the frame of a model…
Spin im Quadrat: Bei einem cyanidverbrückten molekularen Quadrat (siehe Bild) wurde ein thermisch induzierter zweistufiger Spin-Crossover beobachtet. Moleküle mit mehr als einem Spin-Crossover-Zentrum eignen sich als Baueinheiten für molekulare Schalter mit mehreren Zuständen.
Abstract Thermoluminescence (TL) characteristics and dosimetric properties of Ba 2 Ca(BO 3 ) 2 phosphor doped with Tb 3+ exposed to gamma‐ray irradiation are reported for the first time. Firstly, the influence of different rare earth dopants, i.e. Dy 3+ , Tb 3+ and Tm 3+ , on TL of Ba 2 Ca(BO 3 ) 2 phosphor is discuss…
The oxygen pressure dependence of magnetic anisotropy in pulse laser deposited manganese ferrite (MnFe2O4) films was investigated. Magnetic anisotropy fields (Ha) are shown to exceed 5kOe when films were processed at oxygen pressures below 5mTorr. Further, it is shown that the magnetically preferred direction of Ha ca…
We have synthesized, using the Gilch polymerization method, a new series of high-brightness, soluble copolymers (POSS-PPV- co -MEHPPV) of poly( p -phenylenevinylene) (PPV) containing side-chain-tethered polyhedral oligomeric silsesquioxane (POSS) pendent units and poly(2-methoxy-5-[2-ethylhexyloxy]-1,4-phenylenevinyle…
The photoinduced charge separation efficiency in porphyrin/TiO2 bilayers has been determined using the time-resolved microwave conductivity (TRMC) technique. Porphyrins investigated are unsubstituted meso-tetraphenylporphyrin (TPP) and meso-tetra(4-ethylphenyl)porphyrin (TEPP). TEPP/TiO2 bilayers exhibit a charge sepa…
Schon wenige isolierte Au3+-Ionen (0.02 pro nm2) auf einer ZrO2-Oberfläche genügen, um hohe katalytische Aktivitäten bei der selektiven Hydrierung von 1,3-Butadien zu erzielen. Katalytischer Umsatz und massebezogene Aktivität von metallischen Goldnanopartikeln werden um eine bzw. zwei Größenordnungen übertroffen. Zur…
The effect on solar cell performance of planar converters containing quantum dots (QDs) as wavelength-shifting entities on top of multicrystalline silicon cells was investigated by means of model studies with varying incident spectra. These included global, direct, and diffuse spectra with Air Mass (AM) values ranging…
The major ampullate fiber of both Nephila clavipes and Argiope aurantia is composed of two different proteins, MaSp1 and MaSp2. Each of these proteins has a highly conserved pattern of silk-associated amino acid motifs. The GPGXX motif is the only source of proline and is unique to MaSp2. On the basis of the percent o…