Materials Literature
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In this overview paper, we present low-temperature electronic transport measurements of carbon nanotube quantum dots with a back gate. In a semiconducting tube, charge carriers could be completely depleted. The addition energy and the excitation spectrum have been studied as a function of the number of charges (electr…
Single crystals of two new cobaltites, Ba2Co9O14 and Ba3Co10O17, were obtained from the flux of K2CO3 in the temperature range 800-890 degrees C. They crystallize in an intergrowth structure containing perovskite block and CdI2-type layers and can be attributed to the n = 1 and 2 members in a new intergrowth series of…
Dotierte Drähte: Die Organisation der π-Einheiten von amidfunktionalisiertem Tetrathiafulvalen in einem Gel durch Wasserstoffbrücken führt zur Bildung von Nanofasern. Dotieren mit Iod erzeugt ein leitfähiges Material, das durch Tempern in Nanodrähte mit metallartiger Leitfähigkeit übergeht (siehe Rasterkraftmikroskopi…
The growth of a novel organometallic nonlinear optical (NLO) crystal of thiourea complex bis(thiourea) cadmium formate (BTCF) in larger size is reported for the first time by the slow evaporation method. The grown crystal was subjected to single-crystal X-ray diffraction, morphology, optical transmission, Fourier tran…
Biomineralized structures are often used as indicators of environmental conditions in which they have grown. This study investigates the distribution of two trace elements, Mg and Na, commonly used in these environmental proxies, in the eggshells of seven different avian species to investigate the behavior of these el…
Magnetic susceptibility measurements on conducting polyaniline and polypyrrole nanostructures with different dopant type and doping level as functions of temperature and magnetic field are reported. The susceptibility data cannot be simply described as Curie-like susceptibility at lower temperatures and temperature-in…
Abstract We present a novel approach to numerical modelling of the crystalline solid as a heat bath. The approach allows bringing together a small and a large crystalline domain, and model accurately the resultant interface, using harmonic assumptions for the larger domain, which is excluded from the explicit model an…
${\mathrm{Zn}}_{4}{\mathrm{Sb}}_{3}$ undergoes a phase transition from $\ensuremath{\alpha}$ to $\ensuremath{\beta}$ phase at ${T}_{1}\ensuremath{\approx}250\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The high temperature $\ensuremath{\beta}\text{\ensuremath{-}}{\mathrm{Zn}}_{4}{\mathrm{Sb}}_{3}$ phase has been widely inv…
The synthesis, structures, and optical and electrochemical properties of meso-phosphorylporphyrins are described. The copper-catalyzed carbon-phosphorus cross-coupling reaction of a meso-iodoporphyrin with di-n-butyl phosphite and diphenylphosphane oxide has proved to be an efficient and general method for the synthes…
The complexes [Ru(tpy)(bpy)(dmso)](OSO(2)CF(3))(2) and trans-[Ru(tpy)(pic)(dmso)](PF(6)) (tpy is 2,2':6',2' '-terpyridine, bpy is 2,2'-bipyridine, pic is 2-pyridinecarboxylate, and dmso is dimethyl sulfoxide) were investigated by picosecond transient absorption spectroscopy in order to monitor excited-state intramolec…
A great value is nowadays being given to light-weight structures and durable light-weight materials and composites. In this respect, fiber reinforced plastics (FRP) are given more importance and are becoming one of the most distinguishing material categories next to metals. This research provides some results of mecha…
Studies on heteroepitaxy of polymers mostly dealt with the resulting mutual orientation relationship of the involving polymer pairs. The molecular dynamics during the expitaxial crystallization process of a polymer was, however, not concerned so far. To disclose the expitaxial crystallization process of polymers on a…
The temperature dependence of the electronic structure of the quasi-two-dimensional material $1T\text{\ensuremath{-}}\mathrm{Ta}{\mathrm{S}}_{2}$ is revisited by considering angle-resolved photoemission spectroscopy (ARPES) and density functional theory to calculate the imaginary part of the static electronic suscepti…
For the first time, we describe a simple, room-temperature surfactant-mediated route to inorganic mesocrystals of NH(4)TiOF(3) and their remarkable topotaxial conversion by washing or annealing to TiO(2) as anatase mesocrystals.
The metal ion-complexing properties of 1,10-phenanthroline-2,9-dicarboxylic acid (PDA) are reported. The protonation constants (pK1 = 4.75, pK2 = 2.53) and formation constants (log K(1)) for PDA with Mg(II) (3.53), Ca(II) (7.3), Sr(II) (5.61), Ba(II) (5.43), La(III) (13.5), Gd(III) (16.1), Zn(II) (11.0), Cd(II) (12.8)…
An improved method for the determination of deuterium-to-hydrogen (D/H) ratios of non-exchangeable hydrogen in cellulose is presented. The method is based on the equilibration reaction of the hydroxyl hydrogen of cellulose and water vapour of known isotopic composition. The equilibrated cellulose is pyrolysed and the…
Poly(methyl methacrylate) (PMMA)/carbon black (CB) composites were fabricated using two different mixing methods: (1) mechanical mixing and (2) solution mixing of the precursors, followed by compression molding. The microstructures obtained were examined by optical and scanning electron microscopy. Electrical properti…
Luftdicht verschlossen: In einem Ni9W6-High-Spin-Cluster (S=12) mit Cyanidbrücken sind die NiII- (grün) und WV-Ionen (violett) ferromagnetisch gekoppelt. Die Substitution der Solvensmoleküle an der Clusteroberfläche gegen 2,2′-Bipyridin ergab einen luftstabilen Ni9W6-Einzelmolekülmagnet.
To cap it off: A high-spin cyanide-bridged Ni9W6 cluster (S=12) shows ferromagnetic coupling between NiII (green) and WV (purple) ions within the molecule. The surface was modified by substituting the solvent molecules on the surface of the cluster with 2,2′-bipyridine to afford an air-stable Ni9W6 cluster with single…
We performed a global-minimum search for low-lying neutral clusters (Au(n)) in the size range of n=15-19 by means of basin-hopping method coupled with density functional theory calculation. Leading candidates for the lowest-energy clusters are identified, including four for Au(15), two for Au(16), three for Au(17), fi…