Materials Literature
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A combined experimental and theoretical study of the energy loss of protons in fluorides is presented. The measurements were performed in fresh $\mathrm{Al}{\mathrm{F}}_{3}$ evaporated in situ on self-supported C foils, extending the low-energy range from 25 down to $0.7\phantom{\rule{0.3em}{0ex}}\mathrm{keV}$. The tr…
Abstract A novel ultraviolet (UV) absorber, 5,5′‐disulfide‐bis[2‐(2‐hydroxy‐3,5‐di‐ tert ‐butylphenyl)‐2Hbenzotriazole] (DSBHTBB) was synthesized. Its structure was characterized by FTIR, NMR, UV, FABMS, and elemental analysis. In comparison with the common commercial benzotriazole UV absorbers, the absorption maximum…
Intertube conductance of double-wall carbon nanotubes with impurities is numerically studied. Its length dependence for various impurities is scaled by a mean free path. The intertube conductance exhibits drastic linear increase with the tube length and takes a maximum around at the localization length. The maximum co…
We consider an off-lattice liquid crystal pair potential in strictly two dimensions. The potential is purely repulsive and short ranged. Nevertheless, by means of a single parameter in the potential, the system is shown to undergo a first-order phase transition. The transition is studied using mean-field density funct…
A novel switching property of conducting polymer nanowires is observed. The change in resistance was found to be more than three orders of magnitude (see figure) and the threshold voltage (current) can be tuned by playing with the diameter and/or temperature. The switching mechanism observed in this structurally disor…
We have reported previously that the calcium-depleted form of bovine alpha-lactalbumin (apo alpha-LA) interacts with hen egg-white lysozyme (LYS) to form spherical supramolecular structures. These supramolecular structures contain an equimolar ratio of the two proteins. We further explore here the organization of thes…
Pd over TiO 2 (sol−gel and Hombikat uv-100) slurries with and without binders have been deposited on square-channel cordierite honeycombs, and vibration, heat, and abrasion resistance of washcoated minimonoliths have been evaluated. Activity tests were carried out in a microreactor operated at differential conditions.…
Our recent theory for the glassy dynamics of fluids and suspensions of hard nonspherical objects is applied to several modestly anisotropic shapes. The role of bond length and aspect ratio is studied for diatomics, triatomics, and spherocylinders. As spherical symmetry is broken the ideal kinetic glass transition volu…
A new approach to the deposition of Mn12 single-molecule magnet monolayers on the functionalized Au(111) surface optimized for the investigation by means of scanning tunneling spectroscopy was developed. To demonstrate this method, the new Mn12 complex [Mn12O12(O2CC6H4F)16(EtOH)4].4.4CHCl3 was synthesized and characte…
Hybrid nanostructures of regioregular (RR) P3HT and colloidal CdSe nanocrystals (spheres and rods, see figure) have been prepared by directional epitaxial solidification. The hybrid nanostructured films involve the periodic alternation of crystalline P3HT lamellae separated by amorphous interlamellar zones harboring t…
A simple thermal vapor deposition technique to synthesize crystalline tungsten oxide nanorods in ambient condition is presented. Using a commercial thermal hot plate, a pure 99.9% tungsten foil is heated at 485 ± 5 °C under ambient conditions with a piece of 150 μm thick glass cover slide pressing on the tungsten foil…
The focus of this work is to study the refractive index in thin films of blue light-emitting poly(9,9-dioctylfluorene) (PFO) that contain extended rigid chains (β-phase). Using a post-deposition exposure to toluene vapour, β-phase chains were induced in glassy PFO films that had been spin coated from a range of soluti…
Keine Schaumschlägerei: Das CaII-Derivat Ca(NH2BH3)2 (siehe Bild; Ca grün, O rot, N blau, B gelb, C grau, H grüne Kreise) hat grundlegend andere thermische Eigenschaften als der Ammoniak-Boran-Komplex: Im Temperaturbeeich zwischen 100 und 170 °C setzt Ca(NH2BH3)2 Wasserstoff frei, ohne dass es zur Schaumentwicklung ko…
We have studied the temperature dependence of spectroscopic ellipsometry spectra of an electrically insulating, nearly stoichiometric $\mathrm{Y}\mathrm{Ti}{\mathrm{O}}_{3}$ single crystal with ferromagnetic Curie temperature ${T}_{C}=30\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The optical response exhibits a weak but n…
In this work, highly crystalline λ-MnO 2 nanodisks are synthesized via a simple microemulsion process by using polyvinylpyrrolidone (PVP) as a capping layer. Detailed information about the morphology, such as size, shape and crystallinity, was investigated by using x-ray diffraction, field emission scanning electron m…
We monitor the influence of the bond length alternation (BLA) modification on the static electronic polarizability and first hyperpolarizability of two polymethineimine oligomers. Four theoretical approaches are compared: HF, PBE0, LC-omegaPBE, and MP2. For the dodecamer, both HF and PBE0 are unable to foresee even th…
Novel multifunctional magnetic polycation drug carriers (MPDCs) were synthesized to provide simultaneous magnetically targeted cancer therapy and diagnosis via magnetic resonance imaging (MRI). The MPDCs consist of ultra-sensitive magnetic nanocrystals as MR probes and for magnetic targeting, and a chemotherapeutic ag…
ZnAl hydrotalcites containing increasing amounts of 9-anthracenecarboxylate anion (9AC) have been obtained via an anion-exchange procedure. In particular, intercalated and/or surface-exchanged samples were prepared to study the effect of the chromophore packing on their photophysical and photochemical behavior. Surfac…
Ammonium nitrate (AN) and ammonium sulfate (AS) are ubiquitous components of atmospheric aerosols. Thermodynamic models predict formation of pure (AN and AS) and double salts (3AN. AS and 2AN. AS) for the AN/AS system. Because of the high supersaturation at which a droplet crystallizes, metastable crystal formation is…
The catalytic adsorption of NO on activated carbon materials provides an appropriated alternative for the control of low-concentration emissions of this air pollutant. The surface complexes formed upon NO adsorption at 30 degrees C were studied by X-ray photoelectron spectroscopy (XPS) and temperature-programmed desor…