Materials Literature
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We report on the inhibition of WO3 crystallization by the addition of Ti observed in sputter-deposited W0.95Ti0.05O3 films. The effect of growth-temperature on the crystallization indicates that the W0.95Ti0.05O3 films grown at temperatures <300 °C are amorphous compared to WO3 crystalline films at 100–200 °C.…
Schwer auf Draht: Eine einfache Kolloidmethode ermöglicht die kontrollierte Bildung ultradünner einkristalliner ZnS-Nanodrähte mit „magischen“ Durchmessern bis hinab zu 1.2 nm (siehe HR-TEM-Bild). Die ultradünnen Nanodrähte könnten in Sensoren, Photodetektoren und als Matrixmaterialien für verdünnte magnetische Halble…
The KLL Auger electron spectrum of free silicon atoms has been recorded using electron impact ionization. Besides normal KLL Auger lines, the spectrum shows a rich satellite structure. The KLL Auger transitions following a shake-off or a shake-up of the outermost electron during the K ionization are found to create th…
In this work we report on gelation properties, self-assembly motifs, chirality effects and morphological characteristics of gels formed by chiral retro-dipeptidic gelators in the form of terminal diacids (1a-5a) and their dimethyl ester (1b-5b) and dicarboxamide (1c-5c) derivatives. Terminal free acid retro-dipeptides…
The geometrical structures, electronic and magnetic properties of pure and B-substituted titanium clusters are determined by employing the density functional theory with gradient correlation functional and spin-unrestricted all-electron treatment. The isomers with a B atom located on the surface are energetically favo…
We investigate the switching dynamics of multistable nematic liquid crystal devices. In particular, we identify a remarkably simple two-dimensional device which exploits hybrid alignment at the surfaces to yield a bistable response. We also consider a three-dimensional tristable nematic device with patterned anchoring…
We present a first-principles density-functional theory based study of the impact of pressure on the structural and elastic properties of bulk 3R– and 2H–CuAlO2. The ground state properties of 3R– and 2H–CuAlO2 are obtained, which are in good agreement with previous experimental and theoretical data. The analysis of e…
It is experimentally verified that a lens formed by tilted metallic wires enables the full reconstruction of the near-field, both in amplitude and phase. It is shown that since the electric field is measured at a significant electrical distance from the object under study the perturbation introduced by the measurement…
The incorporation of metal or metal carbide nanoparticles into carbon nanofibers modifies their properties and enlarges their field of application. The purpose of this work is to report a new non-catalytic and easy method to prepare organized metal carbide-carbon composite nanofibers on nanopatterned silicon substrate…
The synthesis and photophysical characterization of two sets of zinc porphyrin platinum acetylide complexes are reported. The two sets of molecules differ in the way the bridging phenyl-ethynyl unit is attached to the porphyrin ring. One set is attached via an ethynyl unit on the β position, while the other set is att…
The structure, vibrational modes, and phonon contribution to the dielectric function of the pyrochlore ${\text{Bi}}_{2}{\text{Ti}}_{2}{\text{O}}_{6}{\text{O}}^{\ensuremath{'}}$ were calculated using first-principles methods. Total-energy minimization calculations were performed for ${\text{Bi}}_{2}{\text{Ti}}_{2}{\tex…
Ordered ZnFe 2 O 4 nanotube arrays with the average outer diameter of 100 nm were prepared in porous anodic aluminum oxide template using an improved sol-gel approach. The morphology was studied by transmission electron and field emission scanning electron microscope. X-ray diffraction result shows that the nanotubes…
Durchlässige Medizin: Poröse antigenbeladene abbaubare Polyelektrolytmikrokügelchen werden auf einfache Weise hergestellt und zeichnen sich durch hohe Verkapselungseffizienzen und eine effiziente Internalisierung durch antigenpräsentierende Zellen aus. Mögliche Anwendungen dieser mehrlagigen Kapseln finden sich im Gen…
Abstract Conducting properties of several polymers after low‐energy ion irradiation were investigated. The enhancement of conductance induced by the ions is discussed in terms of graphitization. Field effect transistors (FET) on the graphitized polymer surfaces were studied. We found that the field effect mobility dep…
Einzelmolekül-Fluoreszenzsonde: Über die Bildung der stark fluoreszierenden 4-NHOH-Form eines 3,4-dinitrophenylsubstituierten Bor-Dipyrromethan-Farbstoff wird der Elektronentransfer an einzelnen TiO2-Partikeln untersucht (siehe Bild; B gelb, C grau, F grün, H weiß, O rot). Kinetische und optische Analysen der Fluoresz…
ZnO quantum dots (QDs) with diameter around 6 nm were grown by a catalyst-free metalorganic chemical vapor deposition method and applied as electron field emitters. The Ga doping resulted in a considerable improvement of the field emission properties. Macroscopic field emission measurements revealed that the Ga-doped…
We present higher order conductivity spectra ${\ensuremath{\sigma}}_{3}^{\ensuremath{'}}(\ensuremath{\nu})$ of different ion conducting glasses and glass ceramics, which were taken over broad frequency ranges and at different temperatures. The ${\ensuremath{\sigma}}_{3}^{\ensuremath{'}}(\ensuremath{\nu})$ spectra are…
The results of X-ray diffraction, scanning electron microscopy, and dielectric measurements performed for polycrystalline Ba(Ti1−x Zr x )O3 are presented. Data from these measurements show a change of the type of paraelectric–ferroelectric (PE–FE) phase transition (PT) from sharp PT (x < 0.10), through diffuse phase t…
We prepared a rod-like molecule, 4-[4-(7-hydroxyheptyloxy)phenyl]-1-(4-hexylphenyl)-2,3-difluorobenzene, and investigated its physical properties using polarized optical microscopy (POM), differential scanning calorimetry (DSC), and X-ray diffraction (XRD). The compound was found to exhibit nematic, smectic A, and sme…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation K. Mohan Kant, V. Esposito, N. Pryds; Enhanced conductivity in pulsed laser deposited Ce0.9Gd0.1O…