Materials Literature
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The ultraviolet (UV) photoconductance properties of a single hexagonal WO3 nanowire have been studied systematically. The conductance of WO3 nanowires is very sensitive to ultraviolet B light and a field-effect transistor (FET) nanodevice incorporating a single WO3 nanowire exhibits excellent sensitivity, reversibilit…
We report a method using in situ etching to decouple the axial from the radial nanowire growth pathway, independent of other growth parameters. Thereby a wide range of growth parameters can be explored to improve the nanowire properties without concern of tapering or excess structural defects formed during radial grow…
The present status of in-situ scanning transmission X-ray microscopy (STXM) is reviewed, with an emphasis on the abilities of the STXM technique in comparison with electron microscopy. The experimental aspects and interpretation of X-ray absorption spectroscopy (XAS) are briefly introduced and the experimental boundar…
Monolithic cathodes of optimized porosity prepared by sintering LiCoO2 powders provide high volume utilization and surprising stability under electrochemical cycling. Combined with a novel packaging approach, ultrahigh energy densities in small volumes are enabled. The microbatteries have volumes <6 mm3 and provide su…
Here, we report a novel, highly sensitive, selective and economical molecular beacon using graphene oxide as the "nanoquencher". This novel molecular beacon system contains a hairpin-structured fluorophore-labeled oligonucleotide and a graphene oxide sheet. The strong interaction between hairpin-structured oligonucleo…
Well-dispersed M@TiO2 (M = Ag, Pd, Au, Pt) nanocomposite particles with a diameter of 200–400 nm can be synthesized on a large scale by a clean photochemical route which does not require any additives using spherical rutile nanoparticles as a support. The sizes of Pt, Au, and Pd nanoparticles formed on the surface of…
Abstract Recent progress in direct laser writing of three‐dimensional (3D) polymer nanostructures for photonics is reviewed. This technology has reached a level of maturity at which it can be considered as the 3D analogue of planar electron‐beam lithography. Combined with atomic‐layer deposition and/or chemical‐vapor…
Abstract A promising route to increase the performance of hematite (α‐Fe2O3) photoelectrodes for solar hydrogen production through water‐splitting is to use an extremely thin layer of this visible light absorber on a nanostructured scaffold. However, the typically poor performance of ultrathin (ca. 20 nm) films of hem…
Abstract Co 2 ‐based Heusler compounds with 27.8 valence electrons exhibit an exceptional electronic structure that makes them interesting materials for the application in spintronics. Co 2 Cr 0.6 Fe 0.4 Al is the most prominent example of this particular family of compounds. In this article new materials of this clas…
Abstract PEDOT nanospheres with an average diameter of about 100 nm were chemically synthesized using APS as the oxidant in the presence of SDBS and Cu 2 O, respectively. It was found that Cu 2 O is crucial to forming uniform PEDOT nanospheres because only granular PEDOT was obtained in the absence of Cu 2 O. It is pr…
Pure and barium added strontium tartrate trihydrate single crystals were grown using silica gel by chemical reaction method at room temperature. The DC conductivity measurements were carried out on the crystals. The Arrhenius plots show that two types of conduction exists in these crystals-one at low temperature and t…
Numerical and symmetry based analysis of the electron-phonon coupling in graphene have been performed. Symmetry alone predicts the Kohn anomalies, their positions in the Brillouin zone and all quantum numbers of the Kohn modes and the vectors of the Kohn displacements. Dispersion of kink phonons is calculated and foun…
The sintering temperature dependence of varistor properties and aging behavior in ZnO–Pr 6 O 11 –CoO–Cr 2 O 3 –Al 2 O 3 –Y 2 O 3 ceramics were investigated at the sintering temperature of 1280°–1350°C. The sintered density was almost unaffected by the sintering temperature. The breakdown field decreased in the range o…
The focus of this paper is to explore the efficacy of screen printing to generate crystalline texture in bismuth titanate through the orientation of highly anisotropic seed crystals. Seed crystals were grown through a molten salt flux technique with aspect ratios of ∼100:1, mixed with equiaxed powder of the same compo…
Amphiphilic porphyrin derivatives have been synthesized and characterized by $^1H$ NMR and MALDI-TOF-MS. All porphyrin derivatives showed very high solubility to aqueous medium as well as hydrophobic organic solvent. The UV-vis absorption of the porphyrin derivatives showed significant broadness and decrease of maximu…
The 1 : 2 adducts of lanthanoid nitrate complexes with hexamethylenetetramine (hmta) have been synthesized and characterized by X-ray crystallography, IR spectroscopy, and bond valence calculations. The effect of lanthanoid contraction is observed. The lanthanoids create three isostructural groups: La–Nd (group I), Sm…
Anorganische Nanokomposite entstehen durch das Zusammenfügen kolloider Nanokristalle und den anschließenden Austausch der organischen Liganden gegen Vorstufen der anorganischen Matrixphase. Die getrennte Synthese und Verarbeitung der Nanokristall- und der Matrixphase ermöglicht eine vollständige Modularität der Zusamm…
Abstract The compatibilization efficiency of organically modified layered silicates (clay) was studied for immiscible high melt strength polypropylene/ethyl vinyl acetate (EVA) blends for the first time. The size of the dispersed EVA phase in the polypropylene matrix decreased with addition of small amounts of clay (c…
Abstract In recent times, a “crystalline” and flexible optical waveguide candidate with excellent heat‐resistance and dimensional stability are developed. For the practical use of this crystalline optical film in the near future, an accurate control of the solid‐state structure is indispensable because of the necessit…
In the present study the single crystal growth of the pure and doped organic nonlinear optical crystal, L-arginine phosphate is reported. The dopants used were urea and thiourea. The crystals were grown by slow evaporation technique. The presence of various functional groups in the grown crystal was confirmed by Fouri…