Materials Literature
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The role of oxide substrate with respect to ${\text{O}}_{2}$ adsorption induced changes in the Raman spectra of individual metallic carbon nanotubes is examined. A chiral metallic nanotube suspended over a trench exhibits a relatively simple two-peak $G$-band feature with no observable $D$-band intensity. On the other…
Single-crystal CdTe nanorods with diameters of 50-100 nm were synthesized under a surfactant-assisted hydrothermal condition. The experimental results indicated that with a temporal dependence the morphologies of CdTe nanocrystallites changed from nanoparticles to smooth surface nanorods. The crystal structure, morpho…
Fehlende Spezies gefunden: Zwei Isopolyoxowolframat-Cluster mit neuartigen „S“-förmigen [H4W22O74]12−- bzw. „§“-förmigen [H10W34O116]18−-Geometrien werden vorgestellt. Diese komplexen Strukturen resultieren aus einer auf dem {W11}-Fragment basierenden Strukturentwicklung und bieten sich als neue Baueinheiten in der Is…
The Bragg peaks in x-ray diffraction experiments are generally taken to be a reliable measure of the average lattice distance in crystals. We show that this assumption can be misleading when determining hydrogen-induced volume changes. Experiments based on simultaneous determination of the position of the Bragg peak a…
Abstract Isotactic polypropylene (PP) has been reactively blended with various grades of an ethylene–octene copolymer (EOC) in a twin‐screw extruder. Free radical polymerization of styrene and a multifunctional acrylate during melt extrusion has resulted in an enhancement of mechanical properties over the binary blend…
We have directly grown single-walled carbon nanotubes on epitaxial BaTiO3 thin films, fabricating prototype carbon nanotube-ferroelectric devices. We demonstrate polarization switching using the nanotube as a local electric field source and compare the results to switching with an atomic force microscopy tip. The obse…
Nanostructured titanium dioxide (TiO(2)) porous films and nanotube arrays were prepared by atomic layer deposition (ALD) on porous anodic alumina (PAA) templates. The nanostructures were characterized by FESEM and XRD to investigate the structural and crystallographic characteristics. They were then evaluated as self-…
Intrinsic zinc oxide (i-ZnO) and aluminium-doped ZnO (ZnO:Al) are components of high-efficiency copper indium gallium diselenide solar cells. This paper examines both of these materials grown by two different techniques, namely radio frequency sputtering and electrodeposition (ED) for comparison and a better understan…
Abstract Multiphase polymer composites of carbon black (CB), polypropylene (PP) and low density polyethylene (LDPE) were prepared by melt‐mixing method to reduce the amount of CB in the conductive composites. SEM images showed that CB preferably located in LDPE phase and formed electrically conductive path. The measur…
An extensive study of the single-step replication of form-birefringent quarter-wave plates is presented. Using rigorous diffraction theory, the fabrication parameters and tolerances are carefully studied in order to obtain ideal conditions for successful replication. The design considerations are then applied to fabri…
Abstract A Hemoglobin‐CdTe‐CaCO 3 @polyelectrolyte 3D architecture is synthesized by a stepwise layer‐by‐layer method and is further used to fabricate an electrochemistry biosensor. While the calcium carbonate (CaCO 3 ) microsphere acts as an effective host for the loading of cadmium telluride (CdTe) quantum dots due…
Towards a nanostructured thermoelectric generator using ion-track lithography, Koukharenko, E, Li, X, Nandhakumar, I, Frety, N, Beeby, S P, Cox, D, Tudor, M J, Schiedt, B, Trautmann, C, Bertsch, A, White, N M
We employed transmission electron microscopy and Raman spectra to investigate the behavior of impurity carbon usually unintentionally introduced in N-doped ZnO by metal-organic chemical vapor deposition. Unintentional doped carbon may form graphite clusters along grain boundaries resulting in n-type domains and possib…
Abstract The new cis ‐dioxomolybdenum(VI) complexes [MoO 2 (salhyhb)] 2 ( 1 ), [MoO 2 (salhyhp)] ( 2 ), and [MoO 2 (salhyhh)(MeOH)] ( 3 ) with the hydrazone ligands H 2 salhyhb, Hsalhyhp, and H 2 salhyhh derived from salicylaldehyde and ω‐hydroxy carbonic acid hydrazides with different chain lengths, have been synthes…
The brownmillerite-type A 2B 2O 5 structure is considered as a parent one, giving rise to different derivatives: layered double perovskites, A-site and anion-vacancy-ordered perovskites, and the perovskite-like compounds with crystallographic shear planes. The structural relationships and synthesis pathways for these…
Face-centered cubic (fcc) Supra-crystals and disordered assemblies of Co nanocrystals have their time-dependent reflectivity compared using time-resolved confocal microscopy. The differential reflectivity exhibits a behavior strongly dependent on mesoscopic organization, an effect associated with the collective cohere…
The partitioning of iron among octahedrally coordinated sites in tourmaline, and its stereochemical consequences, were investigated in a Fe-rich dravite in a skarn rock from Utö, Sweden. A multianalytical approach using structure refinement (SREF), electron microprobe analysis (EMPA), and Mössbauer spectroscopy (MS) e…
The growth of Sb-doped p-type ZnO∕Ga-doped n-type ZnO homojunction on Si (100) substrate by molecular beam epitaxy led to closely packed vertical ZnO columns with lateral diameters ranging from 100to400nm. Mesa structures were defined and Ohmic contact of both n-type ZnO and p-type ZnO was realized with Au∕Ti and Au∕N…
This paper is concerned with the development of a high-precision 30-kW (40-hp) calorimeter and is specifically focused on how experimental errors resulting from calorimeter design and operating procedures are eliminated or mitigated. A complete calibration for the calorimetric system using a DC heater is conducted, an…
Abstract Amplified spontaneous emission (ASE) of a series of blue‐emitting poly(ladder‐type phenylene)s (LPPP)s has been studied in thin film polymer waveguide structures. The chemically well‐defined step‐ladder polymers consist of an increasing number of bridged phenylene rings per monomer unit starting from fully ar…