Materials Literature
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M2BiNbO7 (M = In and Ga) were synthesized by solid-state reaction method and their structural and photocatalytic properties were investigated. The results indicated that these compounds crystallize in the pyrochlore-type structure, cubic system with space group Fd-3m. In addition, the band gaps of In2BiNbO7 and Ga2BiN…
The third-order nonlinear optical susceptibility of indium tin oxide (ITO) thin films on glass substrates, χ(3)ITO, was determined in the near-IR spectral region using degenerate four wave mixing (DFWM) spectroscopy with 100fs laser pulses. A DFWM method for measuring thin films on thick substrates was refined for the…
Damage accumulation on both the Sr and Ti sublattices in strontium titanate (SrTiO3) has been investigated under 1.0MeV Au+ irradiation at 360 and 400K, close to the critical temperature for amorphization (∼370K). Under irradiation at 360K, the relative disorder on both sublattices follows a nonlinear dependence on io…
Natural rubber was reinforced using two hybrid biofibers namely sisal and oil palm. The stress relaxation characteristics of sisal/oil palm hybrid fiber reinforced natural rubber composites was analyzed with special reference to fiber loading and chemical modifications. It was seen that the rate of relaxation decrease…
Isotopically pure Ge74 nanocrystals were formed in a sapphire matrix by the ion beam synthesis method. In contrast to those embedded in amorphous silica, sapphire-embedded nanocrystals are clearly faceted and are preferentially oriented with respect to the crystalline matrix. In situ transmission electron microscopy o…
We report the structural and transport properties of RNiO 3 (R: Nd, Pr) thin films prepared by pulsed laser deposition over various substrates without high pressure annealing. An excimer laser KrF with wavelength of 248 nm was used for deposition. Various substrates such as single-crystal SrTiO 3 (100), LaAlO 3 (100)…
We have developed a novel class of gold multilayer, surface-enhanced Raman scattering (SERS) substrates that are capable of enhancing SERS signals by 15.3-fold over conventional gold film over nanostructure (GFON) SERS substrates, making them comparable in sensitivity to optimized silver film over nanostructure (SFON)…
The influence of fiber friction, top arm pressure and roller setting at various drafting stages (draw frame, speed frame and ring frame) on yarn properties was studied. The Box and Behnken factorial design was used to optimize these three factors for better yarn quality. In each case, the optimum conditions within the…
It is demonstrated that the third generation of a recently introduced quantum mechanical polarizable force field (QMPFF) successfully reproduces experimental data on binding energies of polycyclic aromatic hydrocarbons and fullerene ${\mathrm{C}}_{60}$ with graphite. The QMPFF also provides an accurate description of…
Abstract Summary: A tensile testing set‐up was developed for the determination of the elastic modulus, tensile strength, and failure strain of single regenerated cellulose fibres. Since the accuracy of strain measurement is crucial for the measured elastic modulus and failure strain, strain measurements were performed…
Microstructural and electrical characterizations of air plasma sprayed TiO2 coatings were carried out to investigate the details of deoxidation during the spray process and the changes following air annealing. The coatings were found to behave as an n-type semiconductor indicating the presence of oxygen vacancies. Dir…
We present the first results of our attempts to correlate yields of ionisation clusters in a gas model of DNA and corresponding double-strand break (DSB) yields in irradiated plasmids, using a simple statistical model of DNA lesion formation. Based on the same statistical model, we also provide a comparison of simulat…
Thermal reaction of N-confused porphyrin (NCP) with [RhCl(CO)2]2 caused unprecedented formation of tetranuclear rhodium complex Rh4(NCP)2(CO)4 having a gable-porphyrin-type structure, where two porphyrin pi systems were electronically connected by the rhodium cluster.
Polycrystalline iron oxide films were fabricated using the reactive sputtering method without substrate heating. Structure characterization indicates that the dominant phases in the films evolve from α-Fe to pure Fe 3 O 4 with the increasing O 2 flow rate. In polycrystalline Fe 3 O 4 films, disordered atoms exist at t…
Abstract Summary: Strong cellulose fibres, e.g. flax and hemp, are increasingly used for composites. Despite substantial advantages, the tensile strength of these fibres is limited due to their complex structure and the unavoidable imperfections of the cell wall, inherent from growth or induced by processing. Essentia…
Abstract Two main kinds of heterogeneities are pointed out in RDX particles in using optical microscopy with matching refractive index and scanning electron microscopy. These are HMX impurities and solvent inclusions.
Nanocrystalline zinc oxide powders were successfully prepared by Pechini method. The polymeric precursors were prepared using zinc acetate and a mixed solution of citric acid and ethylene glycol as a chelating agent and reaction medium respectively. The polymeric precursors were calcined at temperatures from 500 to 90…
A novel memory cell for phase-change memories (PCMs) that enables low-power operation has been developed. Power (i.e., current and voltage) for the cell is significantly reduced by inserting a very thin Ta2O5film between GeSbTe (GST) and a W plug. The Ta2O5interfacial layer works not only as a heat insulator enabling…
O interesse pelo desenvolvimento de nanocompósitos com matrizes poliméricas aumentou significativamente nos últimos anos, levando a uma grande quantidade de trabalhos publicados e de grupos de pesquisa e desenvolvimento interessados e trabalhando nesta importante área. Em geral, os materiais inorgânicos não apresentam…
Abstract Normal bands in SERS are bands of Raman‐active vibrations of adsorbates in the first layer, whose frequency is not shifted with respect to the condensed species. Here we show the experimental result, that the intensity of the N‐bands of C 2 H 4 on cold‐deposited copper films in ultrahigh vacuum scales with th…