Materials Literature
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Gadolinium (Gd)-based contrast media were introduced as alternatives to iodinated media for magnetic resonance imaging (MRI). Although originally thought to be non-nephrotoxic, Gd-based contrast media have recently been reported to be associated with acute kidney injury. The underlying mechanism of Gd-induced renal in…
The plasmon frequencies of a general core/double-shell structure are studied by plasmon hybridization method, and three distinct plasmon modes (ω0, ω+, and ω−) are found, in which the value of ω0 is always stable, and ω+ as well as ω− is variable with the radius ratios. The influences of dielectric effect and permitti…
The application of thin films as coating on several surfaces has been one of the major factors responsible for technological advances. Additive Manufacturing is used to define a set of technologies that have the building of 3D physic prototypes as a common characteristic. In this work we have studied the properties of…
We have studied the luminescence spectra of Li2Sr1 − x Eu x SiO4 (x = 0.0001–0.01) solid solutions prepared by solid-state reactions and a sol-gel process in a reducing atmosphere. The spectra show a broad band in the range 500–700 nm, centered at 578 nm, which is due to the 4f 65d → 4f 7 transition. The luminescence…
La2O3-CeO2 nanopowders with different La2O3 (0-20 mol%) were prepared by the sol-gel method. The modification of the cubic structure of ceria by substituting La3+ for Ce4+ into the lattice of CeO2 has been investigated. The crystal structure of La2O3-CeO2 nanomaterials has been examined by X-ray powder diffraction and…
The relationship between magnetic property and phase change features in Fe-doped Ge-Sb-Te has been studied. Fe-doped Ge-Sb-Te is a phase change magnetic material, which exhibits a fast phase change feature and different magnetic, optical and electrical properties between amorphous and crystalline states. However, the…
We report fabrication of aligned array carbon nanotube (CNT) electrodes for organic electronic device applications. The ultra-high density aligned CNT array was assembled via dielectrophoresis (DEP) from a high quality surfactant free and stable aqueous CNT solution. The CNT source and drain electrodes were formed tho…
The effects of annealing parameters on crystallinity and surface morphology of RF sputtered zinc oxide nano films were investigated. The structure and morphology of the nano films were dependent on temperature, gas flow rate and time of annealing. The results from atomic force microscopy (AFM), field emission scanning…
We propose the use of polarization mapping as a tool to better separate the effects of plasmonic coupling from the local refractive index for molecular imaging and biosensing using gold nanoparticles. Polarization mapping allows identification of the orthogonal excitation mode when the particle dimer orientation is un…
Two new diatom species, Eunotia emedii and Eunotia kayaporum, are described from the Negro River hydrographical basin (Amazon), Brazil. Both species were found growing on submerged leaves in a ‘black water’ affluent characterized by low nutrient concentrations, absence of suspended matter, low pH and high concentratio…
Ghosts and flares are well-known problems that are caused by reflections from lens surfaces when we take photographs. It is more difficult to prevent such stray light in a digital camera than in a film camera because of high reflectance from the low-pass filter and diffraction from the image sensor. To prevent such st…
Self-assembled multilayers of lignosulfonates (LS) were built up on both quartz slides and cellulose fibers using a Cu2+-mediated layer-by-layer (LBL) technique. The growth of LS multilayers on quartz slides was monitored by UV-Vis spectroscopy, and the absorbance at 205 nm as well as at 280 nm was found to linearly i…
Abstract Summary: In this paper we investigate the influence of various nanofilllers' aspect ratio, chemical nature and organic modification on some selected polypropylene properties, such as crystallinity, thermal and mechanical resistance and fire behaviour. Materials were prepared by twin‐screw extrusion and charac…
The Droplet Epitaxy allows for the design and the realization of extremely complex semiconductor quantum ring structures, which range from single ring, multiple concentric quantum rings and coupled ring/disk structures. The fabrication and the characterization of such quantum ring complexes is here reviewed. Electroni…
We show, using ab initio density functional theory calculations, that Mn dimers adsorbed on graphene nanoribbons (Mn2/GNRs) present a magnetic bistability, as does the isolated Mn dimer. Our total energy results indicate that Mn dimers lying along the edge sites of zigzag GNRs represent the most likely configuration.…
The application of the microcellular co-extrusion method (Fig. 1) at specific parameters to obtain triple-layered coatings for single core electrical cables on the basis of PVC containing 0.1-1.0 % of a blowing agent has been presented. The changes observed in electrical energy consumption in the technological process…
This paper reports the design of a metamaterial absorber with direction-selective and polarisation-insensitive property. Both theoretical and simulated results reveal that the absorber has a distinct absorption point with direction selectivity at 7.48 GHz, which is related to the resonance of the metamaterial and is n…
GSAS instrument parameters are tabulated for a variety of laboratory and synchrotron diffractometers to give users an idea of the typical ranges of profile parameters when they generate their own instrument parameter files. For modern high-resolution laboratory diffractometers, the parameters fall in the ranges 0<…
In this work we have synthesized CdS nanocrystals with thermochemical method. CdSO4 and Na2S2O3 were used as the precursors and thioglycolic acid (TGA) was used as capping agent molecule. The structure and optical property of the nanocrystals were characterized by means of XRD, TEM, UV-visible optical spectroscopy and…
Abstract Summary: Nanocomposites containing multiwall carbon nanotubes (MWNT) were prepared by melt compounding with polypropylene and polyethylene. The samples were UV‐light irradiated in artificial accelerated conditions representative of solar irradiation (λ > 300 nm) at 60 °C in air. The chemical modifications…