Materials Literature
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The difficulties involved in trying to use hospital or clinical radiographic installations, equipment, and personnel for forensic investigation have already been mentioned in Chapter 33. Attempts to use mobile x-ray equipment temporarily “borrowed” from the clinical facility will meet with similar problems of accessib…
The reflectance spectra of LaNiO3 film on silicon have been investigated in the wavelength range of 190–2650 nm (0.47–6.5 eV) under different external direct-current voltage. The Drude–Lorentz dispersion model is used to extract the optical function. The O 2p to Ni 3d electronic transition can be uniquely assigned to…
Optically active azobenzene polyurethane (OAAPU) containing donor-Π-acceptor azo group and asymmetric center was obtained from chromophore NABZ, chiral reagent L(-)-tartaric acid and toluene diisocyanate (TDI). The chemical structure and the thermal property were characterized by UV-Vis spectroscopy, FT-IR, 1H NMR and…
We report on the structural and electrical properties of Mn-doped ZnO/Al(2)O(3) nanostructures produced by the pulsed laser deposition technique. Grazing incidence small angle x-ray scattering (GISAXS) and Rutherford backscattering spectrometry revealed the multilayered structure in as-deposited samples. Annealing of…
Abstract Metamaterial of twisted metallic foil pairs is proposed. Resonances are illustrated in both transmission and reflection. Negative refraction index can be realized by chiral configuration of this metamaterial. Parallel and antiparallel surface currents form magnetic and electric dipoles. The cross coupling bet…
Amorphous carbon (a-C) film/n-Si heterojunctions have been fabricated by pulse laser deposition, and their current-voltage characteristics have been investigated. The results show that the atmosphere relative humidity (RH) has a significant effect on the reverse bias I-V characteristics of the heterojunctions. For the…
Dendritic and octahedral single-crystal magnetites have been successfully fabricated by a facile one-pot hydrothermal method without any templates. The presented materials were characterized by powder X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), s…
Au contacts were fabricated on Mg 0.27 Zn 0.73 O thin films that had been annealed by different processes. For the as-grown and vacuum annealed thin films, the Au/MgZnO contacts show ohmic behavior. For the thin film annealed in vacuum followed by in air, the contact shows current−voltage curve with Schottky character…
Hydrogen storage capacity of a carbon nanotube (CNT) sample is investigated using Elastic Recoil Detection Analysis (ERDA) at constant hydrogen uptake pressure of 5 bar and different adsorption temperatures within 30°C–500°C. The results of hydrogen concentration versus temperature revealed three distinct temperature…
We report the formation of ZnO/SiO2 nanocomposite thin films. They are composed of 5 nm sized-wurtzite ZnO nanoparticles nucleated within vitreous SiO2 which was in the form of either an ordered mesoporous or a dense matrix. Mesoporous thin films were obtained by evaporation induced self-assembly from the chemical sol…
Abstract The consequences of the interfacial mobility on the coalescence process in immiscible polymer blends was studied. Blends of PIB and PDMS with 10 vol.% PIB were subjected to shear‐flow step‐down experiments under controlled conditions. The blend was initially sheared at high shear rate to obtain a fine dispers…
Abstract We report the properties of a trinuclear cyanido‐bridged complex, trans ‐(dmap) 4 Ru II (µ‐NC)Os III (CN) 5 2 4– [ 1 4– ; dmap = 4‐(dimethylamino)pyridine], whose structure and electronic and vibrational spectra present strong evidence of partial redox states for the three metal ions, an unprecedented feature…
Abstract Dense proton‐conducting BaZr 0.1 Ce 0.7 Y 0.2 O 3 – δ (BZCY) electrolyte membranes were successfully fabricated on NiO–BZCY anode substrates at a low temperature of 1,150 °C via a combined co‐press and co‐firing process. To fabricate full cells, the LaSr 3 Co 1.5 Fe 1.5 O 10 – δ –BZCY composite cathode layer…
We present a simple fluorescence imaging method for measuring the time-resolved concentration of a fluorescent molecule diffusing through an anodic alumina membrane with a pore diameter of 20 nm. From the concentration breakthrough curve, the molecular diffusivity of the fluorophore was extracted. The experimentally d…
This communication describes in situ synthesis of thiocyanato-functionalized organosilica nanocapsules by a sol-gel reaction using 3-thiocyanatopropyltriethoxysilane as a precursor. Moreover, the nanocapsules are photoresponsive and burst under light irradiation, resulting in release of the encapsulated drug or dye.
Geometrical models of textile structures are important to the design, manufacture and performance prediction of textile related products. The models existing in the textile literature do not take into account the variable deformation of the yarn cross-section along the yarn path and this seriously limits the accuracy…
Microencapsulated ammonium polyphosphate (VAPP) with poly(vinyl alcohol)- melamine-formaldehyde (VMF) shell was introduced in ethylene vinyl acetate copolymer (EVA) to improve its flame retardancy. Due to the presence of VMF shell, VAPP shows better compatibility, flame retardancy and water resistance compared with am…
Spatially resolved analyses, by energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy, allowed the quantification of exogenous Si contamination in a solid oxide fuel cell (SOFC) cathode after operation. The Si quantification, taking into account the endogenous Si impurity level, correlated well w…
Three new bicomponent hydrogels of riboflavin (R) with salicylic acid (S), dihydroxybenzoic acid (B) and acetoguanamine (D) in 1:1 molar ratio have been reported. FTIR and UV-vis spectra suggest formation of H-bonded complexes in 1:1 molar ratio of the components. The network consists of tape, bar and helical tubes fo…
The mechanisms of texture development were examined for BaTiO3 and a (K,Na,Li)(Nb,Ta)O3 solid solution made by the templated grain growth method, and compared with the mechanism in Bi0.5(Na,K)0.5TiO3. The dominant mechanism was different in each material; grain boundary migration in BaTiO3, solid state spreading in Bi…