Materials Literature
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Since the simulation of the fluid-solid transition in hard spheres (HS) [Alder andWainwright (1962)], there has been a long-standing question, with answers of progressively increasing complexity: what interactions, in addition to excluded volume, does it take to obtain more complex phases and phase transitions in atomi…
Pt supported on mesoporous silica SBA‐15 materials with various loadings are controllably synthesized by metal‐organic(MO)CVD of Pt(C5H9)2 in a Y‐tube reactor. The precursor, Pt(C5H9)2, is successfully prepared by the reaction of dichloro(1,5‐cyclooctadiene)platinum ((COD)PtCl2) with pent‐4‐en‐1‐ylmagnesium bromide, w…
Abstract Micropatterned ZnO was synthesized by an electroless deposition process using Au stripes as catalytic surfaces. The Au‐patterned electrodes were prepared on SiO2/Si wafers using photolithography. The site‐selective deposition of patterned ZnO hexagonal rod arrays is confirmed by scanning electron microscopy.…
Abstract This study is an evaluation of the effectiveness of the flexography printing process for manufacturing catalyst‐coated membranes (CCMs) for use in proton exchange membrane fuel cells (PEMFCs). Flexography is a maskless and continuous process that is used in large‐scale production with water‐based inks to redu…
In this study the microbial attack of Bacillus megaterium bacteria on mechanical properties of Al–Cu alloy has been investigated. The microstructural features and electrochemical behaviour of alloy samples immersed in controlled and inoculated medium under aerobic conditions were examined through scanning electron mic…
A tantalum tungsten (Ta-W) solid solution alloy, Ta 3% W, based 2D photonic crystal (PhC) was designed and fabricated for high-temperature energy conversion applications. Metallic PhCs are promising as high performance selective thermal emitters for solid-state thermal-to-electricity energy conversion concepts includi…
X-ray structural analysis is used for investigation of structures, obtained by self-organization from nanoparticles - lead sulfide (PbS) quantum dots (QDs) of different sizes - deposited on a glass substrate or embedded in a porous matrix. These nanostructures obtained by both methods represent ordered close-packed st…
Four compounds of composition [dienH2][Co(dien)2][Ge2S6] (dien = diethylenetriamine) were obtained under solvothermal conditions changing the reaction time and educt ratio in the reaction slurries. In three compounds the [Co(dien)2]2+ complexes adopt the s-fac and in one the u-fac configuration. The main differences b…
Concentration-dependent optical properties of lead sulfide (PbS) quantum dots (QDs) embedded into a porous matrix are investigated. A red shift of luminescence peak position depends on QD concentration and evidences for F¨orster resonant energy transfer (FRET) inside the quasi-monodispersed assemblies. PL decay curves…
We present DFB laser diodes emitting in the 76x nm wavelengths range and focus on design and fabrication of the integrated Bragg gratings. Grating functionality is obtained with a periodically patterned GaAs0.75P0.25 layer with a thickness of 13 nm. We applied scanning transmission electron microscopy using a high ang…
Spontaneous nonanastomotic transgraft hemorrhage occurring several years after grafting may be a new late complication of biological material-impregnated fabric vascular grafts (BMIFVs). Autologous connective tissue detachment may be caused by high porosity of the fabric graft and high blood pressure. Bleeding around…
The acid-base properties of some p-substituted aromatic hydrazones were examined in aqueous perchloric acid medim by spectrophotometric methods. The possible site where the proton may take place and the stability of the protonated form was discussed using the values of the total energy, binding energy, heat of formati…
Recent studies have shown that graphene paper (GP) is a promising candidate for novel applications in energy storage systems such as electrical batteries and supercapacitors. In this study, a low-cost and free-standing GP was produced by graphene oxide paper (GOP) in the thermal reduction method which heated GOP slowl…
A multi-stage temperature responsive wettable surface composed of poly(N-isopropylmethacrylamide)-block-poly(N-isopropylacrylamide)(PNIPMAM-b-PNIPAm) is fabricated on a structure-enhanced silicon substrate by atom transfer radical polymerization. Detailed AFM investigation indicates that the adhesion force on the prep…
The scarcity of fresh water, the depletion of fossil fuels, and the ever-increasing demand for electric power are important issues that receive increasing attention in a variety of branches of science and technology. In all three cases, nanoporous carbon electrodes, immersed in a liquid medium with charge carriers, ar…
An understanding of the effect of strain rate on the dynamic failure and mechanical properties of rock materials is important in the design of rock structures against missile impact or the penetration analysis of projectiles into rock mass. In this study, a pulse shape-controlled Split Hopkinson Pressure Bar system wa…
Abstract The undoped and Cd‐doped (0.4, 0.5 at.%) ZnO films deposited by radiofrequency magnetron sputtering have been irradiated by 167 MeV Xe26+ ions with energy to a fluence 3×1012 ions/cm2. The structure and vibrational properties of as‐grown and irradiated samples were studied using X‐ray diffraction and Raman sp…
Diesel micro-emulsions, which contain 10.4 wt% water, 4.95 wt% micro-emulsifiers, and 0.25 wt% n-amyl alcohol, were prepared by spontaneous emulsifying method and ultrasonic dispersing method. The effect of preparation methods on the stability and physicochemical properties of micro-emulsion are discussed in this arti…
The study is about the effect of H2 addition into N2 on the density of radiative species in the plasma and in the late afterglow of microwave flowing discharges at low gas pressure (2–10 torr). Intensities of radiative N2(B, C), N2+(B) neutral and ion molecules, H atoms and NH radicals were measured in the plasma and…
It has been studied the spectral characteristics of the porous silicon dioxide and cholesteric liquid crystal. It has been shown that doping of the EE1 cholesteric liquid crystal with Fe3O4 magnetite nanoparticles doesn’t shift significantly the position of the transmittance minimum of the material. It has been found…