Materials Literature
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We report here the structural, surface morphology, mechanical, and current—voltage characteristics of Zn 1− x M x O ceramic samples with various x and M (0.00 ≤ x ≤ 0.20, M = Ni, Cu). It is found that the considered dopants do not influence the well-known peaks related to the wurtzite structure of ZnO ceramics, while…
PA66/nanoclay nanocomposites with flame retardant (dimelamine phosphate) and other supportive additives (ammonium pentaborate, zinc borate and potassium nitrate) were prepared by melt blending method using single screw extruder. The prepared nanocomposites were characterized by XRD and FTIR techniques. The thermal pro…
The rapid protein adsorption on a material surface causes blood coagulation, platelet activation, and complement system activation, which poses a risk for failure of cardiovascular devices. In this study, a chemically hydroxylated titanium surface was aminosilanized and covalently grafted with poly(ethylene glycol). T…
This paper reports on the results of density functional theory investigations of the band structure of the graphene/Al 2 O 3 (0001) interface as a possible element base of graphene field-effect transistors. The regularities of the changes in the band structure in the series graphene → 2D-Al 2 O 3 (0001) → 2D-graphene/…
This paper reports on direct thermal to electrical energy conversion by performing the Olsen cycle on 9.5/65/35 lead lanthanum zirconate titanate (PLZT). The Olsen cycle consists of two isothermal and two isoelectric field processes in the electric displacement versus electric field diagram. It was performed by altern…
Chromite anodes in LWO PC-SOFC: Chemically compatible LSCN/LWO symmetric cells show the high protonic conductivity and p-type electronic conductivity of LSCN in reducing atmospheres. This allows to avoid blending with other protonic or electronic materials and enlarges the surface area. An Rp of 2.68 Ω cm2 at 750 °C a…
Mass production of tyres and their subsequent storage after use is a serious environmental problem whose solution has been attempted in various ways. One of these is the mixture of old, used tyres (GTR) with various thermoplastic and thermostable polymers. These blends are made by modifying the pre-treatment to which…
The structures and thermal expansion properties of Lu 2− x Fe x Mo 3 O 12 have been investigated by X-ray diffraction (XRD). XRD patterns at room temperature indicate that compounds Lu 2− x Fe x Mo 3 O 12 with x ≤ 1.3 exhibit an orthorhombic structure with space group Pnca ; compounds with x = 1.5 and 1.7 have a monoc…
Water management is a critical issue in polymer electrolyte membrane fuel cells (PEMFCs), and it is normally achieved through the modification of surface wettability condition for the cell components. In this study, superhydrophobic surface-coating materials were developed and the gas flow channel surfaces were modifi…
Single crystals of cobalt ludwigite Co 3 O 2 BO 3 with diamagnetic substitution of Ga 3+ ions for a part of the cobalt ions have been grown by the flux method. A detailed investigation of the crystal structure and magnetic properties of the compound has been carried out. A preferred character of the occupation of none…
Biocompatibility and biomechanical stability are two of the main obstacles limiting the effectiveness of vascular scaffolds. To improve the biomechanical stability and biocompatibility of these scaffolds, we created a heparin-nanomodified acellular bovine jugular vein scaffold by alternating linkage of heparin and dih…
Graphene, because of its remarkable electronic and structural properties, has attracted considerable attention in both the scientific and technological communities. However, a major roadblock to the realization of graphene-based field-effect transistors is that large-area graphene behaves as a semimetal with zero band…
The effect of various high temperature heat treatments and cooling rates on the hardness of cast 60-NITINOL (60wt%Ni- 40wt%Ti) was studied. The hardness ranged from approximately 33 HRC for annealed specimens to 63 HRC for water quenched specimens. Aging did not have a further effect on the hardness of the heat-treate…
This paper presents a spectroscopic characterization of Gd(2)(WO(4))(3):Ln(3+) (Ln=Eu, Pr, Tb and Dy). The luminescence and luminescence kinetics were measured under pressures up to 250 kbar. It was found that pressure quenches the luminescence of Pr(3+) and Tb(3+), whereas the emission of Eu(3+) and Dy(3+) was stable…
The influence of various strains on the crystal and electronic structures of superconducting FeSe has been studied ab initio . We consider changes in the Fermi surface nesting with a vector Q = (0.5,0.5) × (2 π / a ) as crucial for rising superconductivity (SC) mediated by spin fluctuations (SF). Our results indicate…
In this paper a general procedure for the introduction of pyridone moiety was developed, using a Friedländer reaction, for post-modification of ready-made BODIPY core, from which three pyridone-fused BODIPYs 1, 2 and 3 were generated. This method is complementary to the classical method for obtaining aromatic ring-fus…
Urea-urethane elastomers from polyesterdiol, 4,4'-diphenylmethane diisocyanate (MDI) and dicyandiamide were examined. Their structure was analysed using atomic force microscopy, and the obtained images underwent quantitative analysis. FT-IR spectroscopic analyses were performed, and the phase separation degree was cal…
Abstract A multifunctional polymeric chain extender (Joncryl) was used in the melt processing of a neat polylactide and polylactide/clay nanocomposites. The effects of Joncryl on morphology, rheology, thermal and mechanical properties, barrier properties and biodegradability were investigated. Three Joncryl loadings (…
The limitation of spatial resolution in orientation imaging via electron backscattered diffraction analysis in the scanning electron microscope (SEM) makes it difficult to investigate the microstructure of nanocrystalline materials. The use of the recently developed transmission electron microscope (TEM) based product…
In recent years there have been numerous computational studies predicting the nature of cold-compressed graphite yielding a proverbial alphabet soup of carbon structures (e.g., bct-C4, K4-, M-, H-, R-, S-, T-, W- and Z-carbon). Although theoretical methods have improved, the inherent nature of graphite (i.e., low-Z) a…