Materials Literature
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Efforts have been carried out in order to use microsilica to develop a forsterite bond rather than other types of binders in the basic refractory castables. According to the higher drying rate and sinterability of colloidal silica, it has been proposed in the recent years. In the present work, effects of replacement o…
Abstract In this work, binary and ternary nanocomposite systems based on nylon 6 with montmorillonite (MMT), polyhedral oligomeric silsesquioxane (POSS), and their combination were prepared using a melt‐compounding process. In the transmission electron microscope (TEM) images, the MMT was found to be generally well di…
The syntheses of 2,2'-bipyridin-5-ylmethyl-5-(1,2-dithiolan-3-yl)pentanoate (L1) and N-(2,2'-bipyridin-5-ylmethyl)-5-(1,2-dithiolan-3-yl)pentanamide (L2) and their neutral fac carbonylrhenium(I) complexes [Re(L1)(CO)(3)Br] and [Re(L2)(CO)(3)Br] are reported. The electronic absorption and emission spectra of the comple…
Copper sulfide dendrites and subsequent uniform nanowires up to tens of micrometers long can be grown on carbon-coated transmission electron microscopy (TEM) Cu grids from elemental sulfur at room temperature under ambient conditions without any solvent and surfactants. TEM and high-resolution TEM studies demonstrated…
In the fiber-reinforced composites industry together with the promotion of environmental friendly production, synthetic materials are attempted to be replaced by renewable, biodegradable and recyclable materials. The most important challenge is to improve strength and durability of these materials. Matrix that support…
Lead-free potassium sodium niobate (K0.5Na0.5)NbO3 (KNN) has been prepared via conventional ceramic processing method. The influence of 0.5 wt% - 1.5 wt% MnO2 and WO3 addition on the sintering, crystallographic structure, microstructure and dielectric properties of KNN has been investigated. Optimal sintering temperat…
In carbon nanotubes, the most abundant defects, caused for example by irradiation or chemisorption treatments, are small perturbing clusters, i.e., bi-site defects, extending over both A and B sites. The relative positions of these perturbing clusters play a crucial role in determining the electronic properties of car…
We theoretically investigate the physical properties of the photoexcited states in the charge-ordered states in α-(BEDT-TTF) 2 I 3 and θ-(BEDT-TTF) 2 RbZn(SCN) 4 . We adopt the 1/4-filled extended Hubbard Hamiltonian for holes on the two-dimensional anisotropic triangular lattice. The photoexcited states are numerical…
The one-dimensional organic charge-transfer complex potassium–tetracyanoquinodimethane shows negative differential resistance and a switching behavior between high- and low-resistance states. By controlling this switching behavior through the use of external circuit components, we achieved current oscillation at room…
An electrochemical actuator demands that it should act as a sensor of the working conditions for its efficient application in devices. Actuation and sensing characteristics of a biopolymer/conducting polymer hybrid microfiber artificial muscle fabricated through wet spinning of a chitosan solution followed by in situ…
Tests were carried out on more than 14 different samples of fire protective coatings in order to investigate a relation between the thickness of the intumescent fire protection coating and the time of exposure to heat. A number of coatings of different chemical composition enabled to determine the fire resistance beha…
Slippage resistance of yarns at a seam in woven fabrics is a very important factor and very strict claims are raised for this property. It is necessary to know how fabric structure influences on seam slippage quality before manufacturing the fabric. The purpose of this work was to establish which of the weave factor i…
The electronic structure of (001)-(1×1) oxidised surface and inner core of germanium nanocrystals (1.5–2.3 nm in diameter) is studied separately using the self-consistent Hartree–Fock method coupled with the large unit cell (LUC) method. The separate evaluation of surface and core electronic structure leads to the exa…
A series of cellulose/soy protein membranes (CSM) was coated with chitosan to improve the mechanical properties, cytocompatibility, and hemocompatibility. The original CSM and chitosan-coated CSM (CH/CSM) were characterized by Fourier transform infrared spectroscopy, X-ray diffraction analysis, scanning electron micro…
Photoisomerization-induced phase transition of neat liquid-crystalline azobenzene chromophore (LCAC) and its effect on phase diagrams of its mixtures with reactive mesogenic diacrylate monomer (RM257) have been investigated experimentally and theoretically. Upon irradiation with ultraviolet light, the nematic phase of…
The ferroelectric and spin glass properties of CuFe(0.5)V(0.5)O(2) have been studied. Magnetization, ac magnetic susceptibility and specific heat measurements reveal a spin glass behavior (T(f) = 20.5 K) for this delafossite. In CuFeO(2), substitution of trivalent diamagnetic cations for Fe(3 + ) is known to change th…
Metal–ferroelectric–semiconductor (MFS) structures based on ZnO/BaTiO 3 were fabricated by chemical solution deposition (CSD). The microstructure of the heterostructures was characterized by x-ray diffraction and atomic force microscopy. Both ZnO and BaTiO 3 layers were found to be c -axial oriented on LaNiO 3 -coated…
Plasmonic field enhancement of nonradiative exciton relaxation rates in vertically aligned arrays of high aspect ratio CdTe−Au core−shell nanorods was investigated by transient absorption spectroscopy, computational electromagnetics, and kinetic modeling. Increasing shell thickness in the high aspect ratio nanorods wa…
In this study, we focus on processing and characterizing composite material structures made of carbon nanotubes (CNTs) and reproducibly engineering macro-pores inside their structure. Highly porous bucky-papers were fabricated from pure carbon nanotubes by dispersing and stabilizing large 1 μm polystyrene beads within…
In this research, investigation on the interfacial shear strength of poly(lactic acid)–kenaf fiber biocomposite was investigated using microbond tests. Tensile properties and fracture behaviors of single kenaf fiber are tested via in situ monitoring with acoustic emission (AE). During tensile loading, acoustic signal…