Materials Literature
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Liquid crystals (LCs) are synthetic and biological viscoelastic anisotropic soft matter materials that have a combination of fluidity of liquids and anisotropy of solids and find use in optical devices, sensor/actuators, lubrication and super-fibres. Mesogens are frequently mixed with colloidal and nanoparticles (NPs)…
PURPOSE: A lipid-based, nanomicelle-loaded docetaxel (M-DOC) was designed and characterized. Optical imaging was employed to evaluate the pharmacokinetics and antitumor efficacy of docetaxel in vivo. MATERIALS AND METHODS: The M-DOC was prepared using the emulsion-diffusion method. Transmission electron microscopy and…
The biosynthesis of gold nanoparticles would benefit from the development of clean, nontoxic, and environmentally acceptable procedures concerning microorganisms from bacteria to fungi. Streptomyces are saprophyte bacteria that have the enormous ability to produce secondary metabolites such as vitamin B, antibiotics,…
Extreme ultraviolet (EUV) radiation-induced carbon contamination and oxidation of Au surfaces were investigated using x-ray photoelectron spectroscopy (XPS). The Au sample was irradiated by EUV radiation at 13.5 nm for 9 h, while a series of XPS spectra were recorded for monitoring chemical modification during EUV exp…
Corrosion noted on a number of nineteenth and twentieth century indoor bronze sculptures in the collection of the National Gallery of Canada was the cause for a major condition survey of its Canadian, American, and European bronzes. The results led to a comprehensive study, which included material analysis. This artic…
Conjugated bi-layer C 8 metamaterials are proposed. Chirality and refractive index can be controlled effectively by the structure geometry. Extreme chirality results in a high negative refractive index for both right- and left-circular polarized excitations. The conjugated bi-layer C 8 structures are fabricated and te…
Within the framework of this study, the physical modification of high-density polyethylene waste foil was performed using finely ground hazelnut flour to produce a composite whose physical, mechanical and flammable properties make it possible to use inside and outside of buildings. Three mixtures were produced with fi…
Abstract A method for nuclear magnetic resonance (NMR) characterization of whole cell wall components, including lignin, cellulose and hemicelluloses, was recently developed in our laboratory. The method described for fir ( Abies sachalinensis ) as a softwood consists of ball-milling of cell wall, dissolution in an io…
This paper studies the influence of surface effects (including the residual surface stress and surface elasticity) on the nonlinear free vibrations of nanoscale plates. The motion equations are derived by using the Hamilton’s principle and solved numerically. It is found that the influence of surface effects on the no…
Ripples in graphene monolayers deposited on SiO(2)/Si wafer substrates were recently shown to give rise to friction anisotropy. High friction appears when the AFM tip slides in a direction perpendicular to the ripple crests and low friction when parallel. The direction of the ripple crest is, however, hard to determin…
Tissue regeneration is aimed at producing biological or synthetic scaffolds to be implanted in the body for regenerate functional tissues. Several techniques and materials have been used to obtain biodegradable synthetic scaffolds, on which adhesion, growth, migration and differentiation of human cells has been attemp…
Charge carrier concentration (n0) and effective mobility (μeff) are reported in two polymer films (<10 μm) and in a very high temperature range (from 200 to 400 °C). This was possible thanks to an electrode polarization modeling of broadband dielectric spectroscopy data. It is shown that the glass transition te…
A 2D particle-in-cell code, including the space charge effects of insulator surface charge, is established to simulate the initiation of insulator surface flashover. The simulation is started with a field electron emission, which provides the seed electrons of the surface flashover discharge. Then the secondary electr…
The intrinsic dielectric frequency dependent spectrum of single domain barium titanate (BaTiO3) at room temperature is investigated by considering the vibration of phonons and the conductivity of the tetragonal system in a wide frequency range up to THz. The proposed model combines Debye type of dissipation, soft mode…
A first attempt has been made to study the effect of codoping of transition metal and sp metal on the electronic structure and associated optical properties of TiO2, through V-Ga codoped thin films. V-Ga codoped rutile TiO2 films were fabricated on fused quartz substrates using pulsed laser ablation, followed by heat…
With the aim of optimizing the properties of tin-doped indium oxide (ITO) films as applied to silicon solar cells, ∼100-nm-thick ITO films were deposited onto (nn +)-Cz-Si and glass substrates by ultrasonic spray pyrolysis in argon at a temperature of 380°C. The relative Sn and In content in the film-forming solution…
Abstract The Young's modulus of graphene with various rectangular and circular vacancy defects is investigated by molecular dynamics simulation. By comparing with the results calculated from an effective spring model, it is demonstrated that the Young's modulus of graphene is largely correlated to the size of vacancy…
This study presents the preparation of regenerated cellulose (RC)/graphene nanoplatelets (GNPs) nanocomposites via room temperature ionic liquid, 1-ethyl-3-methylimidazolium acetate (EMIMAc) using solution casting method. The thermal stability, gas permeability, water absorption and mechanical properties of the films…
The development of new promising heat-resistant materials capable of functioning at high temperatures under oxidation conditions is considered. The results of the development of a technology for producing high-temperature ceramic composites with a multilevel complex protection system are presented.
The reduction characteristics of <TEX>$NO_2$</TEX> to NO are experimentally studied over a platinum-based catalyst, especially at lower temperatures below about <TEX>$200^{\circ}C$</TEX>. In the present work, two types of steady-state experiments, engine bench and synthetic gas bench tests, are carried out in sequence…