Materials Literature
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c -axis preferential orientated ZnO:Co thin films were synthesized on c -plane sapphire substrates by using pulsed laser deposition (PLD) technique in an oxygen-deficient ambient. X-ray diffraction spectra, scanning electron microscopy, X-ray photoelectron spectroscopy, energy dispersive spectroscopy, UV-vis transmitt…
The present paper is concerned with constitutive modeling of the compressive stress-strain behavior of selected polymers at strain rates from 10-3 to 103/s using a modified Ramberg-Osgood equation. High strain-rate compressive stress-strain curves within a strain range of nearly 0.08 for four different commercially av…
String-like ZnS/SnO nanowire/nanosheet hierarchical nanoheterostructures were synthesized by a two-stage vapor transport and condensation method. X-Ray diffraction, scanning electron microscopy, and transmission electron microscopy were used to characterize and analyze the as-synthesized products. The results indicate…
Knowledge of thermal conductance of carbon nanotubes under mechanical deformation is important to characterize the robustness of carbon nanotube heat conduction. In this study, using molecular dynamics simulations, we have calculated thermal conductance of an elastically buckled single-walled carbon nanotube. A local…
The influence of the joining time and temperature on the flexural strength of B4C ceramics joined using an Al sheet was investigated. The B4C ceramics were joined over a temperature range 600–1400°C for 2–72 h in vacuum (10−2–10−4 Pa) and in an Ar atmosphere. A joining interlayer with a dense structure was found in th…
Semiaromatic poly(ethylene terephthalamide/hexamethylene terephthalamide) copolymer (PA2T/6T) was synthesized through the reaction of terephthaloyl chloride, 1,6-hexane diamine and 1,2-ethylene diamine by the method of interfacial polycondensation. The inherent viscosities of the resultant copolymers prepared with opt…
We observed the dynamics of carbon black in rubber during the vulcanization (cross-linking) process, using X-ray photon correlation spectroscopy. The intensity fluctuations of scattered X-rays gradually slowed down during the vulcanization process. The evolution of the dynamics was investigated by analyzing the intens…
In this study, we used electrochemical deposition with a polystyrene (PS) bead template to prepare thin layers of poly(3,4-ethylenedioxythiophene) (PEDOT) that has a nanometer-scale honeycomb periodicity. To achieve dual-color electrochromic films, we then used pulsed electrochemical deposition to form polyaniline (PA…
In this review, we summarize the latest studies on thermal conductivity (TC) of composite materials. TC enhancement of composite materials has been manipulated by using fillers of different properties: material type, size, geometries, and functionalization. Examples of filler size ranges are nanoparticles (1–100 nm) a…
Fabrication of phytogenic metal nanoparticles is a developing area of nanobiotechnology which has economic and potentially eco-friendly advantages over conventional chemical and physical synthesis methods. We report the synthesis of anisotropic gold nanostructures using a phytoextract from the leaves of the pin oak tr…
We report well-defined and uniform hollow urchin-shaped zinc oxide (ZnO) nanostructures on a micro-patterned transparent substrate by the process of electrochemical deposition. The thin aluminum-doped ZnO (AZO) film was completely covered on the patterned sapphire substrate by radio frequency (RF) magnetron sputtering…
Polymer brushes have many desirable characteristics such as the ability to tether molecules to a substrate or change the properties of a surface. Patterning of polymer films has been an area of great interest due to the broad range of applications including bio-related and medicinal research. Consequently, we have inv…
Liquid marbles are water droplets covered with solid particles. Here we show a method for the preparation of edible liquid marbles and capsules covered with fatty acid crystals and triacylglycerol crystals. We prepared liquid marbles using a simple method; namely, a water droplet was rolled on lipid crystals in petri…
Thin films of graphene oxide, graphene and copper (II) phthalocyanine dye have been successfully fabricated by electrostatic layer-by-layer (LbL) assembly approach. We present the first variable angle spectroscopic ellipsometry (VASE) investigation on these graphene-dye hybrid thin films. The thickness evaluation sugg…
Magnetic iron oxide nanoparticles with proper surface coatings are increasingly being evaluated for clinical applications such as hyperthermia, drug delivery, magnetic resonance imaging, transfection and cell/protein separations. In this work, silica coated iron oxide magnetic nanoparticles, which are very useful for…
When used as additives, silicas strongly promoted the epoxidation of cyclooctene by (t)BuOOH in the presence of Ti-silsesquioxane (Ti-POSS), where Ti species were found to be bound to the silica surface. Based on this observation, highly-active silica-supported Ti catalysts were prepared by the thermal treatment of mi…
Nanoconfinement is receiving increasing interest in the field of energy storage and has been applied to different metal hydride systems in order to improve their properties for hydrogen storage. Modified hydrogen sorption kinetics and thermodynamics of metal hydrides have been achieved by nano size effects. In case of…
Defects in nematic liquid crystals under controlled confinement serve as a useful tool to characterize material properties as well as to reveal texture stability and pattern formation mechanisms in anisotropic soft matter. In particular, nematics inside micro-capillaries can exhibit a large variety of textures with po…
The aim of the present study was to investigate the in vitro antioxidant assays and in vivo non enzymatic antioxidant potential of aerial parts of Pergularia daemia methanolic extract (PDME) on 7, 12-dimethylbenz(a)anthracene (DMBA) induced hamster buccal pouch (HBP) carcinogenesis. The plant extract was tested for th…
Binders and plasticizers are key materials that decide the mechanical properties of composite propellants. Hydroxyl-terminated polybutadiene (HTPB) is commonly used as a binder for composite propellants, while polytetrahydrofuran (PTHF) is a useful plasticizer of the HTPB binder. In this study, the dynamic mechanical…