Materials Literature
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In this study, four different porous microstructures were modelled and simulated using a random algorithm and a three-dimensional finite element method. The effect of pore morphology on the elastic modulus and thermal conductivity of the porous ceramic was investigated, and their possible roles in determination of the…
Herein we report the achievement of a red emission and NIR emission from a lanthanide and bismuth functionalized L-type zeolite (Ln3+/Bi3+-zeolite L, Ln = Eu, Nd) prepared by a simple ion-exchange process and subsequent annealing. Fine-grained luminescent materials have been produced via this method. The morphology an…
AgNb/Al(2)O(3) prepared by a nonhydrolytic sol-gel process is a highly efficient catalyst for NO(x) removal through selective catalytic reduction by hydrocarbons (HC-SCR). This result shows that the HC-SCR process remains a challenging method for lean engine DeNO(x).
Electrically conducting super-macroporous polymer/carbon nanotubes (CNTs) composites have been fabricated with the aid of cryogenic treatment. CNTs are selectively deposited onto the inner surface of interconnected polymer walls surrounding large air-filled pores. The present concept provides highly conducting nanocom…
Advanced carbon materials with improved physical properties and tailored surface morphology and chemistry were developed and applied as the support for platinum nanoparticles. The carbon materials are in regular spherical form (around 100 μm) and have a scale-like surface morphology. Platinum nanoparticles of high dis…
The copolymerization of o ‐aminophenol (OAP) and aniline (ANI) on Pt and ITO electrodes was studied using cyclic voltammetry in 0.1 M HCl/0.4 M NaCl solution. The films were characterized by SEM, cyclic voltammetry, and UV‐Vis spectroscopy. The properties of the copolymer were compared with PANI and POAP films. The re…
In soft actuators, the creep under tensile loads is a serious problem for the positioning. The creep during electrochemical cycle (electrochemical creep) in conducting polymers is remarkable compared with the static creep under tensile loads. Correlation between the electrochemical creep and the actuating strain in po…
Raman spectroscopy complimented with infrared spectroscopy has been used to determine the molecular structure of the phosphate mineral fairfieldite. The Raman phosphate (PO4)(3-) stretching region shows strong differences between the fairfieldite phosphate minerals which is attributed to the cation substitution for ca…
We present a unified model for calculation of zirconium alloy fuel cladding rupture during a postulated loss-of-coolant accident in light water reactors. The model treats the Zr alloy solid-to-solid phase transformation kinetics, cladding creep deformation, oxidation, and rupture as functions of temperature and time i…
Abstract Hybrid organic-inorganic solar cells from poly(3-hexylthiophene) (P3HT) and freestanding silicon nanocrystals (Si-ncs) combine the advantages of silicon-based photovoltaics with the cost-efficient solution processing technique. At present, the microwave-plasma synthesis of Si-ncs that allows for a future upsc…
Purpose: The focus of this work is to develop a unique drug delivery vehicle which can be taken up by cancer cells and can release the loaded drug. Methods: Core-shell composite nanoparticles have been prepared by one-step Pickering emulsion polymerization with a nonionic initiator, using silica as the sole stabilizer…
Effects of 200 ppm aqueous dispersion of silver nano-particles on gas and liquid permeability of particleboards is studied here. Nano-silver was added at two levels of 100 and 150 milli-liters/kg dry weight wood particles and compared with control boards; all other manufacturing variables remained constant. Gas permea…
A natural bentonite obtained from Khorasan, Iran, was submitted to acid activation with sulphuric acid. Sample aliquots (5gr) were leached with 100 ml H2SO4 solutions of various concentrations (2-7N) at 80±2 oC for 2 hours. X-ray diffraction, chemical analysis, infrared spectroscopy and specific surface area measureme…
In this article, the tube-like nickel oxide materials was synthesized by decomposition of nickel oxalate which was prepared by a facile hydrothermal method. Some experimental parameters affecting the morphology were studied. The electrochemical capacitive properties of the nickel oxide macrotubes were investigated usi…
Anionically synthesized polyisoprene (PI) was catalytically isomerized with RuHCl(CO)(PPh3)3 to produce conjugated PI (CPI). Both the reaction time and temperature were varied to control the number of conjugated dienes along the CPI backbone. The same reaction scheme also conjugated polycyclooctadiene, demonstrating t…
A pentapeptide containing hydrophobic residues self-assembles to form nonporous materials in solid state. The X-ray crystallography reveals that there is no pore in the crystal and the peptide exhibits supramolecular helical architecture prompted by the formation of intra- and intermolecular hydrogen bonds. But the ph…
Ho 3+ /Yb 3+ /Tm 3+ tri-doped Y 2 SiO 5 phosphors were synthesized by the coprecipitation method. Bright white luminescence upon 980 nm near-infrared excitation can be observed for the sample at the optimum chemical composition of Y 2 SiO 5 : 5%Yb 3+ /0.4%Tm 3+ /0.1%Ho 3+ , and the measured white light consisting of b…
Ni(OH)2@Co(OH)2 core–shell nanocolumns have been synthesized by an easy wet chemical process. Characterizations reveal that the layer structure is formed by stacking of several hexagonal nanosheets along the [001] direction. Each sheet is found to be of good crystallinity according to high-resolution transmission elec…
Magnetic hybrid liquid crystal composites have been obtained by thermal decomposition of a cobalt coordination precursor in the presence of a liquid crystal polymer and functional molecules (acid or amine) interacting with the precursor. The final materials contain anisotropic and/or spherical nanoparticles depending…
In recent years colloidal particles and capsules, layer-by-layer (LbL) coated with biocompatible polyelectrolytes, have received much attention as drug-delivery systems. In this study an LbL-assembled, biopolymer-based multilayer system was established as a combined transporter and sensor for monitoring intracellular…