Materials Literature
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This paper describes the use of a Monte Carlo model incorporating a finite-element method computing the electrostatic fields inside and outside a semiconductor, plus a ray-tracing algorithm for determining the doping contrast observed in a scanning electron microscope (SEM). This combined numerical method also enables…
The inhibition efficiency (IE) of Urea in controlling corrosion of carbon steel in sea water in the absence and presence of Zn 2+ has been evaluated by weight loss method. The formulation consisting of 250 ppm urea and 50 ppm Zn 2+ has 94% IE. It is found that the inhibition efficiency (IE) of urea increases by the ad…
To replace the environmentally hazardous chromates, several non-chromates have been used as corrosion inhibitors. Extracts of plant materials top the list. The plant extracts are environmentally friendly, non-toxic and readily available. These extracts contain many ingredients. They contain several organic compounds w…
Environmental awareness, increasing concern with th e green house effect and bio-degradation have hastened the construction, automotive and pack aging industries to look forward for sustainable materials with least impact on the exis ting surroundings. Natural fibers reinforced bio-degradable composites seem to be a g…
Bowl-shaped tribenzotriquinacene (TBTQ) derivatives containing hydroxyl groups at their peripheral sites are successful monomers for the synthesis of polymers of intrinsic microporosity (PIMs) with examples of both network and non-network PIMs demonstrated. Nitrogen adsorption measurements reveal apparent surface area…
Inspired by the self-cleaning lotus leaf, here we report the fabrication of flexible fluorinated silica nanofibrous membranes with biomimetic non-wettable surfaces by electrospinning blend solutions of poly(vinyl alcohol) (PVA) and silica gel in the presence of silica nanoparticles, followed by calcination and fluoroa…
Bent-core molecules based on a resorcinol bisbenzoate core with a series of distinct substituents in different positions at the central resorcinol core have been synthesized and characterized. The focus is on the effect of branched terminal groups in the racemic and chiral forms on the mesomorphic properties. These we…
Two dinuclear aluminum alkyl complexes supported by a piperazidine-bridged bis(phenolato) group were prepared, and both complexes exhibited extremely high activity for the ring-opening polymerization of ε-caprolactone. In the presence of benzyl alcohol (BnOH), the polymerization accelerated dramatically.
Poly(methyl methacrylate) (PMMA) functionalized multi-walled carbon nanotubes (MWNT) (f-MWNT) are prepared using nitrene chemistry and atom transfer radical polymerization. The >CO groups in the f-MWNT interact with the >CF2 groups of poly(vinylidene fluoride) (PVDF) to achieve a compatible blend. An increase of the g…
By taking advantage of the anisotropy of AuNRs, we design different bifunctional PEG molecules to selectively bind to either the end or side face and simultaneously protect other faces of individual AuNRs. In this way, we successfully achieve orientation-controllable assemblies of AuNRs into side-by-side (SS), end-to-…
We report the photophysical properties of new BODIPY derivatives monosubstituted at the central position. The presence of different functional groups induced the appearance of new photophysical processes in BODIPY dyes, such as intramolecular charge or energy transfer. These phenomena are sensitive to solvent properti…
Graphene and carbon nanotubes are considered as future materials in various fields, including adsorption, accumulation and separation processes, and so are hybrid materials combining their properties. This paper reports our study on separative abilities of 3-D network structures consisting of graphene planes pillared…
Nickel ferrite nanoparticles dispersed in SiO2 matrix have been synthesized by sol-gel method. Structural analysis has been performed by using x-ray diffraction and transmission electron microscopy. Magnetic properties have been investigated by using superconducting quantum interference device magnetometry. In additio…
Spiral multiferroics whose ferroelectricity is driven by spatial spin modulation attract considerable attention due to strong magnetoelectric coupling observed in them. The present paper shows that a similar mechanism is involved in the case of conventional micromagnetic structures such as domain walls. It is shown ex…
The development of temperature-responsive and biodegradable polymeric nanoparticles with tunable temperature sensitivity is of great interest. In this study, alternating polyurethanes were synthesized from diisocyanate (L-lysine ethyl ester diisocyanate (LDI) or hexamethylene diisocyanate (HDI)) and poly(ethylene glyc…
The crystallographic, magnetic and electronic structures of the ferromagnetic shape memory alloys Ni2XGa (X=Mn, Fe, and Co), are systematically investigated by means of the first–principles calculations within the framework of density functional theory using the VIENNA AB INITIO SOFTWARE PACKAGE. The lattice parameter…
A convenient and cost-effective chemical approach was developed to fabricate Au aggregates with uniform 1 nm nanogaps through the assembly of cucurbit[n]urils with Au colloids. Cucurbit[n]urils located in the nanogap region can be used as a useful SERS hot-spot nanocontainer to realize the SERS enhancement of an "iner…
This paper presents tensile and low cycle fatigue properties of copper thin films used in electronic devices. Copper films tested were rolled copper, electrolytic copper, direct current plated copper and pulse plated copper films. Tensile tests and strain controlled 4-point bending low cycle fatigue tests were carried…
We have demonstrated electroswitchable emission and coloration using a novel composite material containing luminescent europium(III) complex Eu(hfa)(3)(H(2)O)(2) and diheptyl viologen HV(2+). The photoluminescence of the Eu(III) complex was controlled by the electrochemical coloration of HV(2+)via intermolecular energ…
Besides high geometrical accuracy medical devices strongly require a good surface integrity of the produced parts. Surfaces should be optimized to reduce friction or to increase cell adhesion for optimal fitting, mechanical stability and biocompatibility to reduce the risk of inflammatory reactions. Therefore surfaces…