Materials Literature
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The dimensionless zero-frequency electronic first hyperpolarizability 3−1/4βE107/2m3/2(eℏ)−3 of an electron in one dimension was maximized by adjusting the shape of a piecewise linear potential. Careful maximizations converged quickly to 0.708951 with increasing numbers of parameters. The He…
We present a continuum model for spontaneous twisting of graphene nanoribbons driven by compressive edge stresses. Based on a geometrically nonlinear theory of plates, we identify scaling laws for the dependence of twist angles on ribbon width. Strikingly, we find the existence of a critical width below which a ribbon…
The corrosion inhibition efficiency of sulphathiazole (STZ) on mild steel in 0.5 M HCl at 303-333 K was studied using gravimetric and quantum chemical methods. Results show that STZ acts as inhibitor for steel corrosion even at very low concentration. The adsorption of STZ on steel surface obeyed the Temkin adsorption…
The models of structural organization of cellulose are reviewed within the framework of the semi-crystalline concept. Special attention is given to two crystalline modifications of cellulose: Iα and Iβ. The results of low-resolution 1 H NMR studies of the supramolecular structure of cellulose are considered. The mathe…
The flame-retardant composites of polypropylene (PP) were prepared using a twin-screw extruder by compounding PP with either aluminum hydroxide (Al(OH)3), magnesium hydroxide (Mg(OH)2), zinc borate (ZB), polyolefin elastomer(POE) and nanometer calcium carbonate (nano-CaCO3). The flame retardant properties of these com…
Abstract Well-defined poly(styrene-co-butyl acrylate) nanocomposite latexes were synthesized via reverse atom transfer radical polymerization (RATRP) in miniemulsion. Successful RATRP was carried out by using a hydrophobic ligand of 4,4’-dinonyl-2,2’-bipyridine (dNbpy) and a cationic surfactant of cetyltrimethylammoni…
Methyl radicals react in fast reactions, with rate constants k>1×10(8) M(-1) s(-1), with Au(0), Ag(0) and TiO(2) nanoparticles (NPs) dispersed in aqueous solutions to form intermediates, (NP)-(CH(3))(n), in which the methyl groups are covalently bound to the NPs. These intermediates decompose to form ethane. As n≥2 is…
ZnSb is favourable as a thermoelectric material, from both an environmental and a global resources point of view. Its efficiency can possibly be improved by the reduction of the thermal conductivity through nanostructuring and optimization of doping. These tasks require a better understanding of the material and, in p…
The synthesis of dyes based on a highly substituted terephthalic acid core is described, starting from readily available 2,5-dihydroxy-terephthalic acid diethyl ester. The dyes are highly colored, soluble in organic solvents and reasonably fluorescent in solution and in the solid state. The maxima for absorption and e…
BACKGROUND: The synthesis of anisotropic silver nanoparticles is a time-consuming process and involves the use of expensive toxic chemicals and specialized laboratory equipment. The presence of toxic chemicals in the prepared anisotropic silver nanostructures hindered their medical application. The authors have develo…
Changes in electron density near the surface of a metal gives rise to the largest part of its work function, but a small contribution arises from the penetration of electrons into the classically forbidden region and the dipole component which results. An analytic model of the dipole term is difficult for the image ch…
We present results of LDA calculations (band structure, densities of states, Fermi surfaces) for possible iron based superconductor BaFe2Se3 (Ba123) in normal (paramagnetic) phase. Results are briefly compared with similar data on prototype BaFe2As2 and (K,Cs)Fe2Se2 superconductors. Without doping this system is anti-…
In this work, the corrosion of duplex stainless steel (DSS) alloy 2209 alloy in 2 M HCl and 0.6 M NaCl solutions was studied. The effect of adding ~ 0.3% ruthenium (Ru) as an alloying element on the corrosion passivation of DSS in the solutions under investigation was also reported. The work has been performed using c…
For these two decade, tremendous amount of researches and developments dealing with carbon nanotubes (CNTs) have been carried out. Most of them are focusing on finding the unique and outstanding properties of CNTs and trying to utilizing them as the advanced materials. Whenever we start the research and the developmen…
BACKGROUND: There is an urgent need to develop drug-loaded biocompatible nanoscale packages with improved therapeutic efficacy for effective clinical treatment. To address this need, a novel poly (2-hydroxyethyl methacrylate)-poly (lactide)-1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine [PHEMA-g-(PLA-DPPE)] copolyme…
The evolution of diamond films in bias-enhanced-nucleation (BEN) and bias-enhanced-growth (BEG) processes was systematically investigated. While the BEN process can efficiently form diamond nuclei on the Si substrates, BEG with large enough applied field (> –400 V) and for sufficiently long periods (>60…
Abstract The photochromic 1,3‐diazabiclyclo[3.1.0]hex‐3‐enes 5 and 6 were synthesized from two premade tris‐aldehydes and two premade aziridinyl ketones and characterized ( Scheme 1 ). Their spectra showed structurephotochromic behavior relationships (SPBR), which were analyzed.
Abstract Carbon nanotubes (CNTs) are directly grown by catalytic (C)CVD on Al foils with various surface morphologies to make hybrid electrodes for electric double layer capacitors (EDLCs). A simple drop‐coating procedure is used for the deposition of the Fe/Al‐based catalyst. It is found that the surface topography o…
The inhibition ability of 1, 4-bis-benzimidazolyl-butane (BBB) on mild steel in 0.5 M HCl solution was studied by weight loss measurements, electrochemical techniques and atomic force microscopy (AFM). BBB inhibited mild steel corrosion in 0.5 M HCl solution significantly and the inhibition efficiency increased with B…
Spinel-<TEX>$Li_4Ti_5O_{12}$</TEX> was successfully synthesized by a solid-phase method at 800, 850, and <TEX>$900^{\circ}C$</TEX> according to the <TEX>$Li_4Ti_5O_{12}$</TEX> cubic spinel phase structure. To achieve higher EDLC energy density with the <TEX>$Li_4Ti_5O_{12}$</TEX>, the negative electrode of the hybrid…