Materials Literature
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Charge dynamics of (Ti1-xVx)2O3 with x=0-0.06 has been investigated by measurements of charge transport and optical conductivity spectra in a wide temperature range of 2-600 K with the focus on the thermally and doping induced insulator-metal transitions (IMTs). The optical conductivity peaks for the interband transit…
This paper aims at giving an idea of the contributions to the study of corrosion phenomena ensured by the practice of localized electrochemical techniques. For many corrosion phenomena high resolution is required. This is due to the fact that a huge amount of relevant information about electrochemical processes can be…
The solid state thermal, one pot, efficient chemical reaction between Zn and S or Se elements in a closed reactor at 650 degrees C/60 min under their autogenic pressure in an inert atmosphere yielded luminescent ZnS and ZnSe semiconducting nanopowders (NPs). Scanning and Transmission electron microscopy measurements c…
We present a first-principles study of ${\text{VO}}_{2}$ in the rutile and monoclinic $({M}_{1})$ phases by means of all-electron full-potential linear muffin-tin orbital GW calculation. Full frequency dependence and off-diagonal matrix elements of the self-energy are taken into account. As a result of dynamical corre…
Abstract Self‐assembling dendrons sterically disfavor the cisoid conformation through which 6 π ‐electrocyclization proceeds in cis ‐polyarylacetylenes. Through the same mechanism, selected self‐organizable dendronized helical cis ‐polyphenylacetylenes ( cis ‐PPAs) undergo an unprecedented thermally induced cisoid‐to‐…
Abstract Nanocomposites of linear low‐density polyethylene (LLDPE), with three different amounts of polyhedral oligomeric silsesquioxanes (POSS), were prepared through melt‐mixing in a batch‐mixer at 150 °C. The structure of the prepared nanocomposites was studied by X‐ray scattering and optical microscopy. The surfac…
Specimens of poly( l -lactic acid) (PLLA) with 0.43 ≤ χ c ≤ 0.65 were dielectric characterized. The relaxation process associated to the dynamic glass transition shifts to higher frequencies/lower temperatures with the increase of crystallinity. From the VFT temperature dependence of relaxation times, the glass transi…
Based on ab initio molecular-dynamics simulations, we have investigated the properties of ${\text{TeO}}_{2}$ glass generated by fast quenching from the liquid phase. Structural properties of the glass model are in good agreement with available diffraction data. Inspection on the local structure of the glass phase reve…
Theoretical calculations using density functional methods combined with relativistic approaches have been employed to study the magnetic properties of heterodinuclear Cu II Gd III complexes. The calculated exchange coupling constants show an excellent agreement with the experimental ferromagnetic data confirming a mag…
It's what's inside that counts! Nanoporous materials with large internal surface area have been extensively employed as host materials in nanotechnology. Since the lower co-ordination of atoms of nanoporous structures can lead to the redistribution of electronic charge and change the cohesive energy of single atoms in…
An acid-sensitive semiperfluoroalkyl resorcinarene was synthesized, and its lithographic properties were evaluated. Its solubility in segregated hydrofluoroether solvents enables the patterning of delicate organic electronic materials.
The development of biodegradable materials with elastomeric properties is beneficial for a variety of applications, including for use in the engineering of soft tissues. Although others have developed biodegradable elastomers, they are restricted by their processing at high temperatures and under vacuum, which limits…
Pea starch films were produced with various plasticizers (glucose, fructose, mannose, sorbitol, and glycerol). Effects of plasticizer content (4.34 to 10.87 mmol/g of dry starch) and storage relative humidity (RH) (11.3% to 75.4%) on moisture content (MC), tensile strength (TS), elongation (E), modulus of elasticity (…
Sodium-ion self-diffusion in $P2(\ensuremath{\gamma}){\text{-Na}}_{x}{\text{CoO}}_{2}$ has been studied using a single crystal as an electrode. Mass transport and thermodynamic properties of Na ions were measured by the potentiostatic intermittent titration technique on a single-crystal electrode with greater accuracy…
In this study, chitosan nanoparticles were prepared and incorporated in hydroxypropyl methylcellulose (HPMC) films under different conditions. Mechanical properties, water vapor and oxygen permeability, water solubility, and scanning and transmission electron microscopy (SEM and TEM) results were analyzed. Incorporati…
We present evidence for the formation of transient hydroxyls from the reaction of water with atomic oxygen on Au(111) and investigate the effect of adsorbed oxygen on the hydrogen bonding of water. Water is evolved in peaks at 175 and 195 K in temperature programed reaction experiments following adsorption of water on…
New iron(II) complexes of formulas [Fe(abpt) 2(tcm) 2] ( 1), [Fe(abpt) 2(tcnome) 2] ( 2), and [Fe(abpt) 2(tcnoet) 2] ( 3) (abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole, tcm (-) = [C(CN) 3] (-) = tricyanomethanide anion; tcnome (-) = [(NC) 2CC(OCH 3)C(CN) 2] (-) = 1,1,3,3-tetracyano-2-methoxypropenide anion; tcn…
In this article, we present a genetic algorithm (GA) as one branch of artificial intelligence (AI) for the optimization-design of the artificial magnetic metamaterial whose structure is automatically generated by computer through the filling element methodology. A representative design example, metamaterials with perm…
The cavity–particle dynamics at cavitation inception on the surface of spherical particles suspended in water and exposed to a strong tensile stress wave is experimentally studied with high-speed photography. Particles, which serve as nucleation sites for cavitation bubbles, are set into a fast translatory motion duri…
Magnesium, due to its biocompatibility, a necessity in metabolic processes, and better mechanical properties than polymer, is an ideal candidate for biodegradable implants. The main actual limitation for the use of magnesium alloys is its too fast degradation rate in the physiological environment. The corrosion behavi…