Materials Literature
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First-principles DFT calculations are carried out to study the changes in structures and electronic properties of two-dimensional single-layer graphene in the presence of non-covalent interactions induced by carbon and boron fullerenes (C60, C70, C80 and B80). Our study shows that larger carbon fullerene interacts mor…
Coupled processes of dynamic recovery and precipitation, occurring during hot-rolling and subsequent aging, lead to the formation of a unique honeycomb network of precipitates in commercial Mg–Y–Nd–Zr or WE43 alloy. The honeycomb network is developed on the (0 0 0 1)Mg basal planes and consisted of fine Nd-rich β 1 pl…
ABSTRACT A phosphorous flame retardant (DOPO‐MAH) was synthesized through the reaction between of 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) and maleic anhydride (MAH) and confirmed by FT‐IR, 1 H NMR, and 31 P NMR techniques. The obtained flame retardant was then melt blended with poly(butylene terephth…
Weak polyelectrolytes (PEs) are complex because intertwined connections between conformation and charge are regulated by the local dielectric environment. While end-tethered PE chains-so-called PE "brushes"-are archetypal systems for comprehending structure-property relationships, it is revealed that the reference sta…
Thermal interface materials (TIMs) based on vertically aligned carbon nanotube (VACNT) films promise the unusual combination of high thermal conductance and low elastic modulus, properties that are critical for TIM performance and reliability. This paper reports through-plane thermal conductivity, heat capacity, and b…
Oxides formed by electrochemical treatment of metals frequently have properties and structures very different from the respective bulk oxides. Here, electronic structure and chemical composition were investigated for the oxide formed on polycrystalline zinc after electrochemical oxidation, and after subsequent reducti…
Most polyolefins that are used for dielectric materials exhibit a low dielectric constant and operating temperatures up to 70°C. Polyimides offer a means to a higher dielectric constant material by the introduction of a polar group in the polymer backbone and are thermally stable at temperatures exceeding 250°C. A com…
High pressure and high temperature synthesized MoB2 and WB2 compacts were investigated using X-ray diffraction, energy dispersive spectroscope, scanning electron microscope, Vickers indentation test and ultrasonic measurements. Experiments showed that both MoB2 and WB2 compacts are phase pure and with a grain size of…
Semiconductor quantum dots (QDs) have emerged as a new class of light harvesting materials for solar energy conversion due to their unique size-dependent properties. Most recent studies have focused on II-VI group (such as CdX, X = S, Se, and Te) QDs and lead salt (such as PbS, PbSe, and PbTe) QDs. In this paper, we i…
We present a unique experimental configuration that allows us to determine the interfacial forces on nearly parallel plates made from the thinnest possible mechanical structures, single and few layer graphene membranes. Our approach consists of using a pressure difference across a graphene membrane to bring the membra…
Little is known about the efficacy of pulsed ultrasound compared with continuous ultrasound. Previous studies on the efficacy of pulsed ultrasound were not systematic and gave different results. In this study, the effects of pulse length, pulse interval, pulse length × pulse intervals, and treatment time on sonochemic…
Several new thallium(iii) complexes, [Tl(4,4'-dmbpy)Cl3(DMSO)]·H2O (1), [Tl(4,4'-dtbpy)Cl3(DMSO)] (2), [Tl(5,5'-dmbpy)Cl3(DMSO)]·(5,5'-dmbpy) (3), and [Tl(6-mbpy)Cl3(DMSO)] (4) (4,4'-dmbpy = 4,4'-dimethyl-2,2'-bipyridine, 4,4'-dtbpy = 4,4'-ditert-butyl-2,2'-bipyridine, 5,5'-dmbpy = 5,5'-dimethyl-2,2'-bipyridine, and 6…
There is a growing interest in the use of green resources for nanoparticle (NP) synthesis. Natural polymer, Chitosan (CH) has been employed as templates for the preparation of metal oxide NPs. They modify the surface characteristics of the nanometal oxides generated. In the presence of template CH, the spatial separat…
Au revoIR: Hexaphyrin Au(III)-Ir(III) complexes were prepared from the reaction of a mono-Au(III) [26]hexaphyrin complex with [IrCl(cod)]2 followed by treatment with pyridine. N-Fusion reaction of this complex gave a syn-doubly N-fused hexaphyrin as the major product, which displayed antiaromatic properties such as st…
This paper reports the morphology, ion impact, and kinetic parameters of Y2O3:Dy3+ phosphor induced by 150-MeV Ni7+, 120-MeV Ag9+, and 110-MeV Au8+ swift heavy ions (SHIs) in the fluence range 1 × 1011–1 × 1013 ions cm−2. The X-ray diffraction (XRD), transmission electron microscope (TEM), and Fourier transform infrar…
We report first-principles molecular dynamics calculations combined with rare events sampling techniques that clarify atom-scale mechanisms of oxygen plasma etching of graphene. The obtained reaction pathways and associated free-energy landscapes show that the etching proceeds near vacancies via a two-step mechanism,…
A facile method for the preparation of silica/silicone nanofilament hybrid coatings with almost perfect superhydrophobicity (contact angle=179.8° and sliding angle=1.3°) is presented. The coatings are obtained by dip-coating of silica nanoparticles, followed by chemical vapor deposition of silicone nanofilaments. Pred…
Bis(2-methoxyethoxy)methylallylphosphonate (BMEMAP) was synthesized as bi-functional additive of flame retardant and film former in electrolytes of ethylene carbonate (EC) and dimethyl carbonate (DMC). The flame retardancy of the additive was characterized by measuring the self-extinguishing time of electrolytes. It i…
The immobilization of copper complexes by covalent anchoring of the ligand on the surface of mesoporous MCM‐41 has been described. Bis[2‐(phenylthio)benzylidene]‐1,2‐ethylenediamine as a new N 2 S 2 donor salen‐type ligand was covalently anchored onto nanopores of MCM‐41 coordinated with copper (I) halide. The organic…
Eine Kombination aus Plasmonenresonanz-Rayleigh-Streuung (PRRS) und Dunkelfeldmikroskopie (DFM) ermöglicht die Verfolgung einer Klick-Reaktion auf Nanopartikelebene in Echtzeit. Klick-Reaktionen auf der Oberfläche einzelner Goldnanopartikel (GNPs) führen zur Partikel-Partikel-Kupplung und diese wiederum zu einer Rotve…