Materials Literature
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Computer modeling and simulation is performed to study the domain stabilization effect due to short-range ordering of charged point defects in aged ferroelectrics. Phase field model takes into account various energetic contributions involved in domain aging phenomenon, including chemical, domain wall, electrostatic an…
Highly bulk-sensitive hard x-ray photoemission has been performed for the Magn\'eli phase ${\text{V}}_{5}{\text{O}}_{9}$ and ${\text{V}}_{6}{\text{O}}_{11}$, which are composed of ${\text{V}}_{2}{\text{O}}_{3}$ and ${\text{VO}}_{2}$ from chemical point of view. The valence-band spectra near the Fermi level are rather…
Two-component amphiphiles based on hydrogen-bonded complexes between terephthaloylbisalanine (H(2)TBA) and dodecylamine (DA) are able to self-assemble into nano- and microsized superstructures in an aqueous solvent. It is possible to modulate the morphology of these self-assembled superstructures by modifying the comp…
We report efficient and long-lived exciton photoluminescence (PL) from inverted core/shell ZnSe:Mn/CdSe nanocrystals (NCs) at room temperature. Contrary to low temperature-sensitivity of Mn2+ PL from ZnSe:Mn/ZnSe NCs, the Mn2+-assisted excitonic PL from the ZnSe:4%Mn/CdSe NCs exhibits unusually high temperature-sensit…
Abstract The effects of change in surface energy and bulk viscoelastic properties on the autohesive tack strength of brominated isobutylene‐ co ‐ p ‐methylstyrene (BIMS) rubber have been investigated by the addition of hydrocarbon resin (HCR) tackifier and maleated hydrocarbon resin (MA‐ g ‐HCR) tackifier. The additio…
Abstract The combination of both chain‐internal/chain‐end latent crosslinking in a single thermoset polymer system is the subject of this study. A series of linear carbosiloxane/hydrocarbon homopolymers were synthesized by metathesis polycondensation, polymers which serve as the soft phase in the target chain‐internal…
Abstract Immiscible blends of cellulose acetate butyrate (CAB) and isotactic polypropylenes (iPPs) with different melting index were extruded through a two‐strand rod die. The extrudates were hot‐drawn at the die exit at different draw ratios by controlling the drawing speed. The morphologies of iPP fibers extracted f…
Abstract A new Pluronic (F68)‐1,2‐dipalmitoyl‐sn‐glycero‐3‐phosphoethanolamine (DPPE) (Pluronic (F68)–DPPE) copolymer was synthesized with Pluronic (F68) and DPPE. The chemical structure and physical properties of copolymers were determined by FTIR, 1 H NMR, 13 C NMR, 31 P NMR, and TGA. Environmental scanning electron…
The last few years have been marked by real breakthroughs in the field of nanotechnology. Application of nanoparticles was proposed for diagnosis and treatment of different central nervous system diseases. Exposure to nanoparticles in vivo increases the risk of onset of neurodegenerative diseases and nanoparticles are…
This study reveals that the Ce4+ to Ce3+ ratio in CeO2 nanoparticles (<20 nm) increases with increasing temperature under a hydrogen atmosphere. Such anomalous behavior is due to the physical effect of nanoparticle sizes on increasing the oxidation state of Ce ions in CeO2, which is stronger than the chemical e…
The aim of the research was to study the effect of LLDPE incorporation in the jute fiber-reinforced PET composites (50% fiber by wt). The effect of LLDPE incorporation into PET was investigated by measuring the mechanical properties of the LLDPE blended jute fiber-reinforced PET composites. LLDPE was blended (20-80% b…
The photochemical method is a convenient and simple way to synthesize the polymer brush on surface. We presented here a facile approach to fabricate PMMA brush on silica particles (SPs) by combination of self-assembly monolayer of hyperbranched polymeric thioxanthone (HPTX) and surface-initiated photopolymerization (S…
Abstract A series of low molecular weight linear polyester polyols were synthesized by using various diacids, neopentyl glycol, as a diol, and a trimethylol propane, as a branching monomer. Polyurethane dispersions were prepared primarily from isophorone diisocyanate, polyester polyol, and dimethylol propionic acid, a…
Many conventional technologies for fabricating tissue engineering scaffolds are not suitable for fabricating scaffolds with patient-specific attributes. For example, many conventional technologies for fabricating tissue engineering scaffolds do not provide control over overall scaffold geometry or over cell position w…
The growth rate of nominal Ge2Sb2Te5 phase change material epitaxially grown from the elements by molecular beam epitaxy rapidly decreases above ≈180 °C substrate temperature. A theoretical estimate of this behavior reveals congruent sublimation of the layer, suggesting that it may possess characteristics of a molecul…
Periodic arrays of Ba–O divacancies in BaTiO3 were studied using both first principles calculations and molecular dynamics simulations. It is found that the 2nd-neighbor complexes that are aligned along the direction of the spontaneous polarization have the lowest formation energies. The symmetry between the up and do…
Abstract Fourier transform infrared and nuclear magnetic resonance results suggest that the carboxylic acid groups of poly(lactic acid) (PLA) molecules react with the hydroxyl groups of FePol (FP) molecules during the melt‐blending of PLA x FP y specimens. Differential scanning calorimetry (DSC) and dynamic mechanical…
Abstract A new route was developed for preparation of cellulose acetate (CA) membrane from ramie fiber, a sustainable biomass. Sulfuric acid catalyzed acetylation of ramie fiber was carried out in acetic anhydride. The optimum reaction conditions were determined as ramie fiber to acetic anhydride ratio 1 : 6 (w/w), te…
The internal structures, stability, and elastic properties of free-standing filament bundles of bent-core smectic liquid crystals are studied using polarizing microscopy, scanning electron microscopy, and a customized cantilever containing, temperature controlled heat stage for force measurements. We find that in bund…
Abstract Simultaneous time‐ and energy‐resolved two‐photon photoemission with nanometer resolution is demonstrated for the first time. We monitor the energy dependence of the decay dynamics of electron excitations in individual silver particles, which were deposited from a gas aggregation cluster source onto a silicon…