Materials Literature
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We use a combination of conventional density functional theory (DFT) and post-DFT methods, which include the local density approximation plus Hubbard $U$ ($\text{LDA}+U$), PBE0, and self-consistent $\mathit{GW}$, to study the electronic properties of Ni-substituted PbTiO${}_{3}$ (Ni-PTO) solid solutions. We find that…
Luminescent carbon nanoparticles (CNPs) are newcomers to the world of nanomaterials and have shown great impact in health and environmental applications as well as being promising building blocks for future nanodevices because of their fascinating photoluminescence and potential to serve as nontoxic replacements for t…
Eu(2+)-activated Sr(8)MgY(PO(4))(7) and Sr(8)MgLa(PO(4))(7) yellow-emitting phosphors were successfully synthesized by solid-state reactions for applications in excellent color rendering index white light-emitting diodes (LEDs). The excitation and reflectance spectra of these phosphors show broad band excitation and a…
A fluorescent compound, 9,10-bis(2-(10-hexyl-10H-phenothiazin-3-yl)vinyl) anthracene, has been synthesized and studied. The results show that the compound possesses piezofluorochromic properties as well as aggregation-induced emission enhancement effect. The spectroscopic properties and morphological structures are re…
<div class="section abstract"><div class="htmlview paragraph">One of the most effective NVH solutions used in the automotive industry to reduce structure-borne noise is to apply vibration damping treatments to the vehicle structure. These damping treatments need to meet increasing weight reduction targets,…
The resistivity of mats of single-walled carbon nanotube (SWCNT) bundles has been measured in the temperature range 286–1051 K under high vacuum. The apparent density of mats was close to 1 g cm –3 as obtained by pressing a weighted amount of SWCNTs at 0.6 GPa. Large hysteresis of resistivity has been recorded through…
Still photographs of discharge events reveal a multitude of phenomena, most of them well known, but sometimes, an unexpected phenomenon appears. Here, a photograph where leaders meet midgap in a positive 1-m rod-to-plane electrode configuration subjected to a switching impulse voltage is presented. The appearance of a…
The effect of organomodified nanoclay on the morphology and properties of a (70/30 w/w) nylon 6/poly(methyl methacrylate) (PMMA) blend prepared by a melt processing method was investigated. The number average domain diameter (Dn ) of the dispersed PMMA phase was found to decrease with the addition of a small amount [0…
Air plasma-pretreated poly(tetrafluoroethylene) (PTFE) films were subjected to further surface modification by liquid-phase graft copolymerization with acrylic acid monomer (AAc). The surface compositions and microstructures of the modified films were characterized by X-ray photoelectron spectroscopy (XPS) and scannin…
The structure of isotope-substituted SrTi 18 O 3 (STO18) below T c = 24 K has not been made fully understood yet. We have shown that it is orthorhombic C 2 v with polarization parallel to [110] c , but other groups reported other structures such as ∥[111] c and ∥[100] c . In this paper, it is shown that the dipole int…
Polyacetylene is a well-known conductive polymer and when doped its conductivity can be altered by up to 12 orders of magnitude. However, due to entropy effects a polyacetylene chain usually suffers from distortions and interchain couplings which lead to unpredictable changes in its conducting property. Encapsulating…
Abstract A simple, one step technique for depositing ultrasmooth gold films using pulsed laser deposition is demonstrated by optimizing process parameters. The smoothest film having a root‐mean‐square roughness of 0.17 nm (including the substrate roughness of 0.11 nm) for a 35 nm thick film on a silicon substrate are…
The temperature dependence of the crystal structures of the low-temperature α-phase and the intermediate-temperature β-phase of crystalline malononitrile, CH(2)(CN)(2), have been determined using Rietveld refinement on neutron powder diffraction data. The results confirm that the α-phase has the same structure as the…
Luminescent lanthanide nanocrystals (NCs) are proposed to be a promising new class of fluorescent labeling agents due to their attractive optical and chemical features including low toxicity, wide photoluminescence (PL) emission and high resistance to photobleaching. In this paper, an ionic-liquid-induced synthesis of…
A characteristic new cooperative dehydration transition, in 1:1 Laponite-MMT cogel, was observed at T(c) ≈ 60 °C, a temperature at which the storage modulus (G(')) and depolarization ratio (D(p)) showed sharp increase, and the isotropic cogel turned into an anisotropic one. The dehydration dynamics could be described…
Abstract Polypropylene (PP)/clay nanocomposite was melt‐compounded using high shearing/mixing and chaotic mixing, the former provided by kneading block sections in twin‐screw extruder and the latter by a convective screw. Effect of mixing type on rheological behavior and microstructure of nanocomposites was investigat…
Abstract Reaction of Zn II and Cd II thiocyanate or selenocyanate with pyrazine leads to the formation of new Zn II and Cd II coordination compounds. The structures of [Zn(NCSe) 2 (pyrazine) 2 ] n ( 1A ), [Cd(NCS) 2 (pyrazine) 2 ] n ( 2A ) and [Cd(NCSe) 2 (pyrazine) 2 ] n ( 3A ) consist of octahedrally coordinated met…
Na 8 CeSi 6 O 18 and Na 8 Ce 0.73 Ti 0.27 Si 6 O 18 (denoted CeSiO-CJ11A and CeTiSiO-CJ11B, respectively) were the first successful examples of Ce 4+ and Ce 4+ /Ti 4+ mixed silicates synthesized under mild hydrothermal conditions at 503 K. Their isostructure is confirmed by the powder X-ray diffraction (XRD) analysis.…
Abstract Regions of space are defined to maximize the probability to find two electrons in it. They can be interpreted as regions where Lewis’ electron pairs are most likely to be found. These maximum probability domains (MPDs) provide information similar to that obtained from the electron localization function (ELF),…
Functionalized nanoporous materials have broad utility for catalysis applications. However, the kinetics of catalytic reaction processes in these systems can be strongly impacted by the anomalous transport. The most extreme case corresponds to single-file diffusion for narrow pores in which species cannot pass each ot…