Materials Literature
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Single crystals of Ln(4)Na(2)K(2)M(2)O(13) (Ln = Nd, Sm, Eu, Gd; M = Nb, Ta) were grown out of a reactive high temperature hydroxide melt. The structures were determined by single crystal X-ray diffraction. Ln(4)Na(2)K(2)M(2)O(13) crystallizes in the monoclinic space group C2/c in which niobium and tantalum are locate…
Based on the main physical processes of secondary electron emission from metals, the relation that the product of the number of secondary electron released per primary electron at high incident electron energy and the (n-1)th power of incident energy of primary electron is equal to constant C was deduced, where n is t…
Abstract The effects of molecular weight (MW) of isotactic polypropylene (iPP), the content of β ‐PP, the size of its spherulites and the morphology of its α ‐phase and β ‐phase ( α ‐ and β ‐PP) on the impact strength, with different contents of β ‐nucleating agent, were investigated by two ways. The results show that…
We studied the spatiotemporal dynamics of a new system consisting of sulfide ions (outer electrolyte) diffusing into an organic gel (gelatin) containing mercaptoethanol-capped cadmium ions (inner electrolyte). The product, cadmium sulfide, exhibits a faint yellow transparent propagating front starting at the gel-outer…
Abstract Reaction of nickel(II) thiocyanate and pyridazine (pdz) as organic spacer ligand leads to the formation of the ligand‐rich 1:2 (1:2 = metal to ligand ratio) trinuclear nickel(II) complex of composition [Ni 3 (NCS) 6 (pdz) 6 ]. Depending on the reaction solvent, different polymorphic modifications are obtained…
This article presents the compressive mechanical response at low strains for a collection of polyethylene foams with high densities and cell sizes in the microcellular range. The materials under study had a relative density between 0.27 and 0.92, a homogeneous and multi-structured cellular structure with a dense skin…
We investigate the relationship between the multiexponential photoluminescence (PL) dynamics of large nanocrystal (NC) ensembles and the intensity intermittency (blinking) characteristic of single NCs. A general model is developed and a simple fitting form derived for the analysis of PL decay curves allowing the extra…
The periplasmic ligand-binding protein ChoX is part of the ABC transport system ChoVWX that imports choline as a nutrient into the soil bacterium Sinorhizobium meliloti. We have recently reported the crystal structures of ChoX in complex with its ligands choline and acetylcholine and the structure of a fully closed bu…
We analyze the photo-induced carrier and magnetization dynamics in antiferromagnetic (AFM) ${\text{HoMnO}}_{3}$ single crystals, delineated by wavelength-dependent femtosecond spectroscopy. The emergence of long-range and short-range magnetic order are unambiguously revealed in association with an abnormal blueshift o…
The thermal insulation properties of thermoplastic polyurethane elastomer nanocomposites were characterized at different heat fluxes. Thermoplastic polyurethane elastomer was modified with different loadings of montmorillonite nanoclays and carbon nanofibers (CNFs) via twin screw extrusion processing. The addition of…
A coupled thermo-mechanical model is presented for calculating the compressive strength and failure of polymer laminated composites with thermal barrier when exposed to fire. Thermal barriers are used to protect composite structures from fire, and this article presents a model for calculating the improved structural s…
Atomic pair distribution functions are useful because they have an easy intuitive interpretation and can be obtained both experimentally and from computer-generated structure models. For bulk materials, atomic pair distribution functions are solely determined by the intrinsic atomic geometry, i.e., how atoms are posit…
We reported a novel poly(ether amine) (PEAC) containing poly(ethylene oxide) (PEO) short blocks and coumarin units, which was synthesized by nucleophilic addition/ring-opening polymerization of diepoxy and diamine monomers. PEAC can be directly dispersed in aqueous solution as uniformly sized nanoparticles 50-60 nm in…
The pairing symmetry is one of the major issues in the study of iron-based superconductors. We adopt a minimal two-band tight-binding model with various channels of pairing interaction, and derive a set of two-band Bogoliubov--de Gennes (BdG) equations. The BdG equations are implemented in real space and then solved s…
The mesoscopic reversible and irreversible polarization dynamics in polycrystalline PZT thin film capacitors are studied using local spectroscopic mapping and macroscopic first-order reversal curve measurements. The transition from a regime of short range domain wall motion to the formation of mesoscopic clusters to c…
Flame retardants including magnesium hydroxide (MH) and huntite hydromagnesite (HH) were used to develop halogen free flame retardant (HFFR) compounds based on ethylene vinyl acetate (EVA) for wire and cable applications. Cone calorimeter and limiting oxygen index (LOI) results show that cross-linking affects not only…
Abstract A new strategy for the immobilization of iminium organocatalysts through the acid–base assembly of multidentate chiral primary amines and solid polyacids is presented. A suitable structurally distinctive C 2 ‐symmetric chiral primary amine (CPA) was identified in this study and the optimal CPA–POM hybrid obta…
Cup-shaped nanocarbons (CNC) generated by the electron-transfer reduction of cup-stacked carbon nanotubes have been functionalized with porphyrins (H(2)P) as light-capturing chromophores. The resulting donor-acceptor nanohybrid has been characterized by thermogravimetric analysis (TGA), Raman and IR spectroscopy, tran…
The miscibility behavior of binary mixtures of poly(vinylidene difluoride) (PVDF) and six different kinds of polyhedral oligomeric silsesquioxanes (POSS) compounds ((ethylic) 8 Si 8 O 12 (E-POSS), (phenyl) 8 Si 8 O 12 (P-POSS), (3, 3, 3-trifluoropropyl) 8 Si 8 O 12 (FP-POSS), (1H, 1H, 2H, 2H-nonafluorohexyl) 8 Si 8 O…
Interactions with the substrate that allow near perfect horizontal alignment in combination with large difference in the coefficient of thermal expansion are shown to lead to uniaxial compressive strain in as-grown single-walled carbon nanotubes on single crystal quartz. Temperature dependence of Raman G-band spectra…