Materials Literature
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A hybrid electrochemical energy storage device was fabricated in aqueous NaOH with the 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) nitroxide radical as the active material, hydroquinone as the counter electrode active material, and an OH − -selective separating membrane. The working principle of this device was inves…
We demonstrate that nanocomposites (metals and metal carbides and sulfides) can be produced by thermolysis (370 and 600°C) in a self-generated atmosphere using Cu(II), Co(II), and Ni(II) 2-hydroxy- and 2-N-tosylaminobenzaldehyde azomethine bis-chelates as precursors.
A detailed kinetic picture derived by molecular beam studies of the adsorption–desorption of the NO/Pd(111) system is presented. Numerical simulations and detailed kinetic analysis show that the precursor state model of adsorption provides a valid picture of the sticking coefficient variation with surface coverage, es…
The present study briefly reviews the effect of ion irradiation in inducing structural transformation in oxide materials. The effect of ion irradiation on simple systems such as Y2O3, CuO, ZrO2, HfO2 and TiO2 and a few members of the high T c cuprate superconductor family are examined. Some of the phase transformation…
Hierarchical‐structure ZnO consisting of ZnO nanoneedles on ZnO nanofibers was fabricated by a two‐step procedure – first electrospinning and then aqueous solution processes. Field emission ( FE ) property of the needle‐on‐fiber hierarchical‐structure ZnO was tested. The low turn‐on field of the field emission at 4.8…
We study multigap superconductivity, with strong angular variations of one of the gaps, as appropriate for certain iron-based high-temperature superconductors. We solve the gap equations of this model and find that the nodes or zeros in the gap function present at ${T}_{c}$---although purely accidental---typically sur…
The accuracy of multislice high-resolution transmission electron microscopy (HRTEM) simulation can be improved by calculating the scattering potential using density functional theory (DFT) [1-2]. This approach accounts for the fact that electrons in the specimen are redistributed according to their local chemical envi…
The diatoms (Bacillariophyta) from a coastal lagoon from the Diablas wetlands (Isla Isabela, the Galápagos Islands) were studied in material from surface samples and a sediment core spanning the past 2,700 years in order to examine evidence of diatom evolution under geographic isolation. The total number of taxa found…
Developing simple synthetic methods to control the size and morphology of nanocrystals is an active area of research as these parameters control the material's electronic and optical properties. For a semiconductor with a symmetrical crystal structure such as lead selenide, anisotropic colloidal growth has been previo…
The recrystallization and thermal stability of nanocrystalline lead sulfide have been studied by X-ray diffraction and scanning electron microscopy. PbS nanoparticles ranging in size from 10 to 20 nm were prepared by chemical precipitation from aqueous solutions. To assess the thermal stability of the size of PbS nano…
The exact and closed form solutions for the photoluminescence quantum yield (PL QY), effective exciton lifetime, and effective exciton diffusion length were derived for defective single-walled carbon nanotubes (SWCNTs) with randomly and uniformly distributed defects or quenching sites. Asymptotic analysis of the exact…
The main purpose of modelling the yarn structure is to find relations that are more reliable giving the behaviour of the yarn starting from its components. In this paper, the identification of the mechanical behaviour of the elastic core spun yarns by a rheological modelling on the basis of pre-existent phenomenologic…
Abstract An unprecedented solvothermal treatment of triangular molybdenum oxo clusters K 2 [Mo 3 O 4 (Hnta) 3 ] ( 1 , nta = nitrilotriacetate) and H 2 bipy[Mo 3 O 4 (C 2 O 4 ) 3 (H 2 O) 3 ] ( 2 , bipy = 4,4′‐bipyridine) was successfully established to prepare a series of new oligonuclear Mo(IV–VI) oxo clusters 3 – 5 .…
The effect of compounding procedure on morphology and crystallization behavior of isotactic polypropylene/high‐density polyethylene/carbon black (iPP/HDPE/CB) composite was investigated. iPP/HDPE/CB composites were prepared by four compounding procedures (A: iPP + HDPE + CB; B: iPP/HDPE + CB; C: HDPE/CB + iPP; D: iPP/…
An outstanding question in the physics of jammed packings concerns the nature of the correlations that arise near the unjamming transition. In this work, we study unjamming in an assembly of frictionless grains that are hard but not infinitely rigid. We demonstrate that a static correlation function, which probes sens…
Aims: Improvements in nanotechnology in the past decayed has created various opportunities for evaluation of biologic effects such as anti-bacterial effects of nanoparticles. The purpose of this study was to evaluate the antibacterial activity of calcium carbonate nanoparticles on two different bacteria including A gr…
Jute fabric-reinforced natural rubber (NR) based composites were produced by compression molding. Tensile strength (TS), tensile modulus (TM), elongation at break (Eb) bending strength (BS), bending modulus (BM), and softness of the composite were 30 MPa, 395 MPa, 65%, 10 MPa, 2130 MPa, and 79 Shore-A, respectively. D…
The crystal structures of three ternary Ni-Zn borides have been elucidated by means of X-ray single-crystal diffraction (XSC) and X-ray powder diffraction techniques (XPD) in combination with electron microprobe analyses (EMPA) defining the Ni/Zn ratio. Ni(21)Zn(2)B(24) crystallizes in a unique structure type (space g…
We theoretically calculate the charge-supercurrent through a ballistic graphene junction where superconductivity is induced via the proximity-effect. Both monolayer and bilayer graphene are considered, including the possibility of strain in the systems. We demonstrate that the supercurrent at the charge neutrality poi…
Abstract In order to enhance the grafting efficiency of graft copolymerization of granular cornstarch with acrylic acid (AA) for improving the adhesion and film properties of starch‐ g ‐poly(acrylic acid) used as sizing agent, the esterification of hydrolyzed starch with acryloyl chloride was applied before graft copo…