Materials Literature
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We report the results of our investigation on protonic conduction in 1 μm-thick polycrystalline films of 8 mol% yttria-stabilized zirconia (YSZ) with an average grain size of 17 nm prepared on sapphire substrate using a spin-coating process. Protonic conductivity of the films is found to be higher by over an order of…
[(NH(3))(2)BH(2)](+)[BH(4)](-) is formed from the room temperature decomposition of NH(4)(+)BH(4)(-), via a NH(3)BH(3) intermediate. Its crystal structure has been determined and contains disordered BH(4)(-) ions in 2 distinct sites. Hydrogen release is similar to that from NH(3)BH(3) but with faster kinetics.
Novel materials based on nanotechnology creating nontraditional ablators are rapidly changing the technology base for thermal protection systems. Formulations with the addition of nanoclays and carbon nanofibers in a neat thermoplastic polyurethane elastomer (TPU) were melt‐compounded using twin‐screw extrusion. The T…
A versatile approach has been developed using plasma polymerization to fabricate functional Janus particles. A brominated plasma polymer is toposelectively deposited on a monolayer of silica microparticles, endowing the particles with a chemically reactive polymeric and silica hemisphere.
Complexes [M(II)Gd(III){pyCO(OEt)pyC(OH)(OEt)py}₃](ClO₄)₂·EtOH [M(II) = Cu(II) (1), Mn(II) (2), Ni(II) (3), Co(II) (4) and Zn(II) (5)] crystallize in the monoclinic Cc space group and contain one hexacoordinate M(II) ion and one enneacoordinate Gd(III) ion, bridged by three {pyCO(OEt)pyC(OH)(OEt)py}⁻ ligands. Magnetic…
Functionalization of carbon nanotubes is essential for achieving their mechanical, electrical, and biological functions and enhancing their dispersion in a polymer matrix. Cycloaddition reactions can play a significant role as an emerging route in this direction. This minireview focuses on covalent functionalization o…
Arrays of oriented polyaniline (PANI) nanostructures of different shape and size were fabricated on transparent ITO substrates using block copolymer nanotemplate as scaffold material. Polyaniline in these nanostructures was synthesized by electropolymerization. The electrochemical deposition requires only a single ste…
GdF 3 :Eu 3+ nanophosphors with hexagonal or orthorhombic structure have been succeeded to be selectively synthesized at room temperature for the first time via a simple soft chemical route. The structure and morphology of GdF 3 :Eu 3+ nanophosphors were controlled by using different fluoride precursors. Hexagonal GdF…
A double ultrasonic source has been shown to dramatically increase dispersion efficiency of carbon nanotubes. Thermal measurements of dispersing fluid only show temperature rises commensurate with the power levels of the two ultrasonic sources; which is validated by predictions of statistical energy analysis (SEA) bas…
In this study, multifunctional alkaline pulping was suggested to produce different pulp grades at one mill site, ranging from high-yield paper pulp to high-purity dissolving pulp. In all process modifications, sulfur was successfully replaced by anthraquinone. Autohydrolysis and alkaline pre-extraction were applied to…
The synthesis and bioactivity of zinc nanoparticles has been extensively studied. However, the antibacterial activity of zinc nanoparticles individually or in combination with different antibiotics has not been demonstrated. In the present study the .effect of zinc nano particles on the antibacterial activity of diffe…
BACKGROUND: Aluminum-made settings are widely used in healthcare, schools, public facilities and transit systems. Frequently-touched surfaces of those settings are likely to harbour bacteria and be a potential source of infection. One method to utilize the effectiveness of copper (Cu) in eliminating pathogens for thes…
A study has been made as a function of temperature of the phase transformation of water and ice in two samples of mesoporous silica gel with pore diameters of approximately 50 A. One sample was modified by coating with a layer of trimethylchlorosilane, giving a predominantly hydrophobic internal surface, whereas the u…
We synthesized Na(2)[B(12)H(12)] by a solid state procedure and thermal decomposition of Na[B(3)H(8)], and calculated from a first-principles approach the thermodynamic and structural properties. In particular, the calculated enthalpy of formation of the monoclinic structure, at T = 0 K, of -1086.196 kJ mol(-1) showed…
A series of partly fluorinated polyelectrolytes were synthesized by transition metal mediated living radical polymerization and evaluated for their applicability as corona-forming components in 19F MRI-detectable nanoparticles in aqueous solutions. The polymers were statistical and block copolymers of trifluoroethyl m…
A series of symmetrical and unsymmetrical N,N-dialkyldithiocarbamatolead(II) complexes with the general formula [Pb(S2CNRR2)2] where R1 = Me, R2 = benzyl (1), R1 = Me, R2 = heptyl (2), R1 = Me, R2 = octadecyl (3), R1 = R2 = dioctyl (4), R1 = Me, R2 = Hex (5), R1 = Me, R2 = Me (6), R1 = Et, R2 = Et (7), R1 = nPr, and R…
One-dimensional (1D) hexagonal-phase NaYF4 with various morphologies including nanowires, nanowire bundles, submicrorods, and hexagonal microprisms have been selectively synthesized via a facile complexing reagent-surfactant-assisted hydrothermal route. The effects of reaction temperature, the amount of SDBS (sodium d…
Ab initio total-energy calculations and X-ray diffraction measurements have been combined to study the phase stability of zirconate pyrochlores (A(2)Zr(2)O(7); A = La, Nd and Sm) under pressures up to 50 GPa. Phase transformations to the defect-cotunnite structure are theoretically predicted at pressures of 22, 20 and…
Ceria nanowires were synthesized on a large scale by a simple, efficient, and environmentally benign strategy using supercritical (SC) CO2 expanded ethanol as reaction medium. Morphological characterization by SEM and TEM showed that most of the nanowires were bundles composed of individuals oriented parallel to each…
Five novel heteropolyanions have been synthesized and characterized by IR, UV-vis, XPS spectroscopy, XRD, and elemental analyses. Single-crystal X-ray diffraction analyses reveal that these five compounds represent novel examples of compounds based on the combination of polyoxometalates, transition metal coordination…