Materials Literature
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Si nanocrystals (Si nc) were formed by the implantation of Si + into a SiO 2 film on (100) Si, followed by high-temperature annealing. The microstructure of the Si nc produced by a high-dose (3 × 10 17 cm -2 ) implantation has been extensively investigated using high-resolution transmission electron microscopy (HRTEM)…
It had been demonstrated that large-scale honeycomb-like nanoparticle arrays could be fabricated inexpensively by the process of monolayer nanosphere self-assembly. Here we report that a double-layer masking procedure can be effectively used to overcome the restriction of honeycomb order in an array resulted from a mo…
We show by means of experiments, theory, and simulations that the slow dynamics of coarsening systems displays dynamic heterogeneity similar to that observed in glass-forming systems. We measure dynamic heterogeneity via novel multipoint functions which quantify the emergence of dynamic, as opposed to static, correlat…
Abstract A new class of linear unsaturated polyphosphate esters based on divanillylidene cyclohexanone possessing liquid crystalline‐cum‐photocrosslinkable properties have been synthesized from 2,6‐bis[ n ‐hydroxyalkyloxy(vanillylidene)]cyclohexanone [n = 6,8,10] with various alkyl/aryl phosphorodichloridates in chlor…
Nanomaterials have attracted considerable interest with numerous technological developments in the last decade. Nanomaterials exhibit different physicochemical properties compared with their bulk counterparts because the diameters of the nanoparticles are less than the Bohr exciton radius. Cerium oxide based materials…
Abstract Summary: Film samples of low‐density polyethylene (LDPE) and biaxially oriented poly(propylene) (BOPP) were surface modified by vacuum ultraviolet (VUV) irradiation using a Kr resonant lamp at λ = 123.6 nm in low‐pressure ammonia gas, and were then stored in air. The time‐dependence of the surface properties…
The photoinduced isotropic state of liquid crystalline azobenzenes exhibits one of the strongest nonlinear optical refraction known for isotropic materials. The optical nonlinearity of these materials is large in a wide band of the visible spectrum and is accompanied with high, over 90%, transmission for red wavelengt…
Abstract The kinetics of crystallization of poly(propylene terephthalate) (PPT) samples of different molecular weights were studied under both isothermal and nonisothermal conditions. The Avrami and Lauritzen–Hoffmann treatments were applied to evaluate kinetic parameters of PPT isothermal crystallization. It was foun…
We propose that electron doped nontransition metal phthalocyanines such as ZnPc and MgPc, similar to those very recently reported, should constitute novel strongly correlated metals. Because of orbital degeneracy, Jahn-Teller coupling, and Hund's rule exchange, and with a large on-site Coulomb repulsion, these molecul…
Isothermal compressibilities and Brillouin sound velocities from the literature allow us to separate the compressibility at the glass transition into a high-frequency vibrational and a low-frequency relaxational part. Their ratio shows the linear fragility relation discovered by x-ray Brillouin scattering, though the…
Ti-doped NaAlH 4 can be directly prepared by mechanical milling a 1:1 mixture of NaH and Al together with a few mole percent of off-the-shelf metallic Ti powder under an argon or hydrogen atmosphere. The hydrogen storage materials that are produced through this process exhibit stable hydrogen capacities through 10 cyc…
The heats of adsorption of two linear CO species adsorbed on the Au degrees particles (denoted L(Au degrees)) and on the Ti(+delta) sites (denoted L(Ti+delta)) of a 1% Au/TiO(2) catalyst are determined as the function of their respective coverage by using the AEIR procedure (adsorption equilibrium infrared spectroscop…
Pulsed laser deposited, orthogonally overlapping metal film gradients are introduced as a versatile method to optimize desired nanomaterial characteristics simultaneously as a function of catalyst composition and film thickness. Catalyst libraries generated by this method are applied here to study the growth of vertic…
The local density approximation and a range of nonhybrid gradient corrected density functionals (PW91, BLYP, PBE, revPBE, RPBE) have been assessed with respect to the prediction of geometries and spin-state energy preferences for a range of homoleptic Fe(II)L6 and Fe(III)L6 complexes, where L = Cl-, CN-, NH3, pyridine…
A series of layered calcium organosilicate hybrids containing covalently linked organic functionalities was synthesized by a sol−gel process from the reaction of calcium salt and organotrialkoxysilane with alkyl (from methyl to octadecyl) and phenyl functionalities in an aqueous/ethanolic basic solution at room temper…
The first major scientific study of diamond polishing was by Tolkowsky. His model dominated until recent years, when high–resolution microscopes allowed detailed studies of polished diamond surfaces. In this paper, new research shows that diamond polishing involves two– and three–body wear processes. The third body co…
1841-1844
Force-constant and positional disorder have been introduced into diamond lattice models in an attempt to mimic the vibrational properties of a realistic amorphous silicon model. Neither type of disorder is sufficient on its own to mimic the realistic model. By comparing the spectral densities of these models, it is sh…
A new class of potential magnetic resonance imaging contrast agents with nanosized mesoporous silica as the metal carrier is reported. Gadolinium-incorporated mesoporous silicas were synthesized by using long-chain surfactant as a template. The products were characterized with X-ray powder diffraction, nitrogen adsorp…
Biotinylated gold nanoparticles were prepared by using a two-step surface modification procedure. First, a carboxyl-terminated alkanethiol was chemisorbed onto the surface of gold nanoparticles in the presence of a stabilizing agent. Subsequently, the carboxyl groups were reacted with (+)-biotinyl-3,6,9,-trioxaundecan…