Materials Literature
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After decomposition of thiourea (TU) in the presence of various metal cations to form metal sulfide nanoclusters, an autocatalytic reaction between TU and the surface of the as-formed metal sulfide dominates the further growth of these metal sulfide nanoclusters. This autocatalytic surface growth is self-correcting, l…
Recently, Kolboe and Svelle pointed out that second-order Møller-Plesset perturbation theory (MP2) incorrectly predicts a barrierless reaction of the benzenium-ethene complex to the ethyl-1H-benzene cation in contrast to other considered quantum chemical methods [J. Phys. Chem. A 2008, 112, 6399]. In a subsequent Lett…
Dendritic polystyrene with hydroxyl functional groups at each branch point was synthesized using convergent living anionic polymerization. The polymer samples were formed by the slow addition of a 1/10 molar mixture of 4-vinylstyrene oxide/styrene to living polystyryllithium chains in a benzene/THF solution. The 4-vin…
We report measurements of the de Haas-van Alphen (dHvA) oscillation and a band structure calculation for the pnictide superconductor BaNi$_2$P$_2$, which is isostructural to BaFe$_2$As$_2$, the mother compound of the iron-pnictide high-$T_c$ superconductor (Ba$_{1-x}$K$_x$)Fe$_2$As$_2$. Six dHvA-frequency branches wit…
Single-walled carbon nanotubes (SWCNTs) sonicated in o -dichlorobenzene and benzyl chloride show anomalous behavior when characterized with a Raman microscope and ultraviolet−visible−near-infrared spectroscopy. SWCNTs treated with the aforementioned solvents lead to a small but distinct increase in the Raman D peak, w…
We report on the fabrication of very large-area organic single crystalline thin films on amorphous hydrophilic CN- and OH-modified substrates for electro-optic applications. The phenolic configurationally locked polyene (CLP) crystals having large macroscopic nonlinearity and an electro-optic coefficient of r 333 = 52…
The high-transition-temperature (high-Tc) superconductivity discovered recently in iron pnictides is analyzed within a perturbation theory. Specifically, the probable pairing symmetry, the doping dependence of the transition temperature and the pairing mechanism are studied by solving the Eliashberg equation for multi…
The adsorption of NO molecules on Pd(n) clusters of varying size (n=1-6) located in the main channel of mordenite and the interaction of the metallic clusters with the zeolitic framework were investigated using ab initio density-functional calculations under periodic boundary conditions. The supported clusters are cre…
The influence of the temperature during self-assembled growth of BiFeO 3 −CoFe 2 O 4 columnar nanocomposites on (001) and (111) oriented SrTiO 3 substrates has been investigated aiming to control pillar size and lateral ordering. The dramatic influence of the growth temperature on the nanoobject morphology is found to…
Abstract High‐speed, in situ video microscopy is a promising technology for measuring critical solid‐phase properties in suspension crystallization processes. This paper demonstrates the feasibility of high‐resolution, video‐imaging‐based particle size distribution (PSD) measurement by applying image analysis and stat…
Well-organized periodic mesoporous organosilica thin films (designated as PMO-SBA15), having covalently bonded perylene-bridged silesquioxane (PTCDBS) inside their pore channels, are successfully synthesized via sol-gel self-assembly of 1,2-bis(triethoxysilyl)ethane and perylene-bridged silsesquioxane, using micelles…
While optics is one of our oldest scientific tools, enabling some of the earliest advances in astronomy and biology, it is also currently one of the most dynamic and exciting areas of applied science. Developments of the past two decades in nanoscale device fabrication, nanomaterials synthesis and patterning, and adva…
We have used atomistic molecular dynamics simulations to study the molecular-scale structure of poly( l -lysine) dendrimers homogeneously functionalized with naphthalene disulfonate caps from the first generation to the sixth generation. These dendrimers behave as typical dendrimers in poor solvent. As the generation…
When particles adsorb at a fluid/fluid interface at a sufficiently high concentration, the interface loses mobility and displays solidlike characteristics, a phenomenon called "interfacial jamming". Jamming can arrest interfacial tension-driven morphological coarsening in liquid/liquid or gas/liquid systems and theref…
SiO 2, TiO 2, γ-Al 2 O 3, and HY zeolite supported phosphide catalysts were prepared by the hydrogen temperature-programmed reduction method from phosphate precursors. The physicochemical properties of the catalysts were characterized by means of N 2 adsorption−desorption, hydrogen temperature-programmed reduction, X-…
Ab initio molecular dynamics calculations, combined with a simulated annealing approach, were undertaken to study reconstructions in boehmite surfaces and nanorods. Our calculations indicate significant reconstruction for the (101) boehmite surface, leading to dramatic changes on the surface geometry and to higher coo…
Sb(2)Te(3) and Bi(2)Te(2)Se semiconductor materials were used as the source and drain contact materials in the fabrication of carbon nanotube field-effect transistors (CNTFETs). Ultra-purified single-walled carbon nanotubes (SWCNTs) were ultrasonically dispersed in N-methyl pyrrolidone solvent. Dielectrophoresis was u…
Nanosized surface topography on an implant material has the capability of stimulating the acceptance of the material in its host surrounding. Fine-tuning of nanotopography feature size has been shown to trigger differentiation of mesenchymal stem cells into bone cells in vitro. For this purpose we have created well de…
The structural and chemical properties of Cu- and Co-exchanged silicoaluminophosphates with a chabazite-type structure (SAPO-34) and the adsorption of NO molecules on the extraframework cations have been studied using periodic density functional (DFT) calculations using both convential gradient-corrected exchange-corr…
Nanocomposites were prepared by melt blending a series of sodium ionomers formed from poly(ethylene- co -methacrylic acid) and the M 2 (HT) 2 organoclay. The effects of the degree of neutralization of the acid groups on the morphology and properties of the nanocomposites were evaluated using stress−strain analysis, wi…