Materials Literature
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We report the immobilization of gold nanorods onto self-assembled monolayers (SAMs) of 16-mercaptohexadecanoic acid (16-MHA). The simple two step protocol involves formation of a SAM of 16-MHA molecules onto gold-coated glass slides and subsequent immersion of these slides into the gold nanorod solution. The nanorods,…
This letter introduces ab initio study of the full activation-volume tensor of crystalline defects as a means to make contact with mechanical response experiments. We present a theoretical framework for prediction of the internal friction associated with divacancy defects and give the first ab initio value for this qu…
"Stealth" nanoparticles made from polymer micelles have been widely explored as drug carriers for targeted drug delivery. High stability (i.e., low critical micelle concentration (CMC)) is required for their intravenous applications. Herein, we present a "core-surface cross-linking" concept to greatly enhance nanopart…
The anisotropically phase-segregated CoPd sulfide nanoparticles, named "CoPd nanoacorns", were spontaneously generated by reducing the corresponding metal precursors with 1,2-hexadecanediol in the presence of various alkanethiols. The CoPd nanoacorn consisting of crystalline Co9S8 and amorphous PdSx phases with the Co…
We analyze the scaling of the crack roughness and of avalanche precursors in the two dimensional random fuse model by numerical simulations, employing large system sizes and extensive sample averaging. We find that the crack roughness exhibits anomalous scaling, as recently observed in experiments. The roughness expon…
We use a matrix Boltzmann equation formalism to test the accuracy of Slonczewski's theory of spin-transfer torque in thin-film heterostructures where a non-magnetic spacer layer separates two non-collinear ferromagnetic layers connected to non-magnetic leads. When applicable, the model predictions for the torque as a…
We study the linear optical properties of helical cylindrical molecular aggregates accounting for the effects of static diagonal disorder. Absorption, linear dichroism, and circular dichroism spectra are presented, calculated using brute force numerical simulations and a modified version of the coherent potential appr…
We present a novel method for remote release of an encapsulated material from polyelectrolyte capsules based on laser light illumination. Two different components were introduced in the polyelectrolyte shells of PAH/PSS capsules-either Ag nanoparticles or IR dye-to induce absorption of light. Under laser illumination…
Triphenylene-based discotic liquid crystals, which have already been used commercially in phase compensation films to improve the viewing angle of liquid crystal display devices, also have application potential as one-dimensional charge carrier systems useful in electrical conduction, photoconduction, electroluminesce…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect Hydrocarbon Solid Oxide Fuel CellsSteven McIntosh and Raymond J. GorteView Author Information Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104 Cite this: Chem. Rev. 2004, 104, 10, 4845–4866Publication Da…
The small-molecule topology generator PRODRG is described, which takes input from existing coordinates or various two-dimensional formats and automatically generates coordinates and molecular topologies suitable for X-ray refinement of protein-ligand complexes. Test results are described for automatic generation of to…
Abstract For Abstract see ChemInform Abstract in Full Text.
Magnesium oxysulfate whiskers (5Mg(OH)2·MgSO4·3H2O) with a diameter of 0.5-1.0μm and a length of 30-50μm were synthesized via precipitation in room temperature followed with the hydrothermal reaction, using MgSO4 and NaOH as the raw materials. The experimental results indicate that the addition of magnesium hydroxide…
Ultracapacitors are promising components for energy storage, power backup and delivery systems. Our study examines the possible effects associated with gamma and proton irradiation in selected samples up to 1200 farad.
Low molecular weight poly(ethylene glycol) (PEG300) is examined as a possible environmentally benign replacement solvent for volatile organic solvents commonly used in crystallization and precipitation operations in pharmaceutical processing. It is shown to have solvating power comparable in magnitude to that of 2-pro…
H-montmorillonite was modified by interlayer surface silylation using 3-aminopropyltriethoxysilane and dodecylamine in ethanol without a pre-swelling step. Dodecylamine acts as a gallery expander and silylation catalyst. The evaporation of ethanol from the dispersion yields well-ordered silylated montmorillonites with…
Using first-principles total-energy methods, we calculate the formation energy for typical $\mathrm{Mn}$ defects in bulk $\mathrm{Si}$ and $\mathrm{Ge}$ and on (001) surfaces, from which the various $\mathrm{Mn}$ solubility limits are derived. Applying the theory for ultrahigh doping in semiconductors, we can understa…
Metallic nanoparticles of palladium and silver ranging in size from 1 to 15 nm were produced entirely within carbon dioxide by spraying a carbon dioxide carrier solution containing CO2-soluble metal precursors into a CO2 receiving solution containing a reducing agent (NaBH(OAc)3 or H2) and fluorocarbon thiol stabilizi…
Der größte bekannte Dy-Mn-Komplex ist [DyIII6MnIII4MnIV2(H2shi)4(Hshi)2(shi)10] (H3shi=Salicylhydroxamsäure; siehe Stereobild). Die Dysprosiumionen bilden einen nahezu planaren Sechsring, wobei zwei von ihnen durch MnIII2MnIV-Trimere überdacht sind. Diese Topologie bietet eine neue Strukturklasse, an der interessante…
The molecular structure of tin dibromide was investigated by high-level computational methods and gas-phase electron diffraction. The structural and vibrational characteristics of both SnBr 2 and Sn 2 Br 4 were determined by computations. To reach an agreement between computed and experimental bond lengths for SnBr 2,…