Materials Literature
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Tb 3+ - and Eu 3+ -doped lanthanum oxysulfide nanocrystals (NCs) with homogeneous grain size have been prepared by a gel-network coprecipitation method using gelatin as the template and ammonium sulfate as the sulfurizing agent and a following reduction process at relatively low temperatures (750 °C) in a H 2 atmosphe…
The noise properties of single-walled carbon nanotube transistors (SWNT-FETs) are essential for the performance of electronic circuits and sensors. Here, we investigate the mechanism responsible for the low-frequency noise in liquid-gated SWNT-FETs and its scaling with the length of the nanotube channel down to the na…
Nanoscale constraint is known to have a significant impact on the thermal properties of materials. Although thermosetting resins have been cured in the presence of nanoparticles and nanotubes, cure of thermosetting resins under the well-defined nanoscale constraints imposed by controlled pore glass (CPG) or similar ma…
An amphiphilic pyrene derivative (PyDNH3) bearing positively charged ammonium cations has been synthesized and characterized. Self-assembly of PyDNH3 in the presence of chiral tryptophan derivatives was investigated in ethanol/water by optical and chiroptical spectra, indicating the formation of helical aggregates. Sc…
In the experiments described in this paper, micromachined silicon post surfaces were coated with thin films of a polymer for which the contact angle on the smooth material was around 70 degrees . Drops wetted these surfaces in the Wenzel or "penetration" mode. We have determined the advancing and receding angles as a…
The formation of CO2 in the gas phase and on a polyaromatic hydrocarbon surface (coronene) via three possible pathways is investigated with density functional theory. Calculations show that the coronene surface catalyses the formation of CO2 on model grain surfaces. The addition of O-3 to CO is activated by 2530 K in…
We present a study of photoconductivity in close-packed films of CdSe/ZnS core/shell nanocrystals, from which the majority of the organic ligands are removed. The ZnS inorganic shells separate the CdSe cores, and passivate the surface of the CdSe nanocrystals, slowing the nonradiative exciton decay rate. These films r…
Abstract Tissue engineering scaffolds require a controlled pore size and structure to host tissue formation from cell populations. Supercritical carbon dioxide (scCO 2 ) processing can be used to form porous scaffolds in which the escape of CO 2 from a plasticized polymer melt generates gas bubbles that shape the pore…
Au−Pd nanoparticles supported on a variety of oxides are known to be highly active catalysts for a number of interesting reactions, including the direct synthesis of H 2 O 2 from H 2 and O 2 . A systematic series of Au−Pd/Al 2 O 3 catalysts, subjected to a variety of heat treatments, have been examined by STEM-XEDS an…
PolyHIPE are highly porous, open-pore, cross-linked polymers synthesized within high internal phase emulsions (HIPE). Biodegradable polycaprolactone (PCL) oligomers were incorporated into polyHIPE using two approaches. The first approach involved copolymerization with a vinyl-terminated PCL (PCL-VL). This approach yie…
Molecular dynamics simulations have been performed with two reactive force fields to investigate the structure of a Pt100 cluster adsorbed on the three distinct sides of a carbon platelet. A revised Reax force field for the carbon-platinum system is presented. In the simulations, carbon platelet edges both with and wi…
We report on the facile preparation of biomass waste-derived microporous carbons and the investigation of their hydrogen storage performance. By adjusting the reaction parameters, different carbon materials with controlled morphology and texture were prepared through the carbonization and activation of the hydrolytic…
Single-walled carbon nanotubes (SWCNTs) functionalized by metals have great potential for applications in hydrogen storage, chemical sensors, and nanodevices. Because the exterior of single-walled silicon carbide (SiC) nanotubes has a higher reactivity than that of SWCNTs, it is highly desirable to investigate the fun…
One of the major concerns for the feasibility of phase-change memories is the reduction of the programming current. To this aim, several efforts have been dedicated both on cell geometry and on material engineering. This paper addresses programming-current minimization by the optimization of the cell geometry and mate…
In this letter, we demonstrate a gate-all-around single-wall carbon nanotube field-effect transistor. This is the first successful experimental implementation of an off-chip gate and gate-dielectric assembly with subsequent deposition on a suitable substrate. The fabrication process and device measurements are discuss…
A realistic model, consisting of six-layer slabs, and density-functional calculations were used to perform a detailed analysis of the structural and electronic properties of N doped TiO 2 (110). All the positions examined for adsorption of atomic N are unstable regarding the formation and further escape of N 2 (g). Th…
In order to disclose the dominant interfacial interaction between amino acids and ordered mesoporous materials, the adsorption behaviors of five amino acids on four mesoporous materials were investigated in aqueous solutions with adjustable amino acid concentration, ion strength, and pH. The selected amino acids were…
Well-oriented thin films of methyl-ammonium trihalogenostannates $\mathrm{C}{\mathrm{H}}_{3}\mathrm{N}{\mathrm{H}}_{3}\mathrm{Sn}{X}_{3}$ compounds $(X=\mathrm{Cl},\mathrm{Br})$ are grown by the single source thermal ablation technique. Optical absorption and structural analysis of $\mathrm{C}{\mathrm{H}}_{3}\mathrm{N…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTHigh Molecular Weight Polymethacrylates by AGET ATRP under High PressurePiotr Kwiatkowski, Janusz Jurczak, Joanna Pietrasik, Wojciech Jakubowski, Laura Mueller, and Krzysztof MatyjaszewskiView Author Information Institute of Organic…
Ordered porous metal nanomaterials have current and future potential applications, for example, as catalysts, as photonic crystals, as sensors, as porous electrodes, as substrates for surface-enhanced Raman scattering (SERS), in separation technology, and in other emerging nanotechnologies. Methods for creating such m…