Materials Literature
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Porous carbons with large meso/macropore surface areas were prepared by the colloidal-crystal-templating technique. The porous carbons exibited extremely high specific electrochemical double layer (EDL) capacitance of 200−350 F g -1 in an aqueous electrolyte (1 M H 2 SO 4 ). The pore structure dependence of the capaci…
Layered perovskite La2CuO4+delta(LCO) thin films were epitaxially grown on SrTiO3 (STO) and LaSrAlO4 (LSAO) substrates by atomic-layer-by-layer molecular beam epitaxy. The lattice de-fects and residual strain in these films were investigated by means of transmission electron mi-croscopy and electron energy loss spectr…
Abstract Polymer brushes have recently emerged as an extremely versatile way to modify surface properties in a robust and controlled way. The introduction of responsive polymers and block copolymers in polymer‐brush systems has also opened up new routes to ‘smart' surfaces with switchable surface properties. Here, the…
Layer-by-layer (LbL) assembly is a powerful means for fabricating multilayer thin films with controlled architecture and composition. This feature article discusses different types of methods for LbL assembly. On the one hand, some of the conventional LbL methods are introduced, which are driven by electrostatic inter…
Abstract Summary: More than twenty years have passed since we invented PCN, in which only a few wt.‐% of silicate is randomly and homogeneously dispersed in the polymer matrix. When molded, these nanocomposites show superior properties compared to those of pristine polymers. The number of papers on PCN has increased r…
In this paper, current-time transient (CTT) forms associated with the two remaining models of two-phase growth are identified. The first model represents a scenario in which growth centers associated with the phase with the higher outward growth rate are conically shaped, while the shape of the remaining growth center…
This study is an attempt to prepare proton-conducting glasses based on heteropolyacids for the fuel cell application. The phosphomolybdic acid (PMA)-containing glass membranes were characterized by thermogravimetry/differential thermal analysis, -adsorption-desorption analysis, and impedance measurements. Thermogravim…
Abstract Novel sulfur‐containing biphenol monomers were prepared in high yields by the reaction of 4‐mercaptophenol with chloropyridazine or chlorophthalazine compounds. High‐molecular‐weight poly(arylene ether)s were synthesized by a nucleophilic substitution reaction between these sulfur‐containing monomers and acti…
Amplified spontaneous emission (ASE) characteristics of a blue dye coumarin 151 encapsulated in a highly ordered mesoporous SBA-15 were studied. The spectra narrowing was observed and found that the threshold and loss were greatly reduced, and the gain is significantly increased compared with spin-coated coumarin 151…
Catalytic Reduction of 4 , 4 ′ -(2,2,2-Trichloroethane-1,1-diyl)bis(chlorobenzene) with Cobalt(I) Salen Electrogenerated at Vitreous Carbon Cathodes in Dimethylformamide, Gach, Philip C., Mubarak, Mohammad S., Karty, Jonathan A., Peters, Dennis G.
Ultralow- integration issues for node and below is a major challenge. Pore creation was studied vs the matrix film cross-linking. After curing at low temperature some bumps were found dispersed at the top of the film surface. The porosity could be changed by varying the porogen loadings and curing program ramp. At hig…
The microstructure and in-plane dielectric and ferroelectric properties of highly oriented Ba0.7Sr0.3TiO3 (BST) thin film grown on MgAl2O4 (001) single-crystal substrate through pulsed laser deposition were investigated. X-ray diffraction measurements indicated that BST had a distorted lattice with a tetragonality a∕c…
The hole transport properties of nitrogen doped p-type ZnO grown on c-plane sapphire (c-Al2O3) were investigated by temperature-dependent Hall-effect measurements. The experimental Hall mobility was found to be considerably lower than the calculated mobility including ionized impurity scattering, acoustic-mode deforma…
1. Microstructural analysis 2. Symmetry 3. Miller-Bravais system 4. Stereographic projection 5. Crystal defects 6. Phase diagrams 7. Free energy basis for phase diagrams 8. Ordering of solid solutions 9. Diffusion 10. Freezing 11. Phase transformations 12. Surfaces 13. Bonding 14. Sintering 15. Amorphous materials 16.…
The authors demonstrate a tunable single photonic defect-mode in a single cholesteric liquid crystal material based on a structural defect introduced by local modification of the helix. An unpolymerized region of cholesteric liquid crystal acting as the defect was left between two polymerized regions via a two-photon…
Surface-enhanced Raman scattering (SERS) substrates were obtained through silver reduction on and by nanostructured Si films. The absence of any chemical agents on the Ag nanoparticle surfaces allows analyte adsorption and SERS detection immediately with spotting. These SERS substrates have the further unique and usef…
Fe ∕ Pt multilayered nanowires with well-defined interfaces and layer thicknesses were fabricated by a pulse-plating technique in nanoporous anodic alumina templates. The structure, surface morphology, and magnetic properties of the multilayered nanowire arrays have been characterized by x-ray diffractometer, field em…
In situ observations of pitting corrosion as it spreads across the surface of stainless steel were carried out. We apply two different imaging methods simultaneously, viz., ellipsomicroscopy for visualizing changes of surface film properties and contrast-enhanced microscopy for monitoring nucleation and reactivation o…
The authors introduce dopants in vertically grown single crystalline ZnO nanowires in a controlled manner. A section of the nanowires is doped with aluminum as donor during crystal nucleation, resulting in n-n+ junction. Current-voltage characteristics of these single nanowire junctions via scanning tunneling microsco…
We examine the effect of different anions in solutions containing benzotriazole (BTA) on the Cu removal rate during chemical mechanical planarization (CMP). In solutions containing both and BTA, the Cu removal rate is nearly a factor of twenty lower than in solutions containing either or BTA alone. As-grown BTA films…