Materials Literature
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A silica nanoparticle has been successfully employed as a nanoscaffold to self-organize porphyrin and C60 molecules on a nanostructured SnO2 electrode. The quenching of the porphyrin excited singlet state on the silica nanoparticle is suppressed significantly, showing that silica nanoparticles are promising scaffolds…
Abstract A series of novel poly(amine amide)s ( IIa – IIl ) with pendent N ‐carbazolylphenyl units having inherent viscosities of 0.25–1.06 dL/g were prepared via direct phosphorylation polycondensation from various dicarboxylic acids and a carbazole‐based aromatic diamine. Except for poly(amine amide) IIc , derived f…
The adsorption and thermal desorption of Zn and ZnO on Pd(111) was studied in the temperature range between 300 and 1300 K with TDS, LEED, and CO adsorption measurements. At temperatures below 400 K, multilayer growth of Zn metal on the Pd(111) surface takes place. At a coverage of 0.75 ML of Zn, a p(2 x 2)-3Zn LEED s…
Reported are three adults who developed frequent episodes of a complex neurologic syndrome years after radiation therapy for a brain tumor. MRI and [(18)F]fluorodeoxyglucose PET performed during the episodes demonstrated dramatic gyral thickening with enhancement and intense hypermetabolism in symptomatic regions that…
The anomalous Hall effect has been studied for single crystals of ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{Co}{\mathrm{O}}_{3}$ $(0.17\ensuremath{\leqslant}x\ensuremath{\leqslant}0.30)$. The Hall conductivity for $x=0.3$ is proportional to the magnetization, which is consistent with the Kaplus-Lutting…
Self-assembled nanotubes and helical aggregates are ubiquitous in nature, making them attractive targets for nanometer-scale fabrication. The effect of counterions (NH4+ vs. Na+) on the formation of self-assembled ammonium lithocholate (NH4LC) nanotubes in alkaline aqueous solutions is reported. A spectacular enhancem…
Abstract Pyriporphyrin 1 (6,11,16,21‐tetraaryl‐22‐aza‐ m ‐benziporphyrin), the simplest homologue of 5,10,15,20‐tetraarylporphyrin can be constructed by replacement of one of the pyrrole rings of 5,10,15,20‐tetraarylporphyrin with a pyridine moiety, linked to the macrocycle through α,α′‐carbon atoms. (© Wiley‐VCH Verl…
A facile in situ replacement reaction route was successfully introduced for synthesizing Ag nanoshells with outer diameters of 40-50 nm and inner diameters of 20-30 nm using Co nanoparticles as sacrificial templates. The products were characterized by XRD, TEM, SAED, and UV-vis absorption spectra. The formation mechan…
Highly crystallized mesoporous TiO 2 thin films with enhanced photocatalytic activity were synthesized via a substrate-assisted strategy. Three types of substrates, namely, amorphous glass, polycrystalline Pt, and single-crystal Si(111) wafer, were employed to study their effects on the structure of TiO 2 films, by us…
[(ttpy)Os(tpy-ph-TPH(3)(+))](3+) (2), [(ttpy)Os(tpy-xy-TPH(3)(+))](3+) (3), [(ttpy)Os(tpy-ph-TPH(2)(NO(2))(+))](3+) (4), and [(ttpy)Os(tpy-xy-TPH(2)(NO(2))(+))](3+) (5) are a series of dyads made of an Os(II) bis-tpy complex (tpy = 2,2':6',2"-terpyridine) as the photosensitizer (P) and 2,4,6-triarylpyridinium group (T…
Novel rod-shaped calcite crystals are formed by precipitation from cetyltrimethylammonium bromide (CTAB)/1-pentanol/cyclohexane microemulsions containing calcium chloride and ammonium carbonate. The calcium carbonate initially precipitates as hexagon-shaped vaterite crystals. The vaterite crystals transform to unusual…
The realization of spin-based devices requires high density, ordered arrays of magnetic materials with a high degree of spin polarization at surfaces. We have synthesized, for the first time, highly spin polarized complex magnetic oxide nanostructures embedded in a paramagnetic matrix by electron beam lithography and…
The transmittance in fringe-field switching liquid crystal (LC) displays, which show a wide viewing angle, is dependent on the position along the electrode position. The reason for this is that the dielectric torque (and hence the twist angle) varies with position. This effect depends on the type of LC: a display usin…
We report a simple and efficient chemical vapor deposition (CVD) process that can grow oriented and long single-walled carbon nanotubes (SWNTs) using a cobalt ultrathin film ( approximately 1 nm) as the catalyst and ethanol as carbon feedstock. In the process, millimeter- to centimeter-long, oriented and high-quality…
“Seeing” oxygen and carbon dioxide: A sensor material is described that enables simultaneous imaging and monitoring of carbon dioxide and oxygen (see figure). It relies on the measurement of the phase shift of the luminescence decay time of a material composed of microbead-contained indicators (with well-separated exc…
Acrylonitrile butadiene rubber compounds filled with different concentrations of fast extrusion furnace (FEF) carbon black were experimentally investigated. The stress–strain curves of the composites were studied, which suggest good filler–matrix adhesion. The large reinforcement effect of the filler followed the Guth…
A three-channel transmission line (TL) impedance model is proposed to address the charge transport behavior of molecular functionalized mesoscopic oxide electrodes at different bias conditions. A full general solution of the three-channel TL for the system is provided in this paper. Selected experimental results of im…
Hollow microcapsules composed of the weak polyelectrolytes poly(allylamine hydrochloride) (PAH) and poly(methacrylic acid) (PMA) are templated on silicon oxide particles using the layer-by-layer adsorption. The colloidal template is removed with a buffer system of hydrofluoric acid and ammonium fluoride. With this buf…
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Achieved negative differential resistance behavior of Si/B-substituted into a C 6 chain sandwiched between capped carbon nanotube junctions ,