Materials Literature
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A simple, low-temperature strategy has been developed for the low-cost and large-area fabrication of ZnO nanoarrays on a zinc substrate by the natural oxidation of zinc metal in formamide/water mixtures. The one-step, wet-chemical approach has exhibited well-controlled growth of highly oriented and densely packed ZnO…
Abstract The photodynamic activities of a porphyrin-C60 dyad (P-C60) and its metal complex with Zn(II) (ZnP-C60) were compared with 5-(4-acetamidophenyl)-10,15,20-tris(4-methoxyphenyl)porphyrin (P), both in homogeneous medium-bearing photooxidizable substrates and in vitro on the Hep-2-human-larynx–carcinoma cell line…
Enlargement of the pi-electronic network of meso-meso, beta-beta, beta-beta triply linked diporphyrin has been exploited by preparing a corresponding dibenzo-fused porphyrin dimer that exhibits a perturbed absorption spectrum and a large two-photon absorption cross section.
Microorganisms frequently contaminate jet fuel and cause corrosion of fuel tank metals. In the past, jet fuel contaminants included a diverse group of bacteria and fungi. The most common contaminant was the fungus Hormoconis resinae. However, the jet fuel community has been altered by changes in the composition of the…
The easy synthesis of [Sb2W20O70{Ru(p-cymene)}2](10-) by the reaction between the organometallic precursor [Ru(p-cymene)Cl2]2 and [Sb2W20O70]14-, formed in situ, confirms the importance of the organometallic route to well defined ruthenium(+II)-substituted heteropolytungstates.
Clusters which display the rare cubic Fe8 topology have been obtained by reaction of the metastable hexavacant polyoxotungstate [H2P2W12O48]12- with basic trinuclear metal acetates.
The flow of crystalline solids at elevated temperatures is dependent upon creep mechanisms associated with the movement of dislocations, the relative displacements of adjacent grains and the stress-directed flow of vacancies. It is convenient to express the steady-state creep rate in terms of the dependences of these…
Multidrug resistance (MDR) is a major obstacle to successful clinical cancer chemotherapy. A novel doxorubicin anti-resistant Stealth liposomes (DARSLs), prepared by co-encapsulating doxorubicin (DOX) and verapamil (VER) into stealth liposomes, has been developed. The average particle size of DARSLs was 118.1+/-22.3 n…
The protonic-electronic mixed conductors are of great interest for their potential applications particularly for the hydrogen separation that is essential for hydrogen production from hydrocarbons. This paper deals with the mixed conduction properties of in which Ru is partially substituted for Ce in the high-temperat…
A nonvolatile 64-Mb 1T1R phase-transition random access memory (PRAM) has been developed by fully integrating chalcogenied storage material (GST: Ge/sub 2/Sb/sub 2/Te/sub 5/) into 0.18-/spl mu/m CMOS technology. To optimize SET/RESET distribution, 512-kb sub-array core architecture was proposed, featuring meshed groun…
Tinkering takes a fresh look at early automotive design from the bottom up, as a process that included manufacturers, engineers, designers, advice experts, and consumers, from savvy buyers to grass-roots inventors.
Journal URL: http://www.societyofglasstechnology.org.uk/cgi-bin/open.cgi?page=journal&sessionid=85597106; http://www.ingentaconnect.com/content/sgt/pcg; http://www.societyofglasstechnology.org.uk/cgi-bin/open.cgi?page=%20PC/PC-00a&sessionid=85597106
We demonstrate that guided resonant modes can be readily observed in asymmetrical photonic crystal slabs on high-index substrates. In spite of the high radiative loss associated with all optical modes in these cases, the guided resonant modes are found to give rise to strong high-Q features in the transmission spectra…
In this study, the electrical conductivity of undoped cerium oxide is evaluated using impedance spectroscopy. We have observed a new phenomenon, which is not related to electrode response but probably to diffusion processes in the grain boundary. An equivalent circuit has been constructed based on the observation, and…
A cell which consists of a porous 18 μm thick Y-doped (YSZ) electrolyte vol % open porosity) on a NiO-YSZ anode substrate and a cathode using has been investigated in the single-chamber configuration. The cell performance and catalytic activity of the anode was measured in a flowing air-methane gas mixture with variou…
A metallosupramolecular coordination polyelectrolyte prepared by the reaction of cobalt(II) with a novel bisterpyridine ligand has been assembled as the active component in electrochromic films by sequential deposition using electrostatic layer-by-layer self-assembly.
Diatoms are unicellular algae with silicified cell walls, which exhibit a high degree of symmetry and complexity. Their diversity is extraordinarily high; estimates suggest that about 10(5) marine and limnic species may exist. Recently, it was shown that diatom frustules are mechanically resilient, statically sophisti…
Experimental observations on the B4 phase of liquid crystal mixtures formed from bent-core (P-8-O-PIMB) and rod (5CB) achiral molecules reveal the stabilization of the B4 phase with an unusually large size of chiral domains. The phenomenon is interpreted as an intrinsic property of the B4 phase when arising below the…
Collagen, a large insoluble protein with a characteristic triple helical structure, is found as the most prominent component of extracellular matrix. The functions of collagen are not limited to providing mechanical strength to various tissues and organs as a structural protein, as it has been pointed out that collage…
In this article, we review some of our recent work on the development and study of the properties of self-organizing supermolecular liquid crystalline dendritic materials. Prior to this purpose, the state of the art in the field of molecular design, structure and properties of liquid-crystalline dendrimers (LCDs) will…