Materials Literature
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Organic-inorganic hybrid aerogels with polymethylsilsesquioxane (PMSQ, CH3SiO1.5) composition have been synthesized by a modified two-step sol-gel process. The precursor alkoxysilane is hydrolyzed in a weakly acidic condition, and subsequently allowed to undergo polycondensation in a weakly basic condition which is br…
Rutile-structured TiO 2 and Al-doped TiO 2 dielectric thin films were grown on a sputtered Ru electrode by atomic layer deposition (ALD) using O 2 - or N 2 O -plasma oxidants. The O 2 -plasma-based ALD process produced films with a similar growth rate and electrical performance to those deposited using the O 3 -oxidan…
A range of reduced titania (TiO(x)) supported platinum electrocatalysts have been synthesised using physical vapour deposition on arrays of electrodes. Surfaces with equivalent thicknesses of platinum in the range 0.2-2.5 nm on a uniform layer of TiO(x) have been synthesised on 10 x 10 arrays. The arrays have been use…
The standard procedure to measure the Rth-JC of semiconductor devices requires a thermocouple measurement of the case temperature while the IC-package is in contact with a water-cooled heat-sink. This method often produces wrong results since the measurement of the case temperature is quite prone to errors. Transient…
Skin is an important route of exposure to chemicals after occupational, environmental and consumer product usage, routes also pertinent to nanomaterial exposure. Knowledge of the rate and extent of absorption is required for risk assessments to be made. The primary barrier to chemical absorption is the stratum corneum…
Two donor–acceptor thread-like compounds incorporating viologen (V2+) units and 1,5-dihydroxynaphthalene (DNP) stations have been prepared. Their ability to form self-assembled charge-transfer (CT) complexes with cucurbit[8]uril (CB[8]) is evidenced by UV-Vis and NMR spectroscopies, as well as by mass spectrometry. Bi…
The first synthesis of 6,11-diamino-[6]carbohelicenes is described: the short 5 step sequence involves Suzuki-Miyaura coupling, functional group transformations and electrophilic aromatic cyclisation; the original strategy allows the preparation of di- and tetra-substituted helicenes in comfortable yields.
DNA fragments were synthesized consisting of 12 nucleotides and containing non-nucleotide inserts of different length in the middle. Two nitroxide spin labels 4-amino-2,2,6,6-tetramethylpiperidine-1-oxyl were attached at the two ends of the molecules. Single-stranded DNAs and double-stranded DNAs (DNA duplexes) in fro…
The direct on-cell use of hydrocarbon fuels in solid oxide fuel cells (SOFCs) involves many thermochemical and electrochemical reactions that occur on anode electrocatalysts, both at and away from the three-phase boundary. We have used first-principles density functional theory calculations and kinetic modeling to inv…
We reported on the characteristics of an indium-free Ga-doped ZnO (GZO)/Ag/GZO multilayer electrode for use in bulk heterojunction organic solar cells. By inserting a very thin Ag layer between two GZO layers, we can fabricate a GZO-based transparent electrode with a low sheet resistance of and a high optical transmit…
An ionic liquid gel and a hydrogel of xanthan gum were prepared, the former showed a thermally induced shape-memory effect and the latter was further converted into an ionically cross-linked hydrogel with reversible swelling-shrinking behavior using Ca2+.
The dynamics of carboxylate ligands on the surface of zirconium oxo clusters was investigated in two case studies. Zr4O2(methacrylate)12 was investigated by one- and two dimensional NMR spectra both in the solid state and in solution. In solution, the cluster is C2h symmetric; stepwise intramolecular exchange of the f…
Resistance switching memory devices constructed on flexible plastic substrates via the spin-coating of titanium oxide solution were characterized in this study. The resistance switching memory device exhibited a ratio of the high resistance to low resistance states of more than 102, and this large resistance ratio was…
Olfactory receptor (OR) is a large family of G protein-coupled receptors that can detect odorant in order to generate the sense of smell. They constitute one of the largest multiple gene families in animals including primates. To better understand the variation in odor perception and evolution of OR genes among primat…
Microarchitectural configurations of buffers in routers have a significant impact on the overall performance of an on-chip network (NoC). This buffering can be at the inputs or the outputs of a router, corresponding to an input-buffered router (IBR) or an output-buffered router (OBR). OBRs are attractive because they…
Pure and calcium-doped silica and titanium dioxide thin films were prepared by the sol-gel method. Two different metallic substrates, i.e. stainless steel (316L) and titanium alloy (Ti6Al4V), were used for thin film deposition. Physicochemical properties and roughness of the thin films derived were investigated using…
The aldol reactions of propionaldehyde and butyraldehyde have been explored in supercritical CO2, scCO2, using an automated continuous flow reactor. The reaction was found to proceed over a variety of heterogeneous acidic and basic catalysts and with increased selectivity compared to using neat reactants.
We report the controlled syntheses of Fe–Pt, Fe–Pd and Fe–Pt–Pd nanoparticles having different isolated shapes including sphere, cube, octopod-cube, star, rod, bilobe, tetrahedron, or multipod with size of 5–50 nm. The formation of such a rich variety of shapes was made possible by controlling the synthetic conditions…
A catalytic amount of electrochemically generated "ArS+" ("ArS+" = ArS(ArSSAr)+) initiates a cation chain reaction of dienes that involves the addition of ArSSAr associated with stereoselective intramolecular carbon-carbon bond formation, and the direct (in-cell) electrolysis of a mixture of a diene and ArSSAr with a…
Piperidine and pyrrolidine nitroxyl radicals (nitroxide) contain unpaired electrons and have been widely recognized as antioxidants, contrast agents, spin probes, radiation protective agents and polymerization mediators. Nitroxyl radicals can react with free radicals and reductants and their reactivities depend on the…