Materials Literature
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Using liposomes as templates is one of the paths leading to the synthesis of silica spherical particles. In these particles, the silica wall is assembled onto the external surface of the liposome. Generally, the walls of the resulting silica spheres are porous and in the specific case of liposome templating, the exact…
By means of the combined use of scanning electron microscopy, energy dispersive spectroscopy, and atomic force microscopy in the Kelvin probe mode the mechanism of the chromate conversion coating (CCC) formation, discussed in the first part of the paper, was extended to the case of AA2024, taking into account the effe…
Palladium-catalyzed reactions such as Sonogashira coupling, Suzuki coupling, Stille coupling, Heck reactions, and Glaser-Hey oxidation were used to construct porphyrin modules of nano-scale molecular size in recent years. Recent developments in the supramolecular assembly of porphyrins and Pd (II) and in the organopal…
Novel routes to quantum dots of InP and GaP have been developed using the thermolysis of the corresponding metal diorganophosphide in hot 4-ethylpyridine, a polar, co-ordinating Lewis base. Investigations into the thermal decomposition mechanisms of M(PtBu2)3 (M = Ga, In) suggested three major processes, two of which…
Carbon nanofiber-copper composites are fabricated by composite plating techniques using a plating bath containing an effective dispersing agent for carbon nanofibers. Carbon nanofibers disperse uniformly in the copper matrix, as observed by surface and cross-sectional scanning electron microscopy. By changing electrod…
The transition alumina (γ + δ)-Al2O3 was modified by intensive dehydroxylation, potassium-alkalization and hydrogenation, and examined for possible impacts of modification on surface (i.e. accessibility, chemical composition, functional groups and acid sites) and bulk properties by N2 sorptiometry, X-ray diffractometr…
The surface active sites of a fresh Mo2C/Al2O3 catalyst and their evolution under passivation conditions were characterized by IR spectroscopy using CO as the probe molecule. It was found that adsorption properties of CO on the fresh sample were quite different from those of the reduced passivated one. Moδ+ (0 < δ < 2…
Two beta-cyclodextrin dimers tethered by photoswitchable bis(phenylthienyl)ethene moieties were synthesized as potentially tunable receptor molecules. The cyclodextrin cavities of these dimers were linked via their secondary sides, with the photochromic bis(phenylthienyl)ethene unit either directly connected to the se…
In order to investigate the applicability of laser micro welding to the fabrication of medical devices, Ti-Ni shape memory alloy wires with pseudo-elasticity were micro spot melted by using YAG laser. By changing the melting parameters, such as laser power or pulse duration, the evolution in microstructure, tensile st…
The synthesis, spectroscopy and electrochemical characterisation of palladium and platinum phthalocyanines is reported. Electrochemical techniques were used in conjunction with electronic absorption spectroscopy to analyse the reduced and oxidised phthalocyanine species in solid films and in solution, and significant…
The rheological properties and the morphology of blends of styrene-butadiene rubber (SBR), devulcanizated by ultrasound (dSBR), with polystyrene (PS) were studied. A compatibilizer, a styrene-butadiene block copolymer (SBS) was also added to dSBR/PS blends. The shear viscosity at low and high shear rates, the complex…
In this work, the mechanical behavior of hybrid circular braids without a core under tensile loads is studied experimentally and analytically. A predictive model of the mechanical response of the braids based on the constituent yarn characteristics and machine parameters is developed. The structural geometry of the fa…
When a mixture is confined, one of the phases can condense out. This condensate, which is otherwise metastable in the bulk, is stabilized by the presence of surfaces. In a sphere-plane geometry, routinely used in atomic force microscope and surface force apparatus, it, can form a bridge connecting the surfaces. The pr…
Vinyltrimethylsilane (VTMS) was used as a precursor for the deposition of SiCOH films by direct and remote plasma-enhanced chemical vapor deposition (PECVD). Film property was compared with films prepared with tetramethylsilane (4MS). As-deposited films and the films annealed at 450°C have been characterized. The grow…
The synthesis of novel donor–π–acceptor dyads based on a pyrrolo-annelated tetrathiafulvalene unit is described. The linear and non-linear optical properties of these chromophores have been investigated, together with their redox properties. For a dyad containing a p-nitrophenyl acceptor group, a significant third-ord…
Silicon carbide has been used as a post-irradiation temperature monitor since first proposed for this use in 1961. The basic technique has been the repeated measurement of the length of a SiC monitor following isochronal annealing. This technique has been shown to overestimate irradiation temperature by ∼100°C. This p…
A newly synthesized donor meso-DMBEDT-TTF [DMBEDT-TTF = 2-(5,6-dihydro-1,3-dithiolo[4,5-b][1,4]dithiin-2-ylidene)-5,6-dihydro-5,6-dimethyl-1,3-dithiolo[4,5-b][1,4]dithiin] afforded a superconducting salt beta-(meso-DMBEDT-TTF)2PF6, with a transition temperature at 4.3 K (onset) under a hydrostatic pressure of 4.0 kbar.
ZnO-based thin-film transistors (TFTs) have been fabricated by depositing ZnO (radio-frequency sputtering) on /p-Si substrates at various temperatures ranging from room temperature to 300°C. When rapid thermal annealing in a forming gas ambient was used for H treatment on ZnO, the TFTs prepared at 200°C exhibited a hi…
The electrical conductivity and melting behavior of alkali molten carbonates, Li 2 CO 3 and K 2 CO 3 , coexisting with oxide particles, γ LiAlO 2 and MgO, have been investigated. The conductivity was measured by the ac impedance method. The melting of carbonates caused an abrupt change in the electrical conductivity…
The New Zealand blackfoot abalone, Haliotis iris Gmelin, is among the few gastropods that precipitate both calcite and aragonite in their shells. The location, composition, and thickness of these mineral layers may affect color, luster, and strength of the shell, which is locally important in jewelry manufacture. Skel…