Materials Literature
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Abstract The electrochemical adsorption and hydrogenation of benzene on a roughened Pt electrode were studied by confocal Raman microscopy. Some forbidden vibrational bands of benzene were detected owing to the lowering of the symmetry upon adsorption. The results infer that benzene is adsorbed on the Pt surface in a…
Abstract Series of maleic mono‐ and diester monomers have been prepared by esterification of maleic anhydride with poly(ethylene glycol) having different molecular weights, and with n ‐dodecyl alcohol. These monomers were copolymerized with 2‐acrylamido‐2‐methylpropane sulfonic acid (AMPS) using different dose rates o…
Abstract Samples of polyglycolide were degraded in various buffered solutions in order to investigate the effects of buffer concentration, pH and particular buffer ions on the hydrolysis reaction. The small‐angle X‐ray scattering profiles changed with degradation; long periods were calculated and their changes with de…
Abstract Syntheses and biodegradation of statistical copolymers of D , L ‐lactide ( D , L ‐LA) with trimethylene carbonate (TMC), rac ‐1‐methyltrimethylene carbonate (1‐MTMC) and 2,2‐dimethyltrimethylene carbonate (2,2‐DTMC) were investigated at various monomer ratios using SmMe(C 5 Me 5 ) 2 THF as an initiator at 80…
In situ X-ray absorption fine structure (EXAFS) spectroscopy combined with on-line gas analysis was used to get insight into the oxidation state of the constituents and of the structure of a Pd/ZrO2 catalyst during activation and catalytic combustion of methane. The sample was prepared from an amorphous Pd33Zr67-alloy…
Abstract The thermal doping of the emeraldine base (EB) form of polyaniline using two different sulfonic acids, dodecylbenzene sulfonic acid (DBSA) and p ‐toluenesulfonic acid ( p TSA) has been studied. Differential scanning calorimetry was used to record thermal events associated with the doping process. EB undergoes…
Abstract Poly(ethylene terephthalate) (PET) is a widely used polyester, which can be crystallized from the melt over a wide range of supercooling conditions or, alternatively, quenched into the amorphous state and, subsequently, crystallized by thermal treatment above the glass‐transition temperature. It is well known…
A simple focused laser beam pruning method is used to fabricate unique two‐ and three‐ dimensional structures (see Figure and the cover), without a pre‐patterned substrate and under ambient conditions. The construction of microscopic movable carbon nanotube (CNT) structures that are controlled by laser light are also…
A 2D 10-element test microbolometer array was fabricated without an air-gap thermal isolation structure. The microbolometer uses vanadium oxide film deposited by pulsed laser deposition at room temperature as the infrared (IR) sensitive layer. The IR response of the uncooled microbolometer was evaluated in the spectra…
A novel, simple, fast, cheap and pollution-free method was developed for recovering the silver from waste X-ray photographic films with NaOH stripping. The method has a number of advantages because it obviates the need for burning, oxidizing, electrolysis or purifying steps. Moreover, all experiments were carried out…
Cuprophilic interactions are observed between the two copper centers of the unprecedented dimer 2, the structure of which contains two associated [CuICl2]− ions. The surrounding complex is derived from the internal reduction of the CuII complex 1, which displays a cis-divacant octahedral coordination geometry.
Abstract A novel route for making polyimide sub‐micron fibers is described. The ultrafine fibers are prepared by electrospinning a poly(amic acid) solution, a precursor of polyimide, followed by thermal imidization. The fiber diameters, which are much smaller than conventionally spun fibers, range from a few tens of n…
Abstract Two monosilanol/disilanol derivatives were synthesised by treatment of Ph 3 SiOH or Ph 2 Si(OH) 2 with [ n Bu 4 N]VO 3 ( 3 ) in ethanol solution. The mononuclear anionic dioxo vanadium( V ) species [{Ph 3 SiO} 2 VO 2 ] − ( 4 ) and the dinuclear complex anion [{Ph 2 SiO 2 VO 2 } 2 ] 2− ( 5 ) thus obtained are…
The biomimetic formation of hydroxyapatite composites using complexes of alkylated dendrimers (see Figure) and surfactants as templates is described. Despite a high organic content, high stiffness is displayed, and for one dendrimer/surfactant combination investigated, significant toughening is observed.
Photo‐patternable cholesteric materials that combine fluorescence and a photochemically variable helical pitch have been investigated. Two cholesteric mixtures containing chiral photochromic (see Figure) as well as fluorescent dopants are examined. It is shown that photoregulation of both the fluorescence intensity an…
Abstract The Raman and infrared spectra of vanadinite [Pb 5 (VO 4 ) 3 Cl] specimens from three localities were studied. Raman spectra were found to be both orientation and temperature dependent. Measurement of the Raman spectra at liquid nitrogen temperature allowed better band separation and increased the intensities…
Polymeric micelles composed of block copolymers of poly(l-lactide) (PLLA)/poly(ethylene glycol) (PEG) of which end was modified with a novel pH sensitive element of a sulfonamide, sulfadimethoxine (SD; pKa 6.1), or a polymer (PSD; Mw: 3000) of its derivative were investigated. PSD was synthesized by radical polymeriza…
A new 1,10‐phenanthroline‐containing π‐conjugated polymer, the color of which can be tuned from blue to red by metal complexation, has been synthesized. The polymer responds sensitively to various metal ions due to its high coordinating ability, and the Figure shows emission from the polymer–metal complexes under 365…
Carbon capsules with hollow cores and mesoporous shells (HCMS) containing entrapped Au particles were prepared by template replication from solid core/mesoporous shell silica spheres with encapsulated Au particles. The resulting HCMS carbon capsules were then nanocast one step further to generate Au-trapping hollow co…
The reverse micelle technique , here used to synthesize divanadium pentoxide nanorods, enables the nanorod length to be tuned easily by simply keeping them in the micellar solution after the synthesis. The nanorods are characterized by transmission electron microscopy, X‐ray photoemission spectroscopy, and X‐ray diffr…