Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Solid-state electrochromic devices(ECDs)are of considerable technological and commercial interest because of their controllable transmission, absorption, and/or reflectance. For instance, a major application of these devices is in smart windows that can regulate the solar gains of buildings and also in glare attenuati…
fine particles with high photoluminescence were prepared by a spray pyrolysis process. The emission intensity of particles under vacuum ultraviolet (VUV) excitation was optimized by controlling the Tb content, excess quantity of boron, and heat-treatment temperature. The highest luminescent intensity under VUV excitat…
In tissue engineering, excellent biodegradable materials are desired as temporary scaffolds to support cell growth and disappear with the progress of tissue regeneration. We previously synthesized biodegradable poly(depsipeptide-co-lactide), poly[(Glc-Asp)-co-LA] and poly[(Glc-Lys)-co-LA], having reactive side-chain g…
Polymer nanocapsules were synthesized using core/shell nanospheres composed of an identical polymer. Linear polypyrrole (PPy)/crosslinked PPy core/shell nanospheres were synthesized stepwise by microemulsion polymerization using two oxidants with different chemical oxidation potentials, i.e. copper(II) chloride and ir…
Variable temperature synchrotron powder diffraction methods have been used to study the structures and phase transitions in a series of perovskites of composition Sr1−xBaxHfO3. We find that increasing the Ba content results in a transition from the orthorhombic Pnma type structure to the cubic Pmmvia two intermediate…
Novel luminescent materials based on lanthanides [Eu(III), Tb(III), Sm(III), and Dy(III)] and a mixed zirconium phenyl- and m-sulfophenyl phosphonate as the host matrix, have been prepared and photophysically characterized. Powder X-ray diffraction, 31P-MAS-NMR spectroscopy, IR spectroscopy, and diffuse-reflectance UV…
Successful photo-orientation of mesostructured surfactant/silica hybrids is performed via hierarchically relayed multiple transfers among hetero-interfaces. A Langmuir–Blodgett monolayer of the azobenzene-containing polymer was first optically oriented via irradiation with linearly polarized light, and the photoinduce…
We report the syntheses of cobalt N-confused porphyrins; this work completes the series of the late first-row transition metals that have been incorporated into the core of N-confused porphyrin, and in these compounds the macrocycles can act as either a -2 or -3 anion.
The reversible trans ↔ cis photoisomerization of azobenzene-based self-assembled monolayers on ultrathin platinum films has been monitored for the first time by UV-Vis transmission spectroscopy with a conventional spectrophotometer.
A new approach to the synthesis and the organization of Mn3O4 (hausmannite) nanoparticles has been developed using the thermolysis of the magnetic cluster [Mn12O12(C2H5COO)16(H2O)3] linked to a SBA-15 mesoporous silica functionalized with –COOH groups. The obtained composites were studied by X-Ray diffraction (XRD), i…
Swelled plastics in supercritical carbon dioxide provide unique environments for stabilizing palladium and rhodium nanoparticles and for catalytic hydrogenation. Complete hydrogenation of benzene to cyclohexane can be achieved in 10 minutes using the plastic stabilized Rh nanoparticles at 50 degrees C in supercritical…
Unsymmetrical dibenzophenazine discotic mesogens were prepared via the corresponding tetraalkoxybenzil derivatives. These dibenzophenazines exhibit Colho phases over extremely broad temperature ranges.
Organic surfaces of specific chemistry can be fabricated using plasma polymerisation. A recently developed deposition approach allows gradients in surface carboxyl group concentration to be fabricated over a distance of 13 mm from a mixed acrylic acid/octadiene plasma. The utility of these surfaces in the investigatio…
Desosamine is a 3-(dimethylamino)-3,4,6-trideoxyhexose found in some macrolide antibiotics. In Streptomyces venezuelae, there are seven genes required for the biosynthesis of this unusual sugar. One of the genes, desIV, codes for a dTDP-glucose 4,6-dehydratase, which is referred to as DesIV. The reaction mechanisms fo…
Passive films formed on Fe-18Cr alloy in a borate buffer solution were studied using impedance spectroscopy and photoelectrochemical response. The passive film was composed of an inner oxide and covering hydroxide layer. Both layers exhibited n-type semiconductor properties with an optical bandgap energy, E g , of 3.4…
Water soluble star polymers consisting of a porphyrin center and four poly(oxazolines) arms such as Por-[poly(methyloxazoline)]4 (1), Por-[poly(ethyloxazoline)]4 (2), Por-[poly(methyloxazoline-co-ethyloxazoline)]4 (3) and Por-[poly(methyloxazoline)-b-poly(ethyloxazoline)]4 (4) were synthesized and used for the investi…
The density, surface tension, and viscosity of the melts from the PbO‐B 2 O 3 ‐SiO 2 system have been measured at temperatures in the range 1073–1473 K. The effect of composition on these properties was also investigated. The density of the melt was found to increase linearly with increasing PbO content. Molar volume…
Abstract The influence of the alloying elements on the interface reactions of zinc coatings during the galvanization process was examined. These reactions affect the crystallization and the structure and properties of the outer layer of the coatings. Depending on the type and concentration of the alloying additions in…
A novel technique for the formation and lift-off of thin porous silicon films from starting substrates in a single step by electrochemical etching in hydrofluoric acid-based solutions is described. Lift-off or separation of porous silicon (PS) film occurs under specific sets of current density and HF concentration, wh…
Nanocrystalline cobalt oxide, Co(3)O(4), monoliths exhibiting hierarchical bimoidal porosity have been prepared by nanocasting of porous silica monoliths.