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。
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…
Thermally stable mesoporous core-shell structured titania microspheres with well-defined hollow interiors were directly prepared by a novel hydrothermal precipitation of TiCl4 in the presence of urea and ammonium sulfate.
Abstract A pentadentate phenol‐containing ligand (H 3 L) with N 2 O 3 donor atoms yields Ni II 2 ( 1 ), Ni II 4 ( 2 ), Cu II 2 ( 3 ) and Cu II 4 ( 4 ) complexes, which have been structurally characterized by X‐ray diffraction. Complex 1 contains a single‐atom O ‐bridged urea. The compounds were characterized by IR, UV…
Mimicking the texture and anisotropy of the template, birefringent conducting polymer films (see picture) have been obtained by electropolymerization of 3,4-ethyldioxythiophene (EDOT) within a hexagonal lyotropic liquid crystal. Using a self-assembled template to control molecular orientation in conducting polymers co…
Not π stacking but CH⋅⋅⋅π-ring center interactions lead to the fluorescence emission observed for the first time from a heteromolecular excimer complex. In single crystals a toluene molecule is located perpendicular to a Ph2P(S)-disubstituted anthracene chromophore. This toluene complex fluoresces (see picture) but t…
Because of their potential to reduce the environmental impact and geopolitical consequences of the use of fossil fuels, fuel cells have emerged as tantalizing alternatives to combustion engines. Like a combustion engine, a fuel cell uses some sort of chemical fuel as its energy source but, like a battery, the chemical…
Poly(vinylalkohol), ein inhärent amphiphiles Material, kann nach Abscheidung auf einer Aluminiumoxidmembran in Form von Nanofasern (siehe Bild) als superhydrophobe Oberfläche wirken. Die Anordnung der hydrophoben und hydrophilen funktionellen Gruppen sowohl auf der Oberfläche als auch innerhalb des Materials hat einen…