Materials Literature
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A Fresnel lens with electrically-tunable diffraction efficiency while possessing high image quality is demonstrated using a phase-separated composite film (PSCOF). The light scattering-free PSCOF is obtained by anisotropic phase separation between liquid crystal and polymer. Such a lens can be operated below 12 volts…
The sterically protected dithiadiazolyl radical (F3C)3C6H2CNSSN. (1) crystallises in two polymorphs: 1alpha, comprised of monomeric units and 1beta, containing a mixture of both pi*-pi* dimers and S = (1/2) monomers; whilst both polymorphs exhibit similar structure-directing motifs, the variation in packing leads to d…
Facile synthetic modulation of the pore shape and pore entrance of large pore cubic silica mesophases with fcc and bcc three-dimensional structures was achieved by applying post-synthesis treatment with sulfuric acid.
The vibrational spectra of crystals of bismuth borates Bi 24 B 2 O 39 , Bi 4 B 2 O 9 , BiBO 3 , and Bi 2 B 8 O 15 were obtained for the first time, and the spectra of Bi 3 B 5 O 12 and BiB 3 O 6 crystals measured in the range 30–1600 cm −1 at room temperature were refined. The lines observed were assigned to the corre…
Rodlike GaOOH particles and films were successfully prepared in a large scale from a simple aqueous gallium nitrate solution. First, a hydrothermal treatment of the solution at led to the formation of GaOOH rods, and their subsequent heat-treatments at promoted transformation into having the similar particle morpholog…
The effect on solid oxide fuel cell (SOFC) anode performance of replacing with a solid solution in Cu-ceria-yttria-stabilized zirconia (YSZ) composites was investigated. In both cases, the electrode composites were made by impregnation of porous YSZ with nitrate salts. Calcination of the to 1273 K, prior to the additi…
Two approaches for the determination of the primary and secondary geometric isotope effect are compared for the exemplary porphyrinoid system porphycene, which has two intramolecular hydrogen bonds. A three-dimensional Born-Oppenheimer potential energy surface is calculated in terms of the symmetric and antisymmetric…
A hierarchically organized architecture in multiple scales was generated from potassium hydrogen phthalate crystals and poly(acrylic acid) based on our novel biomimetic approach with an exquisite association of polymers on crystallization.
Highly ordered mesoporous ethanesilica (MES) with 2D hexagonal structure was synthesized from 1,2-bis(trimethoxysilyl)ethane under neutral conditions for the first time. Divalent salts, such as NiCl2, MgCl2, ZnCl2, ZnSO4 and Zn(NO3)2, were used to help the formation of the ordered mesostructure. The MES samples were c…
Synthesis, crystal structures, electrochemical and physical properties of the new ligand, EDO-EDT-TTF-py (L1) [4,5-ethylenedioxy-4′,5′-(4-pyridylethylenedithio)tetrathiafulvalene], and the paramagnetic transition metal coordination complexes, M(hfac)2(EDO-EDT-TTF-py)2; M = CuII (2), MnII (3), and CuII(hfac)2(EDO-EDT-T…
Large-area nanostructured noble-metal films (Ag, Pt, and Au) can be deposited with high yields and various morphologies on silicon formed between the semiconductor and the noble metal by means of a galvanic cell. It is shown that the morphology of Ag, which is different from that of Pt and Au, can be influenced marked…
In a recent computational study [G. N. Vayssilov, B. C. Gates and N. Rösch, Angew. Chem., Int. Ed. Eng., 2003, 42, 1391], we found zeolite-supported Rh6 clusters, interacting with hydroxyl groups of the support, to undergo partial oxidation due to reverse spillover of hydrogen onto the metal cluster. Now, we have exte…
A new series of achiral bent-core mesogens is presented. The mesophase behaviour has been investigated using differential scanning calorimetry, polarizing microscopy, X-ray diffraction, and dielectric and electro-optical measurements. Depending on the length of the terminal chains the homologues form nematic phases, c…
We describe a new, simple, room-temperature wet-chemical approach for assembling Au and Ag nanoparticles into nanowire networks, without the use of lithographic templates. Five to 35 nm-diameter nanowires passivated with a thin organic layer were synthesized by mechanically agitating a biphasic liquid mixture of an aq…
New L-lysine-based, dumbbell-form, low-molecular-weight gelators, in which two L-lysine derivatives are linked by alkylene spacers, were synthesized and their gelation abilities for aqueous solutions and organic solvents were examined. These gelators are amphiphilic gelators that function as not only hydrogelators but…
Self-organized anodic titania nanostructures (nanoporous films, nanodot, or nanorod arrays) were fabricated by a combined anodization from superimposed Al/Ti layers sputter-deposited on glass substrates. The specimens were first anodized in a constant potential mode to form nanoporous anodic alumina films with differe…
Mesoporous TiO2 and mixed Ti oxides are prepared by a modified sol-gel method using a block copolymer as a mesoporous template. Calcination of the material at 400 °C for template removal is shown to induce crystallization of pure TiO2, resulting in the destruction of the original mesoporous structure and the developme…
A new type of mixed-valence polyoxoanionic cluster, [V(V)13V(IV)3O42(Cl)]8-, composed of 14 {VO5} square pyramids and 2 {VO4} tetrahedral units, hosting a chloride ion has been synthesized and characterized.
AIM: To investigate diffusion in mammalian cell culture by gel entrapment within hollow fibers. METHODS: Freshly isolated rat hepatocytes or human oral epidermoid carcinoma (KB) cells were entrapped in type I collagen solutions and statically cultured inside microporous and ultrafiltration hollow fibers. During the cu…
Vertically well aligned P-doped ZnO nanowires were prepared on ZnO-Ga/glass templates at 550 degrees C by reactive evaporation without metal catalysts and the nanowires were found to be single crystalline with the würtzite structure, oriented in the c-axis direction; the P-doping shortened the physical lengths of the…