Materials Literature
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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…
Amorphous, hydrous manganese oxide was prepared by anodic deposition in manganese acetate solution. The effect of heat-treatments (up to 600°C) on the material characteristics of the oxides was investigated. The results indicated that the as-deposited oxide, which was fully amorphous, was transformed into a fibrous sh…
It is shown that the ipsocentric orbital-based model explains how the charge of the central cation drives the delocalisation pathway in metalloporphyrins. A positive charge +Ze at the centre of the porphin ring gives rise to a two-way radial transfer of charge within the pi structure of the porphin macrocycle. This ma…
We propose a new approach to compute the dynamic potential (Green function) from two- and three-dimensional periodic arrays of point sources in a three-dimensional space. The method has at least exponential convergence rate (in some cases it has Gaussian convergence rate). The convergence rate is independent of the po…
Organic–inorganic hybrids were prepared using ureapropyltriethoxysilane, methacryloxypropyltrimethoxysilane and acrylic acid modified zirconium(IV) n-propoxide precursors and were characterized by small angle X-ray scattering, X-ray diffraction and photoluminescence spectroscopy. The results indicate an effective inte…
Abstract For Keggin-type polyoxometalate complexes (α-[XMo12O40]n− (X = S, P, As, Si, Ge; n = 2–4) and α-[XW12O40]n− (X = S, P, As, Si, Ge, B, Al; n = 2–5)), the conversion processes of the first two one-electron waves into a two-electron wave were investigated in dipolar aprotic solvents containing H+, Li+, or Na+ as…
Treatment of cuprous halide (Cu(I)X, X = Cl, Br, and I) and a tripodal tripyridine ligand (L) consisting of a 1,3,5-triethylbenzene spacer gave a unique two-dimensional (2D) polymer sheet structure involving a rare Cu(I)(6)X(6) hexagon prism cluster unit, which exhibits intense fluorescence around 448-476 nm.
In tissue engineering, micro/nanofabrication is important to modify substrate surfaces for regulating the attachment and growth of cells. In neuroscience, it is significant for neural regeneration; this involves guiding and extending dendrites and axons by a cell culture scaffold which acts as an extra cellular matrix…