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。
By employing Monte Carlo simulations for various tube diameters and preferences of the tube surface for the A, B, and C segments, the morphologies of A(5)B(5)C(5), A(5)B(10)C(5), and A(5)B(5)C(10) triblock copolymer melts confined in nanocylindrical tubes were examined. The interaction parameters between different seg…
Gyroid-to-cylinder transition in a diblock copolymer melt under an electric field is studied by real-space dynamical self-consistent-field theory. Starting from an equilibrium gyroid structure, we apply an electric field along [111], [11̄0], and [112̄] directions of the conventional unit cell of the gyroid structure.…
Within the Landau-de Gennes phenomenological theory, we study the influence of an applied electric field with average strength E{a} on the position of a nematic line defect with topological charge M=+/-1/2 in a hybrid cell. We explore the biaxial structure of the defect core and we describe its expulsion from the cell…
The synthesis of poly(pyrrole), poly(terthiophene), and poly(3,4-ethylenedioxythiophene) with unusual fibrillar morphologies has been achieved by chemical polymerization in a biphasic ionic liquid/water system. Use of aqueous gold chloride as the oxidant, with the monomers dissolved in a hydrophobic ionic liquid, allo…
One of the important routes for the production of zirconia is by chemical treatment and removal of silica from zircon sand (ZrSixOy). We present here a completely green chemistry approach toward enrichment of zirconia in zircon sand; this is based on the reaction of the fungus Fusarium oxysporum with zircon sand by a…
The electrical response of an individual multiwalled carbon nanotube (MWNT) and its contacts, welded to a coplanar waveguide (CPW), was measured up to 24 GHz using a technique that removes environment effects. This is the first time MWNT contact effects have been systematically isolated from the CPW. Each contact resp…
Sheared self-assembled lamellar phases formed by symmetrical diblock copolymers are investigated through dissipative particle dynamics simulations. Our intent is to provide insight into the experimental observations that the lamellar phases adopt parallel alignment at low shear rates and perpendicular alignment at hig…
Tetrakis(aryloxy)phthalocyanine (4c) and its Zn congeners (4a and 4b) and Ni congener (4d) were synthesized, and their self-assembling properties in coordinating and non-coordinating solvents were investigated by absorption and fluorescence spectroscopy, matrix-assisted laser desorption ionization time-of-flight mass…
A facile template-free aqueous solution strategy of oriented attachment assisted self-assembly of Sb 2 O 3 nanorods and nanowires into well-defined complex nanostructures is described in this paper. It is demonstrated that at the temperature of 40 °C, the Sb 2 O 3 nanorods with different lengths (2∼50 μm) and diameter…
To provide for prolonged, site-specific delivery of basic fibroblast growth factor (bFGF) to the grafted skin in a convenient manner, biodegradable chitosan-gelatin microspheres containing bFGF were fabricated and incorporated into a porous chitosan-gelatin scaffold in this study. The microspheres are an integral part…
Silver pyrazolates [[3-(CF3)Pz]Ag]3, [[3-(CF3),5-(CH3)Pz]Ag]3, [[3-(CF3),5-(Ph)Pz]Ag]3, [[3-(CF3),5-(But)Pz]Ag]3, and [[3-(C3F7),5-(But)Pz]Ag]3 have been synthesized by treatment of the corresponding pyrazole with a slight molar excess of silver(I) oxide. This economical and convenient route gives silver pyrazolates i…
Two tricyanometallate precursors, (Bu 4 N)[(Tp 4Bo )Fe(CN) 3 ]·H 2 O·2MeCN ( 1 ) and (Bu 4 N)[(pzTp)Fe(CN) 3 ] ( 2 ) [Bu 4 N + = tetrabutylammonium cation; Tp 4Bo = tris(indazolyl)hydroborate; pzTp = tetrakis(pyrazolyl)borate], with a low-spin Fe III center have been synthesized and characterized. The reactions of 1 o…
Patterns of behavior: Complexes of the cluster {Mo72Fe30} and the surfactant dioctadecyldimethylammonium chloride (DODMACl) produced in CHCl3 form patterns with a honeycomb structure at the air/water interface after evaporation of the solvent (see SEM image). The concentration of DODMACl in CHCl3 is critical to whethe…
A facile laser-etching method was used for the one-step creation of various controllable dimensions of anisotropic micropatterns consisting of an alternating arrangement of microgrooves and microstripes with rugged nanoprotrusions, which after modified with fluoroalkylsilane reagent, showed perfect isotropic superhydr…
The phase behavior of 44 poly(isoprene- b -styrene- b -ethylene oxide) (ISO) linear triblock copolymer melts was investigated at weak to intermediate segregation strengths and spanning a comprehensive range of compositions. Phases were characterized by a combination of experimental techniques, including small-angle X-…
Using videomicroscopy data of a two-dimensional colloidal system the bond-order correlation function G{6} is calculated and used to determine both the orientational correlation length xi{6} in the liquid phase and the modulus of orientational stiffness, Frank's constant F{A}, in the hexatic phase. The latter is an ani…
The synthesis and characterization of water-soluble nitric oxide (NO)-releasing monolayer-protected gold clusters (MPCs) are reported. Tiopronin-protected MPCs ( approximately 3 nm) were functionalized with amine ligands and subsequently exposed to 5 atm of NO to form diazeniumdiolate NO donors covalently bound to the…
Small angle neutron scattering studies on polystyrene loaded with spherical silica nanoparticles under contrast-matched conditions unequivocally show that chain conformations follow unperturbed Gaussian statistics independent of chain molecular weight and filler composition. Liquid state theory calculations are consis…
Farbenfroh: Durch Einstellen der Elektronendonoreigenschaften des π-konjugierten Bithiophen-Gerüsts wurden intensiv emittierende Festkörper erhalten, deren Maxima einen großen Teil des sichtbaren Spektrums abdecken (siehe Bild). Eine tiefrote Fluoreszenz mit großer Stokes-Verschiebung um 200 nm resultiert aus einem in…
Novel hybrid triphenylene-carbosiloxane liquid crystalline monomers and star-shaped oligomers have been synthesized and their thermal behavior and liquid-crystalline properties analyzed and characterized. All compounds exhibit a columnar hexagonal phase and show, particularly the oligomers, a small tendency to crystal…