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。
OBJECTIVE: To study whether regenerated electrospun silk fibroin (SF) nanofibers as nerve conduits could improve nerve regeneration microenvironment and induce the facial nerve regeneration of Sprague-Dawley rats. DESIGN: Electrospun SF nanofibers were prepared to bridge a 5-mm facial nerve defect in Sprague-Dawley ra…
In this study, a reductively cleavable photoreactive linker, disulfide-phenylazide (SPA), was synthesized and used to functionalize inorganic mesoporous silica nanoparticles (MSNs) by simple amidation reaction. Changed zeta potential, FT-IR and UV-vis or fluorescence spectra confirmed the successful photo-responsive f…
Molecular dynamics simulations (MD) were carried out to model the miscibility behavior of blends of poly(p-dioxanone) (PPDO) with poly(vinylphenol) (PVPh). The Hildebrand solubility parameters of the pure polymers and the Flory-Huggins interaction parameters of the blends at different compositions were computed. Negat…
Abstract In the present work, the wetting concept was further developed for explanation of the kinetics of silica localization in binary and ternary rubber blends in the first mixing period. In the second mixing period when the wetting process is finished, a re‐localization process of silica within the blend phases ta…
Abstract The process of ion exchange was used to introduce copper ions into a commercial soda lime silicate glass, the composition of which corresponds to the miscibility gap in the SiO 2 ‐Na 2 O system. After exchange, the samples have been thermally treated in a gaseous hydrogen atmosphere. The optical absorption of…
We have examined optical properties of a fluorene derivative with two positively charged substituents, 1,1’- diethyl-4,4’-(9,9-diethyl-2,7-fluorenediyl-2,1-ethanediyl)dipyridinium perchlorate (1), in water. The photoluminescence quantum yield of 1 was relatively high (35%) for use as a fluorescent probe in water. We a…
The interplay of metal orbitals in metal TCNQ (7,7,8,8-tetracyanoquinodimethane) and DCNQI (N,N′-dicyanoquinonediimine) complexes is investigated on the basis of molecular orbital calculations. For the M(TCNQ) materials, where M = Na, K, Rb, Cs, Tl, Cu, and Ag, the conductivity decreases with the increase in dimerizat…
Multivalent nanostructures are becoming an increasingly important player in the self-assembly of supramolecular lattices. Understanding the role that shape plays in the coordination of the assemblies is crucial for the functional response of the material. We develop a simple design rule for the assembly of multivalent…
Abstract Various half‐titanocene complexes of the ATiCl 2 Nu type, where A is the pentamethylcyclopentadienyl (Cp*) or indenyl (Ind) group and Nu a nucleophile (ethoxy group or chloride), were used for the polymerization of L ‐lactide, LLA. In the cases where Nu is an ethoxy group, a 5% excess of ATiCl 3 was used to a…
Crystallographic orientation of mesostructured silica films on a substrate drastically changes when the substrate is modified with an anisotropic surface. The [01] axis of a two-dimensional (2D) hexagonal structure of the film prepared on a polyimide surface using C(22)EO(20) as a structure-directing agent changes fro…
In this work, we have designed and synthesized a series of aggregation-induced emission active compounds (4a–c) via Suzuki coupling reaction. Their one and two-photon absorption properties have been investigated. These compounds exhibit high thermal stability, losing only 5% of their weights when heated to 482–503 °C…
The Publications Advisory Committee (PAC) within the Society of Environmental Toxicology and Chemistry (SETAC) is involved in several activities related to SETAC publications, including books, the Globe (society newsletter) and, of course, the two society‐sponsored journals, Environmental Toxicology and Chemistry (ET&…
An efficient protocol, atom transfer radical nitroxide coupling chemistry, for the preparation of polymer/clay nanocomposites via grafting-onto strategy with well-defined polymer, which were synthesized via atom transfer radical polymerization, has been described. The radical coupling, taking place between the clay la…
Abstract Polyurethane–clay nanocomposite adhesives were prepared by different synthetic routes and their microstructures were determined by X‐ray diffraction measurements and from transmission electron microscopy images. The preparation method of the polyurethane nanocomposite adhesives was systematically changed, tha…
Abstract Uniaxial deformation of amorphous L ‐polylactic acid films was performed at two different temperatures at which thermal degradation was minimal, 70 °C or T g + 10 and 90 °C or T g + 30. Samples were annealed postdeformation for long times (either 15 or 45 min) to approach equilibrium conditions. Samples defor…
Easy as pi: The Ugi four-component reaction (4CR) gives access to a functional π system consisting of an electron donor and an electron acceptor (see figure; PT=phenothiazine, AQ=9,10-anthraquinone). Intramolecular photoinduced electron transfer generates charge-separated diradical ion pairs originating from the singl…
By means of molecular dynamics simulations the free energy of adsorption of model dendrimer characterized by monomers of different chemical affinity is predicted as a function of the number and position of the monomers. The results show that modifying the affinity of the only end-monomers with one of the two solvent c…
The synthesis and photophysical properties of the complex [Fe(phen)(2)(TTF-dppz)](2+) (TTF-dppz = 4',5'-bis-(propylthio)tetrathiafulvenyl[i]dipyrido[3,2-a:2',3'-c]phenazine, phen = 1,10-phenanthroline) are described. In this complex, excitation into the metal-ligand charge transfer bands results in the population of a…
Abstract magnified image Recently, the prospects for amorphous phases of graphene (α‐g) have been explored computationally. Initial models were flat, and contained odd‐member rings, while maintaining threefold coordination and sp 2 bonding. Upon relaxation, puckering occurs, and may be traced to the existence of penta…
Chemical modifications of Scots pine (Pinus sylvestris) wood flour were performed with vinyl acetate (VA) and acetic anhydride (AA) in the presence of potassium carbonate as a catalyst. Scots pine wood flour samples were successfully acetylated with VA (19 wt% gain) and AA (24 wt% gain). The effect of chemical modific…