Materials Literature
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Two enantiomerically 3D chiral POM-based architectures have been constructed based on the achiral ligand bbi, [V10O26](4-) polyoxoanion and mixed valence Cu(I/II) without a chiral auxiliary, and they represent the first examples of enantiomerically 3D POM-based compounds using achiral ligands.
We consider the interaction of an electromagnetic field with a left-handed sphere, i.e., with a sphere fabricated from a left-handed material, in the framework of complex angular momentum techniques. We emphasize more particularly, from a semiclassical point of view, the resonant aspects of the problem linked to the e…
A novel magnetic nanocarrier, cyclodextrin (CD)−citrate−gum arabic modified magnetic nanoparticles (GAMNPs), for hydrophobic drug delivery was fabricated by grafting the citrate-modified CD onto the GAMNPs via carbodiimide activation. The analyses of the transmission electron microscopy and the dynamic light scatterin…
High surface area porous poly(phenylene butadiynylene) networks were obtained (BET surface area up to 842 m(2) g(-1)) by the palladium-catalyzed homocoupling of 1,3,5-triethynylbenzene and 1,4-diethynylbenzene.
We demonstrate a method that uses the pillars on a stamp to cut and exfoliate graphene islands from a graphite and then uses transfer printing to place the islands from the stamp into the device active-areas on a substrate with a placement accuracy potentially in nanometers. The process can be repeated to cover all de…
Abstract A new series of starburst triarylamine fluorophores SBCHO, DBCHO, CZCHO, CZCN, and SBCN, that incorporate diphenylamine or carbazole as the electron donor and dicyanovinyl or aldehyde as the electron acceptor, has been prepared and their photophysical properties are investigated. In sharp contrast to most red…
We demonstrate theoretically that most of the observed transport properties of graphene sheets at zero magnetic field can be explained by scattering from charged impurities. We find that, contrary to common perception, these properties are not universal but depend on the concentration of charged impurities n(imp). For…
A superhydrophobic surface is a surface with a water contact angle close to or higher than 150°. In this feature article, we review the historical and present research on superhydrophobic surfaces, including the characterization of superhydrophobicity, different ways to fabricate rough surfaces, and low-surface-energy…
We have been kindly informed of some minor errors in the above paper. (1) On page 8003 equation (15) is not correct. The correct formulae (and the ones actually programmed) are shown in the pdf file. Since the correct formulae were employed in the program, all the results are correct. This mistake was pointed out by H…
The neighbor network in a two-dimensional polydisperse hard-disk fluid with diameter distribution p(sigma) approximately sigma(-4) is examined using constant-pressure Monte Carlo simulations. Graphs are constructed from vertices (disks) with edges (links) connecting each vertex to k neighboring vertices defined by a r…
Abstract The influence of sulfur‐crosslinked, quasi‐nanosized gels on the rheological and mechanical properties of raw natural rubber (NR) was investigated. Latex gels with different crosslink densities were prepared through the variation of the sulfur‐to‐accelerator ratio. These gels were characterized by dynamic lig…
Abstract Bis(3‐triethoxysilylpropyl) tetrasulfane (TSS) was reacted with the silanol groups of the commercially available clay, Closite®25A (C25A) to prepare TSS‐C25A, which was melt‐compounded with acrylonitrile‐butadiene‐styrene copolymer (ABS). The tetra sulfide groups of TSS‐C25A may chemically react with the viny…
In the past, dendritic polyphenylazomethines (DPA) have been synthesized via the convergent method. However, the convergent method has problems such as difficult terminal-group modifications and an increased number of steps. Therefore, we synthesized the terminal-protected DPA to construct the dendritic structure via…
Reaction of the amino-alkoxides HOCH(CH(2)NMe(2))(2) (Hbdmap) and HOC(CH(2)NMe(2))(3) (Htdmap) with [Ti(OR)(4)] yields a series of heteroleptic titanium alkoxides [Ti(OR)(4-n)(L)(n)] (L = bdmap, tdmap). Substitution of the monodentate alkoxide with the chelating alkoxides becomes progressively more difficult, with hom…
Abstract The hydroperoxide levels of two commercial types of crosslinked poly(vinylpolypyrrolidinone) (or crospovidone) disintegrants were studied as a function of time and temperature using the titanyl sulfate titration method. It was noted that the two crospovidone types exhibited significantly different rates of hy…
We report a series of oligonuclear carboxylate-rich high-spin ironII complexes with three different [FeIIn(mu-O2Cbiph)2n(L)m] (n = 2-4; m = 2 or 4) structural motifs, where -O2Cbiph is 2-biphenylcarboxylate and L is an exogenous ligand bound to terminal iron atoms. Solid compounds were isolated and their structural, s…
Abstract A novel positive‐working photosensitive polyimide (PSPI) based on a poly(hydroxyimide) (PHI), a crosslinking agent having vinyl ether groups, and a photoacid generator (PAG) was prepared. The PHI as a base resin of the three‐component PSPI was synthesized from 4,4′‐oxydiphthalic anhydride and 2,2′‐bis(3‐amino…
Abstract The oxidative degradation of PP/OMMT nanocomposites under γ ‐irradiation was studied. Changes in structure and properties resulting from γ ‐exposure in the range 0–100 kGy were investigated. The results were analyzed by comparing the influence of PP ‐g‐ MA and pristine OMMT on the oxidation kinetics of neat P…
We have measured the structure and chemical composition of ultrathin Pd films on Cu(001) using low-energy electron microscopy. We determine their local stoichiometry and structure, with $8.5\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ lateral spatial resolution, by quantitatively analyzing the scattered electron intensity…
Abstract The crystalline morphologies of isothermally and nonisothermally crystallized poly(phenylene sulfide) (PPS) and its blend with polyamide 66 (PA66) were investigated by polarized optical microscopy with a hot stage. The spherulite superstructure of PPS was greatly affected by crystallizable PA66; a Maltese cro…