Materials Literature
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The present article expounds the development of sunnhemp fiber-reinforced waste polyethylene bag composites. No surface modifications of fibers were made. Sunnhemp fibers of 25.4 mm in length with waste polyethylene bags were stacked and composite materials were fabricated using hot compression molding technique. Thes…
Nanoindentation is used to measure hardness of Ti 3 SnC 2 , a recently synthesized nanolaminate carbide. Hardness cartography and optical microscopy are used to correlate hardness values and sample phases. An indentation size effect is observed, and a bulk hardness of 9.3 GPa is deduced for Ti 3 SnC 2 . Such a value i…
Free-standing periodic mesoporous organosilica (PMO) films were grown at the interface of an ethylene-bridged organosilica and surfactant template via a self-assembly process. After the pyrolysis of the PMO films with ethylene-bridged organosilica moieties in the pore walls under an Ar flow at temperatures ranging fro…
Nanocrystalline LaOCl:Tb(3+)/Sm(3+) phosphors were synthesized by a Pechini-type sol-gel process. Under UV and electron-beam excitation, LaOCl:Tb(3+)/Sm(3+) show the characteristic emission of Tb(3+) ((5)D(3,4)-->(7)F(6),...2) and Sm(3+) ((4)G(5/2)-->(6)H(5/2,7/2,9/2)), respectively. In particular, the cathodoluminesc…
The crystal structure, stability, elastic constants and electronic properties of PdN(2) for four polymorph structures: pyrite, marcasite, CoSb(2) and ST(AA), have been investigated using first-principles calculations. At zero pressure all four polymorphs are metallic and thermodynamically unstable but mechanically sta…
Abstract Isothermal differential scanning calorimetry (DSC) was used to study the curing behavior of epoxy prepreg Hexply®1454 system, based on diglycidyl ether of bisphenol A (DEGBA)/dicyandiamid (DICY) reinforced by glass fiber. Cure kinetics of an autocatalytic‐type reaction were analyzed by general form of convers…
Although synthetic methods for high quality near-monodispersed nanoparticles of metal and semiconductor are well established, their conversion into various functional nanoparticles is challenging. We report here an imidazole based polymer coating that can be used in deriving <25 nm diameter water-soluble functional na…
For the purpose of immunoassay, electrospun membranes can be thought as the threadlike self-assembling of nano/microbeads. Nonwoven membranes of electrospun poly(epsilon-caprolactone) (PCL) fibers display excellent tenacity, flexibility and suitable surface energy. These PCL membranes exhibit easy handling in air, fas…
A high pressure Raman scattering study of Bi(2)MoO(6), a member of the bismuth layered Aurivillius family of ferroelectrics, is presented. This study showed the onset of two reversible second-order phase transitions near 2.8 and 7.0 GPa. The pressure dependence of the Raman bands provides strong evidence that the stru…
Abstract Shape‐memory properties such as shape fixity and recovery ratio of amorphous starch‐based materials extruded under normal conditions were evaluated for the case of single and cyclic recovery processing. This study focused on the effect of moisture as a stimulus for the activation of recovery. A high recovery…
Abstract A series of silica‐supported silver catalysts with various Ag loading (3–30 wt %) and different treatment (oxidation and subsequent reduction by H 2 ) were prepared, and their local structures were characterized by extended X‐ray absorption fine structure (EXAFS) analysis. In oxidized catalysts, silver were m…
Abstract A modular approach toward the synthesis of polymers containing dendron groups as side chains is developed using the Diels–Alder “click” reaction. For this purpose, a styrene‐based polymer appended with anthracene groups as reactive side chains was synthesized. First through third‐generation polyester dendrons…
Novel biodegradable hollow nanocapsules composed of two kinds of weak polyelectrolytes, CT and gamma-PGA, were successfully prepared by the deposition of their LbL-assembled films onto silica particles and the subsequent removal of the silica. These CT-gamma-PGA hollow nanocapsules showed unique size increases at pH =…
Abstract In order to examine how changes in the size of the rotary group affect the efficacy of molecular probes for monitoring changes in local viscosity, a boron dipyrromethene dyebearing a meso ‐phenanthrene unit has been synthesized and fully characterized. 19 F NMR spectroscopy, together with molecular modelling,…
Star polymers derived from cholic acid with poly(allyl glycidyl ether) arms have been prepared via anionic polymerization, yielding polymers with well-defined molecular weight and low polydispersity. The double bonds of the allyl groups on the polymer are used to introduce either amine or carboxylic acid groups to obt…
The desulfurization of meso-trithienylsubporphyrins leads to meso-trialkylsubporphyrins (see scheme). Oxidation at the benzylic position of the meso-alkyl substituent of 1 has been used to prepare a valeryl-substituted subporphyrin that exhibits highly perturbed optical and electrochemical properties compared to other…
By employing off-lattice Monte Carlo simulations, the competitive adsorption and assembly of block copolymer blends on a nanopatterned surface were investigated. The segment distributions and polymer configurations are examined by varying the chemical structures of polymers, the interactions between segments and adsor…
Abstract We report on the synthesis of ZnO colloidal nanocrystal clusters with well‐tunable particle size and high water solubility by using a high‐temperature solution‐phase hydrolysis approach. The metal salt hydrolyzed after rapidly injecting a solution of sodium hydroxide in diethylene glycol. Poly(acrylic acid) s…
The transverse free vibration of nanobeams subjected to an initial axial tension based on nonlocal stress theory is presented. It considers the effects of nonlocal stress field on the natural frequencies and vibration modes. The effects of a small scale parameter at molecular level unavailable in classical macro-beams…
A simple approach to tune the optical properties of the hyperbranched conjugated polymers by only adjusting the terminal-backbone interactions has been reported in this article. Hyperbranched conjugated polyazomethines have been successfully prepared by the reaction of tetramine and dialdehyde. Not only varying the mo…