Materials Literature
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In this paper, we report the successful use of non-cadmium-based quantum dots (QDs) as highly efficient and nontoxic optical probes for imaging live pancreatic cancer cells. Indium phosphide (core)-zinc sulfide (shell), or InP/ZnS, QDs with high quality and bright luminescence were prepared by a hot colloidal synthesi…
This study evaluates the cytotoxicity of four carbon-based nanomaterials (CBNs)--single-walled carbon nanotubes (SWNTs), multiwalled carbon nanotubes (MWNTs), aqueous phase C60 nanoparticles (aq-nC60), and colloidal graphite--in gram negative and gram positive bacteria. The potential impacts of CBNs on microorganisms…
Abstract Electron microscopy studies are used to explore the morphology of thin poly(3,4‐ethylenedioxythiophene) and polystyrene sulfonate acid (PEDOT:PSS) films. The figures show that the films are composed of grains with diameters in the range of about 50 nm. Energy dispersive X‐ray spectroscopy analysis reveals tha…
Homogeneous single-layer graphene films are fabricated using an electrophoretic deposition technique, and their field-emission properties are investigated. The graphene films show high density, uniform thickness, numerous edges normal to the film surface, and good interface contact and adhesion with the substrate, and…
Abstract A novel autophotosensitive polyimide (APSPI) was synthesized through introducing benzophenone (BP) moiety into the backbone chain and acrylate group into side chain of PI. The BP moiety can generate active radicals, which can initiate acrylate group to form crosslinked network. The study of photosensitive pro…
The planar type 1 kW class solid oxide fuel cell (SOFC) stack using metallic interconnects such as ferritic stainless steel has been developed for application in a residential power generation system. For the intermediate temperature operation of the SOFC, a higher performance of anode-supported single cells of 10×10…
The densification of high energy ball milled Si3N4 nanopowders through spark plasma sintering was investigated. Nanoceramics of Si3N4, with fine microstructure, comprising of grains with a diameter of ∼70 nm, were produced after sintering at 1600°C for 5 min in N2 atmosphere with a fast heating rate of 300 K min−1. Th…
Abstract Side‐chain liquid crystalline ionomer (SLCI) containing sulfonic acid groups with a polymethylhydrosiloxane main‐chain was used in the blends of polypropylene (PP) and polybutylene terephthalate (PBT) as a compatibilizer. The crystalline behavior, morphological, and mechanical properties of the blends were in…
Abstract Conducting composites were prepared by melt mixing of ethylene–propylene–diene terpolymer (EPDM) or styrene‐butadiene rubber (SBR) and 35 wt % of carbon black (CB). Stability of electrical properties of rubber/CB composites during cyclic thermal treatment was examined and electrical conductivity was measured…
In materials with high magnetostriction, e.g., Galfenol (Fe100−xGax), strong magnetoelastic coupling produces a strong dependence of the modulus on the magnetic state of the system. This is manifested in stress-strain curves which depend on the applied magnetic field H. Highly textured free standing zone melt Fe81.6Ga…
Abstract Rheological behavior in melt of aliphatic hyperbranched polyesters (AHBP), synthesized using pseudo‐one‐step and one‐step procedure, was investigated in this work. Three commercially available AHBP were also examined. Because of the presence of relatively strong hydrogen bonds between numerous end hydroxyl gr…
The synthesis and structural characterization of several 1,1,3,3-tetramethylguanidine (H-TMG) solvated magnesium aryloxide complexes are reported. Bu(2)Mg was successfully reacted with H-TMG, HOC(6)H(3)(CMe(3))(2)-2,6 (H-DBP), and either ethanol, a carboxylic acid, or diphenyl phosphate in a 1:1 ratio to yield the cor…
Abstract This article investigates the effects of electron beam (EB) radiation on poly( D , L ‐lactic acid)‐ b ‐poly (ethylene glycol) copolymer (PLA‐ b ‐PEG‐ b ‐PLA). The copolymer films were EB irradiated at doses from 0 to 100 kGy. The degradation of these films was studied by measuring the changes in their molecul…
Thermally responsive hydrogel gratings were micropatterned and immobilized on a gold coated glass substrate using a photochemical cross-linking and attachment method. The thermoresponsive behavior of hydrogels with different thicknesses was studied in MilliQ water by the surface plasmon diffraction (SPD) technique. Th…
We theoretically study the photoinduced domain-type structural changes in the visible region of graphite. By means of the ab initio total-energy calculation, we clarify the adiabatic path for the nucleation of this domain, wherein the interlayer distance of the original graphite is contracted and new interlayer $\ensu…
Abstract Propelled starch (PG) was first crosslinked with epichlorohydrin to obtain insoluble crosslinked pregelled starch (CPS). The latter was graft copolymerized with different amounts of Methacrylic acid using potassium persulphate as initiator. This was done to obtain six levels of poly (MAA)‐crosslinked pregelle…
Network and protective current transformer designers at present are especially interested in the TPZ class current transformers. The behaviour of protective current transformers in a transient state is very important because it influences the proper functioning of the protection system. The basic problem in the design…
The crystallization of binary n-alkane solid solution n-C(18)H(38)/n-C(19)H(40) = 90/10 (molar ratio) (abbreviated as C(18)/C(19) = 90/10) and the microencapsulated counterpart (abbreviated as m-C(18)/C(19) = 90/10) has been investigated by a combination of differential scanning calorimetry (DSC) and temperature-depen…
Radiation damage is one of the major impediments in obtaining high-resolution structural information utilizing ionizing radiation. From electron microscopy it is known that electron irradiation of biological samples results in the formation of molecular hydrogen. In the present work radiation-induced structural change…
Abstract A method is developed for anchoring enzymatically degraded cationized starch as electrosteric stabilizers onto synthetic latices, using cerium(IV) to create free‐radical grafting sites on the starch. Direct anchoring of debranched starch onto a poly(methyl methacrylate) seed latex yields a latex stabilized by…