Materials Literature
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We report on the preparation, characterization, and photophysical study of new fluorescent core/shell nanoparticles fabricated by electrostatic layer-by-layer assembly. On the basis of gold cores with a diameter of 13 nm, these nanocolloids possess different fluorescently labeled polymer corona layers at various dista…
Skin is the largest organ of the body and is a potential route of exposure to engineered nanomaterials, but the permeability of the skin to these nanomaterials is unknown. We selected commercially available quantum dots (QD) of two core/shell sizes and shapes and three different surface coatings to determine if QD cou…
When austenitic high-alloy steel weld metal sustains single-phase solidification generally described as A-mode solidification, this is well-known to result in heightened solidification cracking susceptibility.1–3 To reduce the solidification cracking susceptibility of austenitic stainless steel, it is known to be effe…
Polyaniline (PANI) was synthesized from 0.1 M aniline containing neutral medium such as sodium oxalate. The synthesis was achieved on 1-µm Ni-plated mild steel (MS/Ni) by using cyclic voltammetry technique. The corrosion performances of PANI coating with and without MS/Ni electrodes were evaluated by using AC impedanc…
The degree of compatibility of NR/EPDM blend can be improved by the use of specially selected polymeric compounds. Acrylonitrile and N-(4-chlorophenyl) acrylamide were homopolymerized and then copolymerized. The two homopolymers and the copolymer were incorporated each into the noncompatible blend system (50/50) NR/EP…
Auto-catalyzed hydrolytic depolymerization of poly(butylene terephthalate) (PBT) waste in neutral water was carried out in an autoclave at 200°, 215°, 230°, and 245°C under autogenously pressure. The effects of particle size, agitator speed, charge ratio, and reaction time on PBT hydrolyses were studied. Reaction prod…
In this research, the effects of formulation and the amount of triallyl cyanorate (TAC) as coupling agent on peroxide vulcanization and mechanical properties of the participated silica filled EPDM elastomer are investigated. The results of curing process and measuring mechanical properties (hardness, modulus, tensile…
Halogen-free flame-retarded linear low density polyethylene (LLDPE) composites were prepared in a melt process using magnesium hydroxide (MH) as a flame retardant. The effects of surface modifiers on mechanical properties and rheological behavior of the filled LLDPE have been studied. The results show that the use of…
Abstract Triaquatris(acetyl acetonate)europium(III) [Eu(acac) 3 ] at 1, 5, 10, and 15% was doped in diglycidyl methacrylic (DGMA) resin, and their luminescent properties in the solid state are reported. These systems were characterized with elemental analysis, thermogravimetric analysis (TGA), differential scanning ca…
Quaternary sulfides MPb8In17S34 (M = Cu, Ag, Au) were synthesized at 1123 K from their elements in stoichiometric ratios. These compounds crystallize in monoclinic space group P2(1)/m. The crystal structures feature combinations of 2[InS2] (NaCl111-type) and [MPb2In3S6] (NaCl100-type) slabs. These compounds are semico…
We report the observation of ${\mathrm{Co}}^{3+}∕{\mathrm{Co}}^{4+}$ short-range charge ordering in 10% Ho-doped $\mathrm{Sr}\mathrm{Co}{\mathrm{O}}_{3\ensuremath{-}x}$ by means of high resolution neutron powder diffraction. The associated one-dimensional commensurate modulation, which can be described with the propag…
The kinetics of lysozyme crystallization under seeded isothermal batch conditions was followed by measurement of the decline in solution concentration versus time. Kinetics were measured for five different values of the seed crystal mass. The data were analyzed using a recently proposed mathematical model. For each se…
Abstract Polyesters provide a good basis to work on for designing novel biodegradable materials that are also mechanically and thermally resistant. In this study, a series of aliphatic poly(ester amide)s (PEA) based on cyclohexane units was synthesized. Block‐copolymers of cyclohexyl sebacate and cyclohexyl sebacamide…
Precise stoichiometry and departures therefrom in the composition of the tetrahedrally coordinated compound semiconductors allow impurity incorporation in more than one configuration. Ultrahigh resolution infrared spectroscopy of $\mathrm{CdTe}\ensuremath{\mathbin:}\mathrm{O}$ at low temperatures reveals a unique shar…
Acknowledgments ..........................................................................................................................658 References ......................................................................................................................................658 Polymer nanoparticles are pa…
Abstract Model diblock copolymers of poly(1,4‐butadiene) (PB) and poly(dimethylsiloxane) (PDMS), PB‐ b ‐PDMS, were synthesized by the sequential anionic polymerization (high vacuum techniques) of butadiene and hexamethylciclotrisiloxane (D 3 ) in the presence of sec ‐BuLi. By homogeneous hydrogenation of PB‐ b ‐PDMS,…
Applying effective medium theory and the Boltzmann transport equation, a formula is derived for calculation of the Seebeck coefficient $\ensuremath{\alpha}$ (thermoelectric power) of alloys with phase separation (composite) under especial consideration of the electrochemical potential $\ensuremath{\mu}$ and its change…
Atomistic molecular dynamics (MD) simulations of 4-n-pentyl 4'-cyano-biphenyl (5CB) have been performed, adopting a specific ab initio derived force field. Two state points in the nematic phase and three in the isotropic phase, as determined in a previous work, have been considered. At each state point, at least 10 ns…
Solid-stabilized emulsions have been used as a model system to investigate the dynamics of charged microparticles with diameters of 1.1 microm at oil-water interfaces. Using confocal microscopy, we investigated the influences of interfacial curvature, cluster size, and temperature on the diffusion of solid particles.…
Guest-host interactions have been examined experimentally for amorphous solid water (ASW) films doped with CO2 or N2O. The main diagnostics are Fourier transform infrared (FTIR) spectroscopy and temperature programmed desorption (TPD). ASW films deposited at 90 K are exposed to a dopant, and the first molecules that a…