Materials Literature
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A hybrid molecular dynamics (MD) algorithm which combines a full MD description of solute–solute and solute–solvent interactions with a mesoscale treatment of solvent-solvent interactions is developed. The solvent dynamics is modeled on a mesoscale level by coarse graining the system into cells and updating the veloci…
A detailed study of the role that solution pH plays in the layer-by-layer processing of the weak polyelectrolytes poly(acrylic acid) and poly(allylamine hydrochoride) was carried out. It was found that dramatically different polymer adsorption behavior is observed as one systematically increases (or decreases) the cha…
In previous studies nonionic organofunctional silicones were shown to enhance the intimacy of protein−silicone interactions at solid−liquid interfaces. In the current studies the same phenomenon was shown to manifest itself, even more clearly, at liquid−liquid interfaces. Proteins or silicones by themselves were unabl…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTMesoporous Gallium Oxide Structurally Stabilized by Yttrium OxideMitsunori Yada, Masahumi Ohya, Masato Machida, and Tsuyoshi KijimaView Author Information Department of Applied Chemistry, Faculty of Engineering, Miyazaki University, Miyazaki 889-2192, Japan Cite this: Langmuir…
Ethylene 2,6-naphthalenedicarboxylate cyclic oligomers (ENCs) were prepared by the ring/chain equilibration (cyclodepolymerization) of poly(ethylene 2,6-naphthalenedicarboxylate) (PEN) in dilute solution of biphenyl and polymerized with antimony trioxide. ENCs thus prepared consisted of a distribution of oligomeric sp…
The reaction of a mixture of [NPCl 2 ] n and Cs 2 CO 3 first with ( R )-(+)-1,1‘-binaphthyl-2,2‘-diol (HO−C 10 H 6 −C 10 H 6 −OH) (binaphthol) and subsequently with phenol (HO−C 6 H 5 ) in refluxing 1,4-dioxane gave the series of the optically active random copolymers {[NP(O 2 C 20 H 12 )] x [NP(OC 6 H 5 ) 2 ] 1 - x }…
The pathway and kinetics of the order−order transition from shear-aligned cylindrical microdomains to spheres arranged on a bcc lattice in a highly asymmetrical block copolymer are monitored using small-angle neutron scattering (SANS). Shear-aligned hexagonally closed-packed cylindrical microdomains were heated to the…
Raman spectroscopy was employed as a fast and exact general method to determine the charge on BEDO-TTF (BO) in its complexes in any sample form such as single crystals, powders, and dispersed polymer films. Linear dependencies between the frequencies of two totally symmetric C C stretching modes and the charge on BO w…
Palladium multilayers deposited on Pt(111), Pt(100), and Pt(110) single-crystal electrodes have been characterized by using adsorbed nitric oxide as a probe molecule. Nitric oxide adlayers can be easily formed on the palladium-covered electrodes from nitrous acid or NO-saturated solutions and are stable under electroc…
The pathway and kinetics for the cylinder-to-sphere order−order transition in a mixture of a matched diblock and triblock copolymer of styrene and ethylene−butene-1 is reported. The microstructure transformation was monitored by viscoelastic measurements, and the structural assignments of the intermediate states were…
The adsorption of chicken egg white lysozyme at the functionalized silicon oxide−solution interface has been studied using the combined measurement of spectroscopic ellipsometry and neutron reflection. The solid oxide surface was modified by coating a self-assembled monolayer of pentadecyltrichlorosilane with terminal…
To design new polymers for use in vivo it is necessary to characterize the surface of the material to understand the interactions that occur when it is exposed to biological environments. Incorporation of phosphorylcholine (PC) into polymers has been shown to improve biocompatibility by suppressing unfavorable respons…
In the current work, sandwich composite structures with innovative constructions referred to as Z-pins, or truss core pins, are investigated. The Z-pin core sandwich construction offers enhanced transverse stiffness, high damage resistance, and multi-functional benefits. The present study deals with analysis of low-ve…
The saturation adsorption of octadecyltrichlorosilane (OTS) on two fumed silicas [Aerosil 380 (A380), Aerosil OX50 (OX50)] was investigated as a function of their hydration states. The amount of water adsorbed onto the fumed silica was in the order superhydrated A380 > as is A380 ∼ superhydrated OX50 > as is OX50. The…
Conditions for polymerizing ethylene terephthalate cyclic oligomers (ETCs) with the catalyst antimony trioxide were investigated with the ultimate goal in mind of using ETCs to produce high-performance poly(ethylene terephthalate) (PET) composites. The ETCs used were prepared both by a direct synthesis method and by c…
Tertiary amine dendrimers with both hydrophilic and hydrophobic chains on every end were synthesized from poly(propyleneimine) dendrimers DAB- dendr -(NH 2 ) n ( n = 8, 32, and 64) using sequential amidations and LiAlH 4 reductions. The tertiary amine dendrimers were quaternized completely with methyl iodide and conve…
The effect of reduction temperature on the hydrogen adsorption and Rh dispersion in a Rh/Ce 0.68 Zr 0.32 O 2 catalyst with texturally stable Ce 0.68 Zr 0.32 O 2 support was investigated. Rh dispersion data were also obtained from Rh particle size analyses made using high-resolution transmission electron microscopy (HR…
Various types of epoxide−amine networks based on diglycidyl ether of Bisphenol A (DGEBA), diglycidylaniline (DGA), or TGDDM were prepared, and the effect of the reaction mechanism on network formation, its structure, and properties was investigated. Structure evolution was followed, and fraction of the sol, equilibriu…
Two kinds of transitions involving a change in molecular assembly, lattice disordering/ordering transition (LDOT) and demicellization/micellization transition (DMT), in highly asymmetric polystyrene- block -polyisoprene (SI diblock) copolymers were investigated using oscillatory shear rheometry, transmission electron…
The achiral syn folded conformer (face-to-face) of the ethane-bridged bis(Zn porphyrin) gradually transforms into the chiral extended anti form in the presence of enantiopure guest molecules (alcohols or amines) upon lowering the temperature from 293 to 183 K. The mechanism of the supramolecular chirality induction is…