Materials Literature
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Inorganic−organic hybrid SiO 2 sol−gels anchored with amino (NH 2 −CH 2 CH 2 −NH-, TMSen, and −NH−CH 2 CH 2 −NH-, Bis-TMSen) and mercapto (HS-) ligands have been studied as new sorbents for Cu 2+ separation. The TMSen-anchored gels were found to be selective for Cu 2+ removal in the presence of Cd 2+ and Zn 2+ . In co…
The interaction forces between high molecular weight polystyrene brushes ( M n = (0.7−1.2) × 10 6 g/mol), formed by radical chain polymerization from an initiator chemically bound to silica (quartz-glass) substrates, were measured with a surface forces apparatus. Because of the high grafting densities obtained (7−10 n…
The structures of ices III and V have been studied under their thermodynamic conditions of stability by neutron diffraction. The results clearly indicate partial ordering of the water molecule orientations for both ice structures. For ice V the ordering is both pressure and temperature dependent, while no significant…
From the reaction of cis -[(cyclam)Fe III (Cl) 2 ]Cl (cyclam = 1,4,8,11-tetraazacyclotetradecane) with hydroxylamine in water the octahedral nitrosyliron complexes trans -[(cyclam)Fe(NO)Cl](ClO 4 ) ( 1 ) and cis -[(cyclam)Fe(NO)I]I ( 2 ) have been isolated as crystalline solids. EPR spectroscopy and variable-temperatu…
We use conducting-tip atomic force microscopy (AFM) to measure local electronic properties of single wall carbon nanotube (SWNT) circuits on insulating substrates. When a voltage is applied to the tip and AFM feedback is used to position the tip, images formed from the tip-sample tunnel current have single tube resolu…
Zhao et al. [Phys.Rev.B 58, 13824 (1998)] depicted several atomic structures of domain boundaries on a Si(111) surface and criticized the article by the present author and the co-workers. I will point out that their criticism is incorrect and their structure models have no consistency.
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…