Materials Literature
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Abstract 1‐Substituted pyrroles such as 1‐(hydroxymethyl)pyrrole, 1‐(3‐hydroxypropyl) pyrrole, 1‐ H ‐1‐pyrrolylmethyl 4‐methyl‐1‐benzenesulfonate, 1‐ H ‐1‐pyrrolylpropyl 4‐methyl‐1‐benzenesulfonate, and 1‐ H ‐pyrrolylmethyloctanoate were synthesized and oxidative polymerized and copolymerized with pyrrole by using (NH…
Abstract Summary: Organic‐inorganic hybrid materials consisting of nanosized silica particles with surface grafted PS or PS‐ b ‐PMMA were synthesized using ATRP. These hybrid materials were used in the fabrication of highly‐ordered isoporous membranes. Optical characterization revealed that the membranes consisted of…
Photostable naphthalocyanines (see Figure) can act as optical limiters, simultaneously absorbing nanosecond laser pulses at 532 nm and 1064 nm. In these naphthalocyanines, where M can correspond to Zn, InCl, or In(p-trifluoromethylphenyl), the pattern of substitution and the nature of the substituents were found to be…
Abstract This research discusses the properties of hybrid materials formed by polyvinylpyrrolidone (PVP) and tetraethoxysilane (TEOS) of different weight ratios, by the sol–gel process, to evaluate the feasibility of its application to process‐dyed nylon fabrics. After using equipment including FTIR, 13 C‐NMR, and SEM…
Electronic structures of multiferroic $R\mathrm{Mn}{\mathrm{O}}_{3}$ $(R=\mathrm{Y},\mathrm{Er})$ have been investigated by employing photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). We have found that Mn ions in $R\mathrm{Mn}{\mathrm{O}}_{3}$ are in the trivalent high-spin state with the tota…
Using pulsed-laser deposition, a two-step growth technique was applied to epitaxial SrTiO3 (STO) thin films on LaAlO3 substrates providing a way to obtain an effective strain relaxation in these films otherwise strained due to lattice mismatch between film and substrate. By changing the thickness of a first layer, dep…
The Curie temperature ${T}_{c}$ of ferromagnetic ${\mathrm{La}}_{0.7}{\mathrm{A}}_{0.3}{\mathrm{CoO}}_{3}$ ($A=\mathrm{Ca}$, Sr, Ba) thin films was studied as a function of the film thickness $d$ for $400\phantom{\rule{0.3em}{0ex}}\mathrm{nm}>d\ensuremath{\geqslant}2.6\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$. A fini…
A new type of amphiphilic ABC triblock copolymer, poly(acrylic acid)(33)-poly(styrene)(47)-poly(ethylene oxide)(113) (PAA(33)-PS(47)-PEO(113)), was designed to assist the synthesis of core/shell structured CdTe nanowires via a one-step synthetic route. The PAA block was adopted to capture cadmium ions as the precursor…
Transparent and colorless AlPO 4 gel and glass are prepared via a simple aqueous sol–gel route using aluminum lactate and phosphoric acid as precursors. The stoichiometric AlPO 4 glass derived from this sol–gel route has a mesoporous structure with a surface area of 504 m 2 /g after calcination to 600°C. With increasi…
What is the design principle of a discotic liquid crystal? Up to now, such systems have involved a more or less rigid core surrounded by flexible side groups that point outward. Herein, shape-persistent macrocycles are introduced with flexible side chains that have intraannular positions (see picture).
Persistence of infection can occur when the host immune response is compromised because of the presence of a foreign implant. Surface modification of biomaterials with phospholipid polymers may enhance biocompatibility and reduce incidence of infection by impeding bacterial and leukocyte adhesion. A rotating disk mode…
Abstract A series of alumina supported Pd‐ZnO catalysts were synthesized and studied for methanol steam reforming. Pd loading and Pd/Zn ratio were optimized to improve catalyst activities. Among all the catalysts studied, the catalyst with a Pd loading of 8.9 wt % and a Pd/Zn molar ratio of 0.38 exhibited the highest…
Traditional vanadate glasses are known to be totally black (see inset Figure), while their crystal counterparts are promising laser materials due to their large stimulated-emission cross-section. In this work, a novel transparent vanadate glass (see main Figure) is realized for the first time. Furthermore, when doped…
The use of peptide-based drugs is limited by their rapid degradability and toxicity at high concentration during their therapeutic application. These problems could be managed by the use of a peptide delivery agent for sustained release in the site of action. Collagen is one of the most proven biomaterials of good bio…
We present a potential of mean force surface for rotation about phi and psi dihedral angles of the alpha(1 --> 4)-glycosidic linkage in the maltose disaccharide (4-O-alpha-d-glucopyranosyl-d-glucopyranose) in aqueous solution. Comparison of the vacuum and solution free energy surfaces for maltose shows the principal e…
Spiders produce multiple types of silk that exhibit diverse mechanical properties and biological functions. Most molecular studies of spider silk have focused on fibroins from dragline silk and capture silk, two important silk types involved in the survival of the spider. In our studies we have focused on the characte…
Anodic porous alumina templates contain highly ordered nanochannels that are frequently used for fabrication of thermoelectric nanowires. Thermal properties of the templates are of high interest in thermoelectric device applications. This paper reports the temperature-dependent, anisotropic thermal conductivity and th…
A detailed neutron diffraction study of ${\mathrm{Sr}}_{2}{\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Cr}}_{x}\mathrm{Re}{\mathrm{O}}_{6}$ half-metallic double perovskites has been carried out. With increasing Cr content, the temperature for the cubic-tetragonal transition decreases (${T}_{t}\ensuremath{\approx}490\phant…
Abstract The role of the type of organic modifier used with montmorillonite (MMT) on the formation of polymer/clay nanocomposites in the melt compounding process was investigated. Various organoclays including primary [12‐aminolauric acid (12ALA)], secondary [dioctylamine (DOA)], tertiary [trioctylamine (TOA)], and tw…
Employing realistic many-body potentials for a series of simple melts, including Ag, Al, Au, Co, Cu, Mg, Ni, Pb, Pd, Pt, Rh, and Si, we tested by molecular-dynamics simulation the scaling laws of diffusion coefficients with different expressions of the reduction parameters. Our simulation results give sound support to…