Materials Literature
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Polypyrrole was electrochemically synthesized onto a gold electrode in the presence of sodium p-toluenesulfonate (TSNa) as the key dopant. Under the optimal synthesis condition, the surface morphology of PPy/TSNa was tailored and exhibited a nano-tentacle structure. The resulting rough and fuzzy morphology greatly enh…
We wish to show that gas-phase studies of small metal cluster-biomolecule complexes provide fundamental insights into the mechanism leading to enhanced optical absorption in nanoparticle-biomolecular hybrid systems. Here we present, for the first time, a joint experimental and theoretical study of photoabsorption and…
The Langmuir-Schaefer (LS) films of an achiral azobenzene derivative, 4-octyl-4'-(5-carboxypentamethyleneoxy) azobenzene (C8AzoC5), were fabricated and their optical activities were investigated. It was found that the LS film of the trans-C8AzoC5 showed strong Cotton effect, while that of cis-C8AzoC5 did not. The char…
Sponsored by the Hazardous, Toxic, and Radioactive Waste Management Committee of the Environmental and Water Resources Institute of ASCE. This report provides up-to-date technical information and state-of-the-art research findings on the use of zero-valent iron reactive materials to remove contaminants frequently foun…
Abstract Electrochemical polymerization of furan was achieved in acetonitrile/boron trifluoride/ethyl ether (CH 3 CN/BF 3 /EE) mixture in the presence of tetrabutylammonium tetrafluoroborate via constant potential electrolysis at 1.4 V versus Ag/AgCl. Electrochemical behavior of furan was investigated in the same solv…
Abstract Für die Produktion von Lebensmitteln und Pharmazeutika spielt die Auswahl des richtigen Werkstoffes für den Anlagenbau eine wichtige Rolle. Die Frage, wie die produktberührende Oberfläche den Produktionsablauf beeinflusst, ist von zentraler Bedeutung. Dabei wird von den Oberflächen häufig gefordert, dass sie…
We report unique phenomena where the transition from a homochiral helix to a heterochiral helix occurs by increasing the chain length of the l-sequence. Peptides composed of the l-Leu sequences with different lengths and the achiral nona-sequence at the C-terminal side were used here. Conformation of their peptides in…
Facially amphiphilic dendrimers have been shown to provide significant difference in surface behavior due to subtle changes in structure. The monodendrons are capable of providing hydrophobic surfaces, while the didendrons provide superhydrophobic surfaces. This provides an example of how a molecular level change coul…
Abstract In this study, the synthesis, characterization, and properties of a novel biodegradable polymer with improved hemocompatibility were introduced. It was synthesized by end‐capping poly‐ε‐caprolactone (PCL) with phosphorylcholine (PC) groups. The polyester backbone provided the mechanical stability and biodegra…
The spark plasma sintering (SPS) technique was used for the first time to fabricate antimony‐doped tin oxide (ATO) ceramics from monodispersed ATO nanoparticles synthesized by the hydrothermal method. The ceramics' relative density increased from 83.7% when sintered at 750°C to the highest value of 97.4% at 850°C, and…
Abstract Polyaniline (PANI) deposited polyacrylate (PA) powders were prepared by chemical polymerization of aniline in hydrochloric acid with dispersed PA powders. The powders, after dedoped with ammonia water, were re‐doped with camphorsulfonic acid (CSA) to render them conductive, and conductive PANI/polyacrylate co…
Abstract Composites of polypropylene (PP) with mica powder and impact modifiers were produced by internal mixer. A major drawback in the use of mica‐filled PP is its low impact resistance. In the present study, the effect of the maleated PP (MAPP) and impact modifiers was evaluated on the composite properties separate…
Abstract Polycaprolactone (PCL)/starch and PCL/starch/pine‐leaf composites, which can be possibly applied as biodegradable food packaging materials with natural pine flavor, were prepared and characterized in this study. The effect of incorporating a silane coupling agent at different content levels on the physical pr…
Abstract A new liquid‐crystal composite, composed of photopolymerizable self‐assembled fibers and a smectic liquid crystal, and its photopolymerized composite have been prepared. The fibers oriented along the smectic layers are obtained by self‐assembly of an amino acid derivative with terminal methacryloyl groups in…
We report on computer based simulations of multiple electrostatic resonances (ER) of two-dimensional metamaterials with various shape including fractal structures, complex permittivity of the inclusion, and composition. Our model structures are made of inclusions of materials with the negative real part of the permitt…
The isothermal shrinkage behaviors of fine zirconia powders (containing 2.8–2.9 mol% Y 2 O 3 ) with specific surface areas of about 6 and 16 m 2 /g were investigated to clarify the effect of specific surface area on the initial sintering stage. The shrinkage of powder compact was measured under constant temperatures i…
Carbon nanotubes hold great promise for use in biomedical fields. Among numerous potential applications, including DNA and protein sensors, bioseparators, biocatalysts, and tissue scaffolds, this article emphasizes the use of carbon-nanotube-filled polymer composites as medical devices, namely, microcatheters. The cur…
We report on a first-principles investigation of the structural and vibrational properties of vitreous germania $(v\text{\ensuremath{-}}\mathrm{Ge}{\mathrm{O}}_{2})$. Our work focuses on a periodic model structure of 168 atoms, but three smaller models are also studied for comparison. We first carry out a detailed str…
Rare-earth (RE) doped III-nitrides, prepared by in-situ doping during growth or by ion implantation and annealing, are promising materials for visible light emitting displays. In addition, they are extremely challenging theoretically, on account of the complexity of the sharp inter-4f optical transitions, which are al…
In this work, we calculate the magnetocaloric effect in the series of compounds $({\mathrm{Gd}}_{x}{\mathrm{Tb}}_{1\ensuremath{-}x}{)}_{5}{\mathrm{Si}}_{4}$. We use the classical Monte Carlo simulation to deal with the $4f$ spin-spin interaction as well as the disorder at the rare-earth sites. The calculated isotherma…