Materials Literature
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The size-dependent structure of CdSe nanoparticles, with diameters ranging from $2\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}4\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$, has been studied using the atomic pair distribution function (PDF) method. The core structure of the measured CdSe nanoparticles can…
We report herein the preparation and UV-stimulated wettability conversion of superhydrophobic TiO 2 surfaces, as well as the preparation of superhydrophilic−superhydrophobic patterns by use of UV irradiation through a photomask. A CF 4 plasma was used to roughen smooth TiO 2 sol−gel films to produce a nanocolumnar mor…
We study RKKY interactions between local magnetic moments for both doped and undoped graphene. In the former case interactions for moments located on definite sublattices fall off as 1/R2, whereas for those placed at interstitial sites they decay as 1/R3. The interactions are primarily (anti)ferromagnetic for moments…
Ever since the discovery of carbon nanotubes, researchers have been exploring their potential in biological and biomedical applications. The recent expansion and availability of chemical modification and bio-functionalization methods have made it possible to generate a new class of bioactive carbon nanotubes which are…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplex Hydrides for Hydrogen StorageShin-ichi Orimo, Yuko Nakamori, Jennifer R. Eliseo, Andreas Züttel, and Craig M. JensenView Author Information Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan, Hawaii Hydrogen Carriers, LLC, Honolulu, Hawaii 96…
Abstract The preparation and thermal and thermo‐mechanical properties of nanocomposites based on liquid‐crystalline polymers (LCP) and organically‐modified layered silicate (OMLS) is described. From XRD patterns, very little smectic ordering is present in the pure LCP; in the nanocomposites, the polymer chains tended…
Amorphous CdSe nanoparticles were prepared by a room-temperature reaction between selenourea and cadmium nitrate and subsequently crystallized by heating at 145 °C in pyridine. Prolonged heating at this temperature did not result in nanocrystal growth, while the addition, before the heating step, of very small amounts…
The internal friction and shear modulus at low frequency together with the electrical and magnetic properties have been measured for an ordered oxygen-deficient perovskite ${\mathrm{GdBaCo}}_{2}{\mathrm{O}}_{5+\ensuremath{\delta}}$ ceramics ($\ensuremath{\delta}=0.005$, 0.499, and 0.515). For $\ensuremath{\delta}=0.00…
In this paper, we present a new strategy to functionalize the surface of high-density polyethylene plates using a cold plasma technique and chlorinated phosphazenes as coupling agents. The clean surface of polyethylene samples was modified by argon plasma treatments to introduce polar groups (e.g., C O, COOR, OR, OH,…
Abstract Reactive extrusion and solid acid catalysis technologies were adopted in the pentaerythritol–melamine phosphate (PER‐MP) reaction to synthesize intumescent flame retardant, melamine salt of pentaerythritol phosphate (MPP), which was applied in flame retardant polypropylene (PP). This environment‐friendly synt…
A new bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF)-based salt with a ferrocenyl moiety, alpha' ''-(BEDT-TTF)(4)(Fe(C(5)H(4)SO(3))(2)).6H(2)O, has been prepared. The ferrocenyl part of this salt is neutral and diamagnetic, but the magnetic susceptibility is well modeled by a Curie-Weiss law with C = 0.142 emu.K.mol…
Abstract A modification of the polyol method has been shown to result in improved efficiency and enhanced kinetics for the synthesis of silver nanocrystals when compared with the traditional polyol method. The Ag nanocrystals produced were characterized using X‐ray diffraction and transmission electron microscopy. Acc…
Abstract In this research, the effect of crystalline fraction of polypropylene (PP) on cell nucleation behavior was overcome by an introduction of solvent‐plasticized step to the microcellular foaming in a solid‐state batch‐foaming process. Utilizing the plasticization performance of the solvent facilitated the PP to…
We present an elementary proof concerning reciprocal transmittances and reflectances. The proof is direct, simple, and valid for the diverse objects that can be absorptive and induce diffraction and scattering, as long as the objects respond linearly and locally to electromagnetic waves. The proof enables students who…
Abstract This article describes the preparation of multicolored reflective electrochromic displays (R‐ECDs) through the control of the substituents on viologen molecules. Cyanophenyl, salicylic, and alkyl groups were introduced onto 4,4′‐bipyridine. The synthesized viologen moieties were reacted with methyl chloride f…
The decawolframate anion reduced by two electrons, W10O326-, is diamagnetic, and its two "extra" electrons delocalize mainly among its eight equatorial wolfram sites. In this work, we combine a phenomenological Hamiltonian with first-principles calculations to explain the origin of these properties. Through ab initio…
Drug resistance is a major cause of treatment failure in cancer chemotherapy, including that with the extensively prescribed antimetabolite, 5-fluorouracil (5-FU). In this study, we tried to reverse 5-FU resistance by using a double-punch strategy: combining 5-FU with a biochemical modulator to improve its tumoural ac…
Independent control of density and diameter of carbon nanotubes (CNT) is achieved by catalytic growth from iron nanoparticles pre-defined by inert gas condensation. This two-stage process offers the opportunity to investigate the particles prior to the CNT growth, thereby providing deeper insight into the growth mecha…
Abstract A numerical method based on an integro‐differential formulation is proposed for solving a one‐dimensional moving boundary Stefan problem involving heat conduction in a solid with phase change. Some specific test problems are solved using the proposed method. The numerical results obtained indicate that it can…
Activity experiments using GC analysis of reactor effluent have been combined with in situ IR spectroscopy to elucidate the reaction steps in the destructive adsorption of CHCl3, CH2Cl2, and CH3Cl over LaOCl. The IR results show that during reaction, LaOCl is covered with carbonate, formate, and methoxy groups. The re…