Materials Literature
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In situ Raman experiments together with transport measurements have been carried out in single-walled carbon nanotubes as a function of electrochemical top gate voltage $({V}_{g})$. We have used the green laser $({E}_{L}=2.41\text{ }\text{eV})$, where the semiconducting nanotubes of diameter $\ensuremath{\sim}1.4\text…
The work reported in this article was initiated by the IUPAC Subcommittee ‘Structure and Properties of Commercial Polymers’ to study the ‘Structure and properties of linear and cross-linked structural poly(vinyl chloride) (PVC) foams’, and intends in particular to give a good understanding of the compressive response…
We have investigated the effects of tuning the localized surface plasmon resonances (LSPRs) of silver nanoparticles on the fluorescence intensity, lifetime, and Raman signal from nearby fluorophores. The presence of a metallic structure can alter the optical properties of a molecule by increasing the excitation field,…
Abstract The adhesion of L929 cells to poly(ϵ‐caprolactone) (PCL) nanofibers was successfully improved via coating with polyelectrolyte multilayer thin films (PEMs), which enhanced the potential of this material as a scaffold in tissue engineering applications. With the electrostatic self‐assembly technique, poly(dial…
Abstract Poly(trimethylene terephthalate) (PTT) nanocomposites containing multi‐walled carbon nanotubes (MWNTs) were prepared using a melt‐blending process. Acrylic acid‐grafted PTT (PTT‐ g ‐AA) and multihydroxyl‐functionalized MWNTs (MWNTs−OH) were used to improve the compatibility and dispersibility of MWNTs within…
Abstract The metallized hybrid nanofiber webs were prepared by using a combined technology of electrostatic spinning and metallization. The electrospun polyurethane (PU) nanofibers were metallized with different thicknesses of copper layer via metal vapor deposition technique. The thickness of the copper layer, which…
Recent interests on the plastic deformation of strontium titanate (SrTiO 3 ) are derived from its unusual ductile‐to‐brittle‐to‐ductile transition (DBDT). The transition is divided into three regimes (A, B, and C) corresponding to the temperature range of 113–1053 K (−160° to 780°C), 1053 to ∼1503 K (780° to ∼1230°C),…
We report a radio frequency magnetron sputtering method for producing TiO(2) shell coatings directly on the surface of ZnO nanorod arrays. ZnO nanorod arrays were firstly fabricated on transparent conducting oxide substrates by a hydrothermal route, and subsequently decorated with TiO(2) by a plasma sputtering deposit…
Abstract Cationization of cellulose under aqueous alkaline conditions was studied. Two new epoxy reagents, N ‐oxiranylmethyl‐ N ‐methylmorpolinium chloride and 2‐oxiranylpyridine, were used for preparation of cationic cellulose ethers. Using the first agent, cationic ethers were obtained in one step, whereas the latte…
Abstract The surface of PLA fabric has been successfully modified by pulsed plasma polymerization of heptylamine (PPHA) giving increased hydrophilicity and achieving a sufficient level of primary amine functionality (3.5%) for practical application in biotechnology. This is the first report that the density of primary…
Abstract BACKGROUND: Until recently, hyperbranched polymers were thought to be ill‐defined materials that were not useful as building blocks for well‐defined complex polymer architectures. It is a current challenge to develop strategies that offer rapid access to well‐defined hyperbranched block copolymers. RESULTS: A…
The selective oxidation of alkanes as a green process remains a challenging task because partial oxidation is easier to achieve with sacrificial oxidants, such as hydrogen peroxide, alkyl hydroperoxides or iodosylbenzene, than with molecular oxygen or air. Here, we report on a heterogeneous catalyst for n-hexadecane o…
In situ measurement of boson peak in several glasses was performed during the crystallization process to elucidate crystallization dynamics. In this study, it was experimentally illustrated that a drastic decrease in elasticity and damping of the boson peak occurred during the crystallization process when $T/{T}_{g}\e…
We report a systematic study on the effect of partial substitution of Sc 3+ by Ti 4+ in Sr 2 ScFeAsO 3 , Ca 2 ScFeAsO 3 and Sr 3 Sc 2 Fe 2 As 2 O 5 on their electrical properties. High levels of doping result in an increased carrier concentration and lead to the appearance of superconductivity with the onset of T c up…
Abstract Polylactide (PLA) and calcium carbonate (CaCO 3 ) were melt blended using a twin‐screw extruder. The morphology of PLA/CaCO 3 composites was observed by scanning electronic microscopy. The linear and nonlinear shear rheological behaviors of PLA/CaCO 3 melts were investigated by an advanced rheology expended s…
The electronic structure characteristics of supramolecular functionalization of graphene nanoribbons with π-conjugated polymers are investigated using first-principles density functional theory. Noncovalent polymer functionalization leads to distinct changes in the electronic properties, particularly the band gaps of…
Abstract The effect of hydrophilic nanoparticles (oxidized cellulose nanocrystals (CNC) and montmorillonite nanoclay) on the properties of a sodium carboxymethylcellulose (CMC)/hydroxyethylcellulose (HEC) hydrogel system was investigated. Visually, the CNC reinforced cellulosic hydrogel‐composites were transparent ove…
Dense Nb 2 AlC ceramic was synthesized from NbC, Nb, and Al powder mixture at 1650°C and a pressure of 30 MPa for 90 min using an in situ reaction/hot‐pressing method. The reaction kinetics, microstructure, physical, and mechanical properties of the fabricated material were investigated. A thermal expansion coefficien…
Several procedures for the demetalation of silver(III) corrolates have been tested. Acidic conditions induce removal of the silver ion but they can also promote concomitant oxidation of the corrole nucleus to an isocorrole species, the degree of which will depend upon the specific acidic media. This oxidation cannot b…
We report narrow-band absorption enhancement of semiconductor nanocrystals via Förster resonance energy transfer from cyanine J-aggregates. These J-aggregated dyes associate electrostatically with short quantum-dot (QD) surface ligands in solution. Energy transfer efficiencies approach unity for this light sensitizati…