Materials Literature
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We investigate the thermopower and thermoelectric coefficient of nanogranular materials at large tunneling conductance between the grains, ${g}_{T}⪢1$. We show that at intermediate temperatures, $T>{g}_{T}\ensuremath{\delta}$, where $\ensuremath{\delta}$ is the mean energy-level spacing for a single grain, electron…
We have fabricated a ZnO nanowire (NW)/La(0.65)Sr(0.35)MnO(3) (LSMO) p-n heterojunction by growing the NWs by an easy aqueous chemical route on a pressed powdered pellet of LSMO. The NWs have hexagonal wurtzite structure with good optical emission properties. The current-voltage (I-V) curves of a single NW junction me…
Abstract The redox properties of quinones play a key part in photosynthesis and oxidative phosphorylation. This mini‐review focuses on the synthesis and properties of polymers that contain in‐chain quinone units. Many of the syntheses exploit Yamamoto or Suzuki couplings. Most of the polymers that are soluble in organ…
Abstract An Perowskit‐Hohlfasermembranen gelingt die direkte Zersetzung von N 2 O zu N 2 mit hohem Umsatz (siehe Bild), wenn der inhibierende Sauerstoff in situ entfernt wird. Durch eine gekoppelte partielle Methan‐Oxidation kann N 2 ‐freies Synthesegas erhalten werden. Dieses nachhaltige Konzept kombiniert die N 2 O‐…
Stamping operation of textile composite sheets in industry involves a process of heating and cooling of the material. In the present article, the in-plane large shear deformation of woven fabric composite sheets at elevated temperatures is studied. Using the modified ‘picture frame’ test, the effects of temperature on…
A comparison between the resonant scattering curve obtained by anomalous small-angle X-ray scattering at the X-ray absorption edge of Ni and the complementary small-angle neutron scattering curve from an Al 89 Ni 6 La 5 alloy sample is reported. The sample does not comply with the two-phase approximation. The two resu…
Abstract The star graft copolymers composed of hyperbranched polyglycerol (HPG) as core and well defined asymmetric mixed “V‐shaped” identical polystyrene (PS) and poly( tert ‐butyl acrylate) as side chains were synthesized via the “click” chemistry. The V‐shaped side chain bearing a “clickable” alkyne group at the co…
Abstract The research on polymer‐layered silicate nanocomposites is currently an expanding field of study because they often exhibit a wide range of improved properties over their unmodified starting polymers. Epoxy/organoclay nanocomposites have been prepared by intercalating epoxy into the organoclay montmorillonite…
Copper nanoparticles have been synthesized in a colloidal solution of hyperbranched polyamine by a reductive technique. The formation of Cu nanoparticles was confirmed from UV, FT-IR, XRD and TEM studies. This colloidal solution of hyperbranched polyamine/Cu nanoparticles as well as hyperbranched polyamine alone have…
The enzyme alpha-isopropylmalate synthase from Mycobacterium tuberculosis (MtIPMS) has been identified as a possible target for the design of new antitubercular therapeutics. Recently, it was shown that MtIPMS is subject to slow-onset, feedback inhibition by l-leucine, the first instance of an allosteric regulator uti…
Abstract BACKGROUND: Polyamide 6 (PA6)/hydroxyapatite (HA) nanocomposites, which combine the bioactivity and biocompatibility of HA and the excellent mechanical performance of PA6, have emerged as new biomaterials with potential applications in the clinical setting. It has been shown that these nanocomposites show goo…
We present thermopower measurements on free-standing, straight and "junctioned" gold nanowires using a micromachined thermoelectric workbench. Measurements on straight 70 nm diameter gold nanowires show a thermopower similar to that of bulk gold; however for "junctioned" gold nanowires we observed a hitherto unreporte…
Abstract BACKGROUND: The effects of filler geometry are important for understanding the internal structure and physical properties of polymer composites. To investigate the effects of filler geometry on electrical conductivity as well as morphological and rheological properties, three types of polycarbonate (PC) compo…
Abstract Styrene (St)/butyl acrylate (BA) copolymers were prepared by adding triethoxyvinylsilane (TEVS), trimethoxyvinylsilane (TMVS), and triphenylvinylsilane (TPVS), each one through emulsion copolymerization. The polymerization was performed with methacrylic acid and auxiliary agents at 80°C in the presence of pot…
We have demonstrated a covalent route toward site-selective synthesis of MWNT−nanoparticle conjugates containing two different types of nanoscale species, i.e., Au nanoparticles and CdSe QDs. We have quantitatively probed the effects of varying oxidation treatments, precursor concentrations, and incubation times in or…
In order to enhance the dispersion ability of hydrophobic nanoparticles in water while maintaining their unique properties, we utilized poly(ethylene glycol) grafted hyperbranched poly(amido amine) (h-PAMAM-g-PEG) to modify three types of hydrophobic nanoparticle, CdSe, Au, and Fe(3)O(4), and transferred them into wat…
Abstract Banana starch was oxidized at three different levels and then acetylated. The double‐modified starch was used for film preparation. The physical, mechanical, and barrier properties were tested. The oxidation level increased the whiteness of the film, and the second modification (acetylation) did not affect th…
A multicomponent framework for energy conserving dissipative particle dynamics (DPD) is presented for the first time in both dimensional and dimensionless forms. Explicit definitions for unknown scaling factors that are consistent with DPD convention are found by comparing the present, general dimensionless governing…
Abstract Polystyrene (PS)/organomontmorillonite nanocomposites were prepared by melt processing with a twin‐screw extruder. Sodium montmorillonite was organically modified with stearyl trimethyl ammonium chloride to evaluate the effect of clay modification on the performance of the nanocomposites. A comparative accoun…
For making a photoinduced crystal growth method more universal, we have investigated the key parameters for polycrystalline nucleation from an amorphous matrix of LaMnO 3 with focus on the pulsed photothermal heating time under excimer laser irradiation. We have clearly demonstrated that effective annealing time ( t e…