Materials Literature
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In this work, we present a novel method to produce thermoresponsive, monodisperse microgels which display temperature-dependent photoluminescence. The system is based on bimetallic cores of Au@Ag encapsulated within thermoresponsive poly(N-isopropylacrylamide) microgels and coated with a photoluminescent polymer (poly…
The surfaces of polycrystalline cerium oxide films were modified by histidine adsorption under vacuum and characterized by the synchrotron based techniques of core and valence level photoemission, resonant photoemission and near edge X-ray absorption spectroscopy, as well as atomic force microscopy. Histidine is stron…
A graphene and carbon nanotube (CNT) array composite was synthesized by chemical vapor deposition (CVD) and chemically treated after synthesis, yielding a novel corrugated structure, visually similar to a mushroom gill. This binder-free hybrid material was used to make an electrode that may find application in energy…
AIM: This research aimed to study the composition of epilithic diatom flora in headwater areas of the sub-basin of the Andreas stream, RS, Brazil, and their relation with eutrophication processes. METHODS: Quarterly excursions (March, June, September, December 2012 and Mach 2013) were performed in ten sampling points…
Pseudomonas oleovorans were grown on sugary cassava extracts supplemented with andiroba oil for the synthesis of a mediumchain- length polyhydroxyalkanoate (PHA MCL). The concentration of total sugars in the extract was approximately: 40 g/L in culture 1, 15 g/L in cultures 2 and 3, and 10 g/L in culture 4. Supplement…
A fabrication method by combining precision mechanical dicing and wet etching was developed to prepare micro-pyramid structures based on (Ba0.67Sr0.33)TiO3 ceramics. The effective piezoelectric properties of flexoelectric pyramid structures in ten micrometers scale were investigated and measured through converse flexo…
We build on the work of Mooney [Colloids Sci. 6, 162 (1951)] to obtain an heuristic analytic approximation to the viscosity of a suspension any size distribution of hard spheres in a Newtonian solvent. The result agrees reasonably well with rheological data on monodispserse and bidisperse hard spheres, and also provid…
Ultrathin mesoporous NiCo <sub>2</sub> O <sub>4</sub> nanosheets have been developed for highly efficient benzylic oxidation.
The enthalpy and Gibbs free energy thermodynamical potentials of single walled carbon nanotubes were studied of all types (armchairs, zig-zags, chirals (n&gt;m), and chiral (n&lt;m)). Bulk values of these thermodynamic potentials were obtained using a previously demonstrated robust method based on semi-empiric…
In this work, we fabricated the polyaniline/silver nanoparticle/multi-walled carbon nanotube (PANI/Ag/MWCNT) composites by in situ polymerization of aniline on the wall of Ag/MWCNTs with different aniline to Ag/MWCNT mass ratios. The chemical structure of the ternary composites was characterized by Fourier transform i…
Abstract Multi-walled carbon nanotubes have been synthesized at different temperatures ranging from 550 °C to 750 °C on silica supported Fe-Mo catalyst by chemical vapour deposition technique using Cymbopogen flexuous oil under nitrogen atmosphere. The as-grown MWNTs were characterized by scanning electron microscope…
Recently, the encapsulation of various species inside boron nitride nanotubes (BNNTs) was identified as an effective method for modifying the physical and chemical properties of boron nitride nanotubes (BNNTs), thus greatly widening their potential applications. In the present work, we have performed comprehensive den…
The corrosion behavior of super duplex stainless steel (SDSS) weldments which depend on Mo and W content has been studied. In order to compare the electrochemical characteristics depending on the change in the content of Mo and W, Anodic Polarization Tests were conducted in the 3.5%NaCl solution and 1M H2SO4 solution…
In this work the optimization procedure for corrosion resistance, surface analysis and electrical properties of PPy-Fe electrodes have been examined. Polypyrrole (PPy) film was electrochemically synthesized in a one step process from an aqueous solution of sodium salicylate and pyrrole with certain concentrations, dif…
Article Review on Liquid Flame Spray in paper converting: Multifunctional superhydrophobic nanoparticle coatings was published on December 1, 2014 in the journal Nordic Pulp & Paper Research Journal (volume 29, issue 4).
We study the light matter interaction in WS2 nanotube-graphene hybrid devices. Using scanning photocurrent microscopy, we find that by engineering graphene electrodes for WS2 nanotubes we can improve the collection of photogenerated carriers. We observe inhomogeneous spatial photocurrent response with an external quan…
This paper presents the flashover characteristics of snow-bridged insulators, and the related discharge propagation phenomena in the presence of salt contaminated snowstorms. Two types of flashover tests, a) Snow accretion without voltage application, then apply the voltage after snow accretion, b) Snow accretion duri…
This work was aimed to develop thermally crosslinked chitosan/PVA nanofiber mats. The CS/PVA nanofibers were fabricated using elctrospinning process. The appropriate crosslinking temperatures and crosslinking times in order to thermally crosslinked CS/PVA nanofiber and physicochemical properties of the thermally cross…
The paper is focused on the design of the electrode for needleless coaxial electrospinning. This method allows to produce core/shell nanofibers from the free surface of a polymeric two-layer. The geometry of the designed model of electrode was analyzed using the software Autodesk Simulation Multiphysics. The results o…
Abstract In this paper a novel method of SbSI single crystals fabrication is presented. In this method a sonochemically prepared SbSI gel is used as an intermediate product in a vapour growth process. The main advantages of the presented technique are as follows. First, the SbSI gel source material has lower temperatu…