Materials Literature
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Expanded polyvinyl-alcohol (PVA) was successfully prepared using a similar process to that of starch expansion. The addition of an iodine solution was necessary to facilitate expansion and led to surface areas of up to 143.1 m2 g−1. The use of recycled material from LCD screens required no additional iodine and produc…
The rate and activation parameters for oxygen exchange of the mu(3)-oxo bridges in a manganese tetranuclear cluster with H(2)(18)O have been measured by ESI-MS; the observed DeltaS(double dagger) of -146 +/- 22 J K(-1.)mol(-1) is consistent with the expected associative mechanism of substitution.
Poly(L-lactide) was obtained from the ring-opening polymerization of L-lactide through a solvothermal process. Tin (II) chloride (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mtext>SnC</mml:mtext><mml:msub><mml:mn>1</mml:mn><mml:mn>2</mml:mn></mml:msub></mml:math>) was used as the catalyst for the pol…
The growth of tin sulfide (SnS) films with large surface area have been accomplished. A uniform nanowall SnS thin film over the entire substrate was achieved by using an economic chemical bath deposition method and observed by scanning electron microscopy. Microstructure, phase confirmation, and optical properties wer…
The heat capacity of EuPO 4 was measured by adiabatic calorimetry over the temperature range 9.81–298.48 K. The experimental and literature data were generalized to obtain the temperature dependence of the heat capacity of europium orthophosphate from 0 to 1600 K. This dependence was used to calculate thermodynamic fu…
The nanoscopic electrical properties of LiAlSiO(4) glass ceramics with different degrees of crystallinity chi were studied by means of time-domain electrostatic force spectroscopy (TDEFS). Thereby, a faster relaxation process due to lithium ion movements in the glassy phase and a slower process due to lithium ion move…
Regenerated cellulose fiber (RN) and natural fiber (pine wood fiber (PW)) filled ε-polycaprolactone (PCL) compound, PCL/RN (90/05 and 75/25 wt%) and PCL/PW (90/05, 75/25 and 50/50 wt%), are investigated with regard to interfacial adhesion, rheological properties, morphology, nucleation and mechanical properties. The i…
Small-diameter ZnO nanorods have been prepared from aqueous solution containing ions, manganese acetate, and sodium dodecyl sulfate in at room temperature. The added ions are considered to lead to the formation of nanoparticles, which serve as the nucleation sites, to facilitate the growth of small diameter ZnO nanoro…
The possibility to substitute wood by hemp for the production of wood based panels and the possibility to produce lightweight panels by using hemp are the main research focuses of this project. The regular density of three-layered particleboards (650 kg/m³) shall be decreased to less than 400 kg/m³ by the utilisation…
This communication describes a facile and mild chemical etching method for resizing of CdTe nanocrystals, which provides a possible approach for tailoring the size-dependent properties of the nanocrystals.
A spray-drying process was applied to the mass-production of mesoporous silica particles. The applied nozzle pressure and amount of solvent in the precursor solution were varied to control the average particle size. The particle-size distribution showed a bell curve with a normal distribution. As the nozzle pressure w…
The local structure of the Gly rich region in synthetic model peptides of spider dragline silk was analyzed with solid-state NMR and no dominant secondary structure was revealed.
The microstructure and cracking characteristics of MIG welded magnesium alloy (AZ91D) joint, and the effect of welding speed on cracking susceptibility have been investigated. The welded joint consists of primary α-Mg and divorced phases (eutectic α-Mg+eutectic β-Mg17Al12), the latter mainly distributing along the α-M…
A procedure was developed for the modification of the manganese-oxide catalyst hopcalite GFG allowing the new quality, water resistance of granules, to be reached. This procedure can be used for the reactivation of the exhausted catalytic contact.
Multi-responsive amphiphilic gold nanoparticles (AuNPs) protected by graft poly(ether amine) have been prepared simply by a one-pot photochemical synthesis in the presence of thio-graft poly(ether amine) (gPEA-SH) and the mechanism was studied in detail.
Replacing the commonly used indium tin oxide (ITO) with a thin metal layer as a quasi-transparent electrode leads to enhancement and acceleration of the electrochromic response of WO(3), as otherwise there is an electronic activation barrier at the interface between WO(3) and the ITO electrode, impeding fast electron…
Polímeros sintéticos são largamente utilizados em diversos produtos devido às suas propriedades físicas, químicas e facilidade de transformação. O poli(cloreto de vinila), conhecido como PVC, é um dos polímeros mais versáteis desenvolvidos pelo homem, de grande utilidade para a sociedade moderna. Suas aplicações inclu…
INDIVIDUAL ANIONIC ADSORPTION AND DESORPTION BY PEDOGENIC GIBBSITE. Anion adsorption/desorption dynamics was studied as individual processes on surface of particles of a gibbsitic clay. The data suggest a remarkable gibbsite role as nitrate leaching retardant in soil. The opposite behavior of gibbsite towards adsorpti…
The stoichiometric reaction of [Rh(COD)Cl](2) with the anion resulting from the deprotonation of dppm(BH(3))(2) yielded a new alkyl Rh(I) complex; the coordination modes of the BH(3) groups are discussed on the basis of X-ray data, variable temperature multinuclear NMR experiments and DFT studies.
Abstract This mini-review focuses on the recently discovered nanomeshes and nanotemplates made from carbon, boron nitride and their mixtures with a thickness of just a single atomic layer. Typically they exist on some transition metal or semiconductor substrate, the interaction with it playing a crucial role in nanopa…