Materials Literature
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Von Plättchen zu Schichten: Eine topochemische Phasenumwandlung mit Brom in Acetonitril überführt β-Co(OH)2 in monometallisches Co2+,Co3+-Schichtdoppelhydroxid (LDH) mit einem Co2+/Co3+-Verhältnis von 2:1 (siehe die Elementkarten für Co, Br und O in einem Co2+,Co3+-LDH-Plättchen mit intercaliertem Br−). Weitere Behand…
In the present study, an attempt has been made to modify pectin by grafting polyacrylamide using ammonium ceric sulphate as initiator. The effect of various variables like initiator concentration, monomer concentration, temperature and time has been studied. The grafted copolymer was characterized by Fourier transform…
We prepared ultrathin polycrystalline silicon layers (5–100nm) by the aluminum-induced layer exchange process. An Al/oxide/amorphous Si layer stack was annealed at temperatures below 577°C, leading to a layer exchange and the crystallization of the silicon. The process dynamics, structural and electronic properties ha…
Selective sulfoxidation of BEDT-TTF (bis(ethylenedithio)-tetrathiafulvalene) with enantiopure (camphoryl-sulfonyl)oxaziridine derivatives provided the inner monosulfoxide, as demonstrated using single crystal X-ray analysis, with an enantiomeric excess of 44% (up to 74% after recrystallization).
Abstract Bacterial cellulose (BC) pellicles obtained from an Acetobacter xylinum culture were disintegrated using mechanical methods to be used as reinforcement to produce biocomposite sheets with Apple and Radish Pulp. The nanosize disintegrated BC pellicles were blended with microsize apple and radish pulp in the we…
A new heterobimetallic Re(IV)Cu(II) compound has been prepared and its crystal structure determined by single-crystal X-ray diffraction; magnetic susceptibility measurements show that this compound behaves as a ferrimagnetic chain with significant antiferromagnetic interactions between Re(IV) and Cu(II) metal ions.
A simple three step method for creating ultra-thin films, which contain Ag nanoparticles, on both glass and stainless steel surfaces, is presented. First, during the immersion into N-(2-aminoethyl)-3-aminopropyl-trimethoxysilane (DIAMO) a monolayer of DIAMO is attached on the sample surface after which immersion in si…
Abstract The stability of transparent conducting Al‐ and Ga‐doped ZnO (AZO and GZO) thin films in a high humidity environment has been investigated for the purpose of finding substitutes for the indium‐tin‐oxide (ITO) thin films used in transparent electrode applications. It was found that the resistivity of polycryst…
Raman spectra of Nd doped ceria nanocrystals were measured by gradual heating and cooling over the temperature range of 293–1073K and analyzed using the phonon confinement model that incorporates inhomogeneous strain and anharmonic effects. We have demonstrated that in nanograins, four-phonon anharmonic processes are…
Abstract The aim of this study was to characterize the foaming of natural proteins as thermoplastic polymers. In particular, two proteins, one of vegetal origin, zein, and one of animal origin, gelatin, were processed to achieve thermoplastic polymers, and subsequently foamed by a gas foaming batch process. The effect…
Abstract Recycled paper shopping bag fibers were melt-compounded using a batch mixer with biobased/biodegradable polylactide (PLA) at 10 and 30 wt.% using silane as a coupling agent. These PLA/fiber composites were then injection molded to produce both solid and microcellular tensile bars. The mechanical properties (s…
We report on a dramatic improvement of the crystalline quality of ZnMgO and ZnCdO epilayers using Bridgman-grown ZnO substrates. ZnMgO alloys grow pseudomorphically over several 100nm and the (0002) ω-rocking curve width is as low as 19arcsec. Strain inhomogeneities in low-temperature grown ZnCdO are significantly red…
We have studied the temperature dependence of the F 2g Raman mode phonon frequency and broadening in CeO 2− y nanocrystals. The phonon softening and phonon linewidth are calculated using a model which takes into account the three-and four-phonon anharmonic processes. A detailed comparison of the experimental data with…
We show that thermal conductivity of packed bed of alumina nanoparticles can be as low as 0.035W∕mK which is only 35% higher than the thermal conductivity of air and is smaller than the recently reported lowest thermal conductivity of solids using disordered layered WeS2. These findings show a promising approach for m…
The design and construction of synthetic self-assembled nanostructures is, in a large part, inspired from elaborate nanostructures in biological systems. If we look at it from another angle, the self-assembled nanostructures are excellent scaffolds for exploring and modulating biological phenomena when they are suitab…
Hydrogen physisorption in different carbonaceous materials was investigated in liquid nitrogen (77 K). The total hydrogen adsorption was found to have a linear relationship with the surface area of pores <30 A. The surface area and porosity of the carbon materials were determined by dinitrogen adsorption at 77 K and d…
Nonlinear refractive index and nonlinear absorption coefficient of high-quality Mn:ZnSe nanocrystals are measured by z-scan technique at 800nm wavelength. The synthesized nanocrystals with nucleation doping have tunable wavelength (between 565–610nm), high quantum yield (∼50%), and high thermal as well as photochemica…
A family of polyoxometalates with the composition [H2V3M17O62](6-) features a Dawson-like architecture containing two tetrahedral {VVO4} templates rather than main group hetero-anions ({PO4} or {SO4} etc.) typically associated with classical heteropolyacids, situated within a mixed-metal {MVI17VIVO54} cage and these c…
We have investigated the structural and magnetic properties of $\mathrm{La}\mathrm{Co}{\mathrm{O}}_{3}$ nanoparticles prepared by a sol-gel method. A ferromagnetic order with ${T}_{C}\ensuremath{\sim}85\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ has been observed in the nanoparticles. The infrared spectra give evidence for…
A triply linked ZnII diporphyrin underwent site-selective cycloaddition reactions with thermally generated o-xylylene to provide a triply linked porphyrin-chlorin hybrid and a triply linked chlorin dimer in moderate yields. The former product is a symmetry-allowed [4+2] cycloadduct, while the latter is a symmetry-forb…