Materials Literature
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Abstract Summary: The deposition and the nanostructure of polyelectrolyte multilayers (PEM) of branched poly(ethyleneimine)/poly(acrylic acid) (PEI/PAC) was studied in dependence of the adsorption time (t ADS ) of the individual steps. PEM were reproducibly deposited applying up to z = 20 adsorption steps at the fixed…
TiO 2-δ nanoparticles are synthesized by the sol-gel method and annealed under different reducing atmosphere. The x-ray diffraction patterns show that anatase is the dominant phase with small amounts of the rutile phase of TiO 2-δ for all the samples. Magnetic measurements indicate that the samples annealed in reducin…
New eco-composites were prepared from castor oil polyurethane reinforced with Luffa cylindrica fibres. These fibres were used without treatment as well as after mercerisation and mercerisation/benzylation surface treatments. TG curves of mercerised Luffa showed a small increase in thermal stability, associated with th…
Mn(x)Zn(1-x)Fe(2)O(4)-based magnetic fluids with x = 0.1-0.9 are synthesized by coprecipitation. The samples are heated in a radio frequency (rf) magnetic field using an rf generator at different powers, and the temperature is measured as function of time using an optical thermometer. The heating effect of the dispers…
The field emission (FE) properties of ZnO and NiO-coated ZnO (NiO∕ZnO) nanorods are investigated under vacuum of 7×10−7Torr and oxygen rich vacuum of 1×10−5Torr. The ZnO nanorods were synthesized on a Si(100) substrate by metal-organic chemical vapor deposition, and the NiO film with the thickness of ∼15nm was coated…
Single-crystalline cooperite (PtS) with a nearly stoichiometric composition was characterized in detail by X-ray diffraction, electron-probe X-ray microanalysis, and high-resolution scanning electron microscopy. For the first time it was demonstrated that 195Pt static and MAS NMR spectroscopy can be used for studying…
The geometrical property of an atomic structure model of the Yb–Cd icosahedral quasicrystal is discussed from the higher-dimensional viewpoint. An occupation domain for the framework that specifies the arrangement of the three building units of the structure is presented based on a specific archetype occupation domain…
Abstract Summary: A novel combinatorial, high‐throughput experimentation (HTE) setup has been developed, which allows for rapid mapping of the phase behavior of blends of homopolymers and block copolymers. The principle is based on the preparation of composition ( ϕ )‐temperature (T) gradient films. Linear ϕ gradients…
Abstract New optical rewritable (ORW) electronic paper is the joint result of advanced photoalignment of liquid crystals, optical engineering and flexible LCD technologies. We report improvement of both dark and bright states of reflective ORW e‐paper by doping LC with fluorescent dye, which absorb blue light & em…
Systematic investigation of structural, chemical, and magnetic properties of Co and Mn-doped Ge (001) as a function of doping concentration reveals that codoping with Co can dramatically reduce phase separation and diffusion of Mn within the Ge lattice while it magnetically complements Mn. The measured strain states i…
Several aspects of anelastic deformation of glassy polymers that cannot be explained in terms of existing theories are considered. Resemblance in the stress-strain response for solids of various natures and structures, including semicrystalline and glassy polymers, organic and inorganic solids, and low-molecular-mass…
Serpentinite‐derived soils give rise to botanically distinct systems primarily because of inadequate parent material Ca content. We hypothesized that Ca content varies widely in what have been mapped as soils derived from serpentinite. An exchangeable Ca/Mg ratio <0.7 is often used to relate the imbalance of these…
The influence of synthesis conditions on the phase composition and texture of porous nickel supports as plates with a magnesium oxide underlayer were investigated by X-ray diffraction, low-temperature nitrogen absorption, and electron microscopy combined with X-ray microanalysis. Nickel catalysts supported on these pl…
Psammothidium abundans (Manguin) Bukhtiyarova & Round was described 50 years ago from the sub-Antarctic Kerguelen archipelago (southern Indian Ocean). Apart from single occurrences in South Africa, southern Australia and Tierra del Fuego, the reported distribution of this species is restricted to the (sub-)Antarctic R…
The three most important americium isotopes, 241Am, 242mAm, and 243Am originate in the nuclear fuel of pressurized water reactors (PWRs), fast reactors (FRs), or accelerator-driven systems (ADSs) in a ratio of 241Am/243Am between ~0.45/0.55 to ~0.85/0.15. The content of 242mAm in the spent fuel of PWRs, FRs, and ADSs…
The corrosion inhibition of aluminum in hydrochloric acid solution in the presence of ethyl trimethyl ammonium bromide (ETMAB) at temperature range of 30-50oC was studied using the weight loss and polarization techniques. The effect of addition of anions (I-, SCN-, Br-) is also reported. The inhibition efficiency (%IE…
Abstract Photochromic diarylethene regioisomers having benzothiophene and benzofuran rings were synthesized and their structures were confirmed by X-ray crystallography. The photochromic properties of these diarylethenes were examined in solution as well as in the single-crystalline phase. We found that a diarylethene…
Abstract Photochromic ruthenium polypyridyl complexes whose action is based on an excited state linkage isomerization are discussed. Picosecond transient absoption spectroscopic data indicate that isomerization occurs along the charge-transfer manifold. These studies indicate that rotation about the Ru–S bond is an im…
Bi3+ doped YBO3 phosphors are prepared by solid state reaction and their luminescent properties are investigated by using synchrotron radiation instrument. Concentration and temperature dependences of YBO3:Bi3+ luminescence under VUV/UV excitation is observed. The emission and excitation spectra are assigned, and the…
Poly(lactic acid) (PLA)/organo-montmorillonite (OMMT) nanocomposites were prepared by using solution intercalation and melt intercalation methods. For solution intercalation method, toluene was used as solvent. For melt intercalation method, PLA/OMMT composites were prepared by using single-screw extruder. The flexura…