Materials Literature
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Abstract A tendency to form multiferroic states with a spatially modulated antiferromagnetic structure and electric polarization in pure orthorhombic manganites RMnO 3 upon decreasing of the rare‐earth ionic radii has been realized in single crystals of substituted compounds Eu 1– x Y x MnO 3 (0.2 ≤ x ≤ 0.5) and Gd 1–…
The enzymatic degradation of chemically synthesized typical biodegradable plastics, such as poly(R,S-3-hydroxybutanoate), poly(3-caprolactone) and poly(butylene adipate), into reactive cyclic oligomers under the continuous flow of supercritical or subcritical carbon dioxide (scCO2) with toluene through an enzyme colum…
Cyclotriveratrylene (CTV) derived host molecules with ethyl, propyl, allyl or propargyl functional groups have been synthesised using standard or solventless reaction methodologies. The known structural and clathrate chemistry of cyclotriveratrylene (CTV) and these analogues has been extended. Crystal structures of th…
Ammonium lithocholate nanotubes (NHLC) have been prepared in alkaline ammonia solutions and exhibited remarkable monodisperse cross-sectional dimensions (external diameter = 52 nm) as shown by cryo-transmission electron microscopy measurements. A classical electroless metallic replication method was used with a single…
The Raman gain spectra of millimeter thick As(2)S(3) and As(24)S(38)Se(38) glasses and Ge((23 - x))Ga(x)Sb(7)S((70 - y))Se(y) with x = 0 and 5 and y = 0, 2, 5 have been measured using a direct nonlinear optics technique. The pump light originated from a picosecond Nd:YAG laser operating at 1064 nm and a tunable optica…
The combined oxidation of carbon monoxide, CH 4 , and CD 4 by molecular oxygen ( 16 O 2 and 18 O 2 ) in aqueous solutions of trifluoroacetic acid labeled with 18 O in the presence of rhodium and copper compounds and potassium iodide has been studied. The distribution of 18 O in isotopically substituted products sugges…
The conduction mechanisms in chalcogenide materials for phase-change memory (PCM) applications are studied. A trap-limited transport model for sub-threshold conduction in the amorphous chalcogenide is presented, and extended to threshold switching in the amorphous phase and transport in the highly-conductive crystalli…
The complexes [(η 1:η 1 -ind)(μ-M)R 2 ] 2 (R = Me, M = Ga ( 1 ); R = Me, M = Al ( 2 ); R = Et, M = B ( 3 )) were prepared by treatment of indazole with MR 3 in toluene. These have dimeric molecular structures, with the indazolato ligands coordinated in a η 1:η 1 fashion. In solution, complexes 1 and 2 show a mixture o…
The interplay between the structural relaxation and the rheological response of a simple amorphous system {a 80:20 binary Lennard-Jones mixture [W. Kob and H. C. Andersen, Phys. Rev. Lett. 73, 1376 (1994)]} is studied via molecular dynamics simulations. In the quiescent state, the model is well known for its sluggish…
Structural characteristics of the (Y1−xLax)2Ti2O7 system have been determined using time-of-flight (TOF) neutron and constant wavelength powder X-ray diffraction (XRD), scanning electron microscopy (SEM), electron probe micro-analysis (EPMA) and 89Y (I = ½) magic-angle spinning nuclear magnetic resonance spectroscopy…
By using functional mimics of the protein silicatein alpha together with organic structure directing agents, it was possible to produce different mesoporous and microporous molecular sieves at room temperature and neutral pH.
Published research works concerning fabric handle and its basic mechanical properties were surveyed in this review. Fabric handle and its mechanical properties have been studied continuously using KES system for various kinds of fabrics in the period between 1998 and 2005. Statistical investigation by neural network m…
Doping a small quantity of additive Bi2O3 is effective in suppressing the deliquescence of KNbO3 ceramics. When an optimized ball-milling process was included, dense and nondeliquescent KNbO3 ceramics were obtained by a conventional firing process. However, the presence of Bi prevented grain growth (<0.2 μm) and it…
Submicron- and nanometer-sized red luminescent particles (Y2O3:Eu3+) were successfully generated by flame spray pyrolysis (FSP) and the effect of the type of the atomizer, i.e., the ultrasonic nebulizer (UN) and the two-fluid nozzle (TFN) sprayer, on the particle characteristics was investigated. The prepared particle…
In this contribution we report on an in situ enzymatic self-assembly of a polyaniline (PAN) monolayer on modified hydroxyl-terminated surfaces. The consecutive assembly steps consist of a chemical deposition of 3-aminopropyltrimethoxysilane (APT) as a coupling agent with a positively-charged amine end group. The next…
In this work, a polypropylene (PP)/attapulgite nanocomposite was prepared via melt blending using a novel organically modified attapulgite (OATP). The thermal stability of PP/clay nanocomposites compared to pure PP was examined in nitrogen using a kinetic analysis. The kinetic parameters, including reaction order and…
Polycationic or neutral dendrons of generation 1 to 3 bearing protonated (or not) amino end groups and a vinyl group at the focal point as well as polyanionic or neutral dendrons of generation 1 to 3 decorated with carboxylate or carboxylic groups on their surface and exhibiting a vinyl group at the core were prepared…
The syntheses of two analogues of the bicyclic guanidinate ligand hpp (hpp = the anion of the guanidine-type compound 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2a]pyrimidine) which contain two fused rings are reported. Each compound contains one seven-membered ring while the other is either a five (Htbd) or a six (Htbu) mem…
The effect of hydrogen on fatigue crack growth behavior of four stainless steels has been investigated from the viewpoint of martensitic transformation. The crack growth rates in hydrogen-charged SUS304 and SUS316 were accelerated. The crack growth rate in hydrogen-charged SUS316L was slightly higher than uncharged SU…
The 21,23-dithia and 21-thia analogues of phlorins and mono-functionalized thiaphlorins were synthesized using easily available precursors and the mono-functionalized thiaphlorins were used further to synthesize the first examples of three covalently linked thiaphlorin-porphyrin dyads.