Materials Literature
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We have performed synchrotron radiation x-ray and neutron diffraction measurements on magnetoelectric multiferroic ${\text{CuFe}}_{1\ensuremath{-}x}{\text{Al}}_{x}{\text{O}}_{2}$ $(x=0.0155)$, which has a proper helical magnetic structure with incommensurate propagation wave vector in the ferroelectric phase. The pres…
We present the synthesis, crystal structure, hardness, IR/Raman and UV/Vis spectra, and FP-LAPW calculations of the electronic structure of Li(2)B(12)Si(2), the first ternary compound in the system Li/B/Si. Yellow, transparent single crystals were synthesized from the elements in tin as solvent at 1500 degrees C in h-…
Based on the low-energy band structure of carbon nanotubes (CNs), we develop a generalized Fowler-Nordheim theory of the CN field emission, in which the behavior of the current-voltage (I-V) characteristics depends on the electric field and the diameter of the CNs. This formalism reveals the key differences of field e…
The self-assembly in aqueous solution of a PEG-peptide conjugate is studied by spectroscopy, electron microscopy, rheology and small-angle X-ray and neutron scattering (SAXS and SANS). The peptide fragment, FFKLVFF is based on fragment KLVFF of the amyloid beta-peptide, Abeta(16-20), extended by two hydrophobic phenyl…
Abstract The effect of pristine silica nanoparticles on a model low‐density polyethylene (LDPE)–ethylene vinyl acetate copolymer (EVA) thermoplastic elastomer blend system is explored in this article. Pristine silica nanoparticles were melt‐blended with the LDPE–EVA system at 1.5, 3, and 5 wt % loadings through the va…
Fest verbunden: Diblockmoleküle mit einem Y-förmigen aromatischen Segment, einem linearen Polyethylenoxid-Kopf und verzweigten Alkylketten als Schwanz wurden synthetisiert. In wässriger Lösung aggregieren sie zu zylindrischen Fasern (siehe Bild). Das Einlagern eines aromatischen Gasts löst ein laterales Stapeln der Ag…
Abstract The effects of incorporation of three different fillers, i.e., rice husk ash (RHA), silica, and calcium carbonate (CaCO 3 ), over a loading range of 0–60 phr on the curing characteristics, processability, mechanical properties, and morphology of 75 : 25 natural rubber (NR)/ethylene‐propylene‐diene monomer (EP…
Dielectric response and nonlinear conduction are studied in an organic conductor β-( meso -DMBEDT-TTF) 2 PF 6 , which undergoes the metal–insulator transition caused by the checkerboard-type charge ordering (CCO). The formation of the long-range CCO (LR-CCO) was observed as a sudden increase in the dielectric constant…
Abstract A preceramic polymer for SiBNC fiber, polyborosilazane, has been synthesized by one‐step condensation reaction of dichloromethylsilane, BCl 3 , and hexamethyldisilazane with high yield. The reaction mainly involves the condensation of SiCl and BCl with NSiMe 3 followed by SiMe 3 Cl evaporation and dehyd…
This study concerns an experimental investigation of room-temperature creep at different stresses in polycrystalline ${\text{LaCoO}}_{3}$-based oxides under compression. A phenomenological approach for ferroelastic creep is proposed to identify the most important parameters that affect creep strain over different time…
Dissipative particle dynamics (DPD) simulation technique is an effective method targeted on mesoscopic simulations in which the interactions between particles are soft. As a result, it inevitably causes bond crossing and interpenetration between particles. Here we develop a practical method based on the two-dimensiona…
ABSTRACT The response surface methodology (RSM) was used in the optimization of a modified recipe of almond paste cookies to pinpoint the best combination of the most important factors, in order to obtain an enhanced product with quality characteristics similar to the typical one. In this modified recipe, bamboo fiber…
Abstract Reactions between hydroxyl‐terminated glycidyl azide polymer (GAP) and different isocyanate curatives such as toluene diisocyanate (TDI), isophorone diisocyanate (IPDI), and methylene diicyclohexyl isocyanate (MDCI) at various temperatures viz. 30, 40, 50, and 60°C were followed by Fourier transform infra red…
A flux-assisted thermal conversion route to the pore-free high crystallinity magnesium borate (Mg 2 B 2 O 5 ) nanowhiskers with a length of 0.47−3.0 μm, diameter of 50−240 nm, and aspect ratio of 5−36 at a relatively low temperature of 650−700 °C (200−350 °C lower than that needed via the traditional method) was devel…
Abstract In this study, biodegradable rigid cellular materials were synthesized from the reaction of malonic acid with epoxidized soybean oil. Malonic acid reacts with two epoxy groups to give a network polymer. In the course of this reaction, initially formed malonic acid monoester (MAME) can decarboxylate and produc…
Abstract The isothermal and nonisothermal crystallization behavior of Nylon 12 was investigated using differential scanning calorimetry (DSC). An Avrami analysis was used to study the isothermal crystallization kinetics of Nylon 12, the Avrami exponent ( n ) determined and its relevance to crystal growth discussed and…
Multiwalled carbon nanotube (MWNT) microspheres were fabricated by layer-by-layer (LBL) assembling of modified MWNTs and poly(diallyldimethylammonium chloride) (PDDA) via electrostatic interactions on poly(methacrylic acid) (PMAA) microspheres and subsequent calcination. The MWNT/PDDA film growth on planar substrates…
Abstract Crystal growth in solution is a surface‐controlled process. The variation of growth rates of different crystal faces is considered to be due to the molecular arrangement in the crystal unit cell as well as the crystal surface structures of different faces. As a result, for some crystals, the growth rate for a…
A simple catalytic system that uses commercially available manganese(II) perchlorate as the catalyst and peracetic acid as the oxidant is found to be very effective in the epoxidation of aliphatic terminal alkenes with high product selectivity at ambient temperature. Many terminal alkenes are epoxidised efficiently on…
Abstract Two new inorganic–organic hybrid germanotungstates built from trivacant Keggin fragments and in situ generated hexanickel clusters [Ni(en) 2 ] 0.5 [{Ni 6 (μ 3 ‐OH) 3 (en) 3 (H 2 O) 6 }(B‐α‐GeW 9 O 34 )] · 3H 2 O ( 1 ) and [{Ni 6 (μ 3 ‐OH) 3 (dap) 3 (H 2 O) 6 }(B‐α‐GeW 9 O 34 )] · H 3 O · 4H 2 O ( 2 ) (en = et…