Materials Literature
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Abstract Novel electrochromic polymers were prepared by the click postfunctionalization of poly(4‐azidomethylstyrene) with alkyne‐containing aromatic amine units in the presence of Cu(I) catalysts. Two kinds of aromatic amine units, tris(4‐alkoxyphenyl)amine and N , N , N ′, N ′‐tetraphenyl‐ p ‐phenylenediamine, were…
The synthesis of a highly crystalline graphite-like new material with an interlayer separation of 2.8 Å is demonstrated by re-stacking GO sheets in the form of a thin film. The optical absorption spectra and electrical data indicate that the new crystal phase is an indirect zero gap semiconductor.
PLA MPs are prepared via a novel and toxic-chemical-free fabrication route using ethyl lactate, a green solvent and FDA-approved aroma. MPs are obtained by a solution jet break-up and solvent displacement method. Adjusting flow parameters allows the tuning of MPs size between 60 and 180 µm, with reduced polydispersity…
As a weak base, β-glycerophosphate (β-GP) was used to spontaneously initiate gelation of quaternized cellulose (QC) solutions at body temperature. The QC/β-GP solutions are flowable below or at room temperature but gel rapidly under physiological conditions. In order to clarify the sol-gel transition process of the QC…
The syntheses and photophysical/photochemical properties of two amide-tethered coumarin-labeled nicotinamides are described. Photochemical studies of 6-bromo-7-hydroxycoumarin-4-ylmethylnicotinamide (BHC-nicotinamide) revealed an unexpected solvent effect. This result is rationalized by computational studies of the di…
This work presents results on the sorption of the azo dyes Remazol Yellow GR110 and Remazol Golden Yellow RNL onto calcined MgAl-CO3 hydrotalcite under different pH (7 and 11) and temperature (25°C and 40°C) conditions. In addition to isotherm and kinetic data, this work also shows results on two techniques (thermal a…
This study investigates the issues involving reinforcement of isotactic polypropylene (iPP) spun fibers by molecular adducts originating from the synergistic interactions of polyhedral oligomeric silsesquioxane (POSS) containing silanol functionalities (silanol–POSS) and di(benzylidene)sorbitol (DBS). The molecular ad…
We present a study of the effect of very high pressure on the orthorhombic perovskite GdMnO${}_{3}$ by Raman spectroscopy and synchrotron x-ray diffraction up to 53 GPa. The experimental results yield a structural and insulator-to-metal phase transition close to 50 GPa, from an orthorhombic to a metrically cubic struc…
Reduction of the graphenic edges of annealed nanodiamond by sodium in liquid ammonia leads to a nanodiamond salt that reacts with either alkyl or aryl halides by electron transfer to yield radical anions that dissociate spontaneously into free radicals and halide. The free radicals were observed to add readily to the…
In this study, microemulsion and hydrothermal methods were used together to obtain controlled particle size and uniform distribution of zinc oxide/activated carbon nano-composite materials. Precursors of zinc oxide/activated carbon were prepared using a microemulsion of an oleic acid/n-Butanol/sodium hydroxide solutio…
SUMMARY The structures and constituents of fire residue of high‐impact polystyrene/organically modified montmorillonite (HIPS/OMMT) nanocomposite during burning was investigated using scanning electron microscopy, thermogravimetric analysis, X‐ray diffraction analysis, and elementary analysis techniques and based on q…
Ni50Mn37Sn13 ribbons were produced by the melt-spinning method. Structure and magnetic measurements on the Ni50Mn37Sn13 ribbons indicated that it is ferromagnetic below 340 K and undergoes an austenitic-to-martensitic phase transition just below room temperature. The austenitic phase has the cubic L21 structure, with…
We demonstrate the existence of a charge-density-wave (CDW) associated with an incommensurate periodic lattice distortion on Ni${}_{2}$MnGa surface in the ferromagnetic state. Our temperature-dependent photoemission spectra provide compelling evidence of a pseudogap at the Fermi level for ${T}_{\mathrm{CDW}}$ $\ensure…
X-ray magnetic circular dichroism (XMCD) measurements on HoCo2 reveal the inversion of Co moment at temperatures higher than the critical temperature, Tc, showing that the net magnetization under a field of the Ho and Co sublattices remain antiparallel even above Tc. The Ho moment also changes its orientation to align…
Abstract A diglycidyl ether type epoxy resin from bisphenol A, E‐51, was cured by methylhexahydrophthalic anhydride (MeHHPA) and then decomposed in near‐critical water without any additives. The effects of the experimental parameters such as the reaction temperature, reaction time, pressure, and feedstock ratio on the…
A series of 5,10,15-tris(pentafluorophenyl) doubly N-confused bilanes were synthesized in a stepwise manner with the aid of sterically demanding N-protecting groups, in which the difference in reactivity between regular pyrrole and N-confused pyrrole plays a crucial role in the synthetic strategy. Some doubly N-confus…
The effects of agitation and aeration rates on copolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(3HB-co-3HV)] production by Azohydromonas lata MTCC 2311 using cane molasses supplemented with propionic acid in a bioreactor were investigated. The experiments were conducted in a three-level factorial design by va…
Iron-substituted crown-type polyoxometalate (POM) [P(8)W(48)O(184)Fe(16)(OH)(28)(H(2)O)(4)](20-) has been successfully immobilized onto glassy carbon electrode surfaces by means of the layer-by-layer (LBL) technique employing the cationic redox active dye, methylene blue (MB). The constructed multilayers exhibit pH-de…
First-principles calculations of the geometric and electronic structures of a single layer of molybdenum disulfide (MoS${}_{2}$) on Cu(111) utilizing the van der Waals density functional show three energetically equivalent stacking types and a Moir\'e pattern whose periodicity is in agreement with experimental finding…
Sonochemical synthesis of platinum nanoparticles (Pt NPs) in formic acid solutions and pure water was investigated using a 20 kHz ultrasonic irradiation. The obtained results gave new insights on the underneath Pt(IV) reduction mechanism in formic acid media under argon and in pure water under Ar/CO atmosphere. It was…