Materials Literature
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Abstract A multifunctional polymerizable ionic liquid, diallyldimethylammonium tetrafluoroborate (DADMA BF 4 ), is used in a one‐pot synthesis of novel luminescent polymer‐nanoparticle composites. First, small monodisperse lanthanide fluoride nanoparticles are formed by microwave irradiation in the presence of Ln(OAc)…
The utilization of nitrile glove waste will spark a great deal of interest in the rubber industry in developing cost-effective techniques to convert waste and used rubber into a processable form. Blends of styrene butadiene rubber/recycled acrylonitrile butadiene rubber (SBR/NBRr) reinforced at 85/15 blend with differ…
A number of polymer composite films using polyvinyl alcohol (PVA) as the preorganized polymer matrix were synthesized embedding different metal salts of transition elements like copper, cobalt, nickel, iron, cadmium, and zinc by a biomimetic route. The metal salts present in composites were reduced in situ to metallic…
We report the preparation of degradable capsules via layer-by-layer assembly using polyelectrolyte (PE) polyrotaxanes (PRXs). The PRX capsules were prepared by the sequential deposition of PRXs onto silica particles followed by the dissolution of the silica cores. The colloidal stability of the PRX capsules that are f…
Cryoprotection is the final step before flash-cooling, during which crystals can be improved or damaged and data quality maximized. A well thought-out cryoprotection requires optimized composition of suitable components and an appropriate soak period. Crystallization methodology has been extensively studied, but not c…
In this study, polyaniline (PANI)/graphene nanosheet (GNS) composites were synthesized through chemical oxidation polymerization by changing the weight ratio of aniline monomers. To examine the morphological structure of the composites, scanning electron microscopy and transmission electron microscopy (TEM) were condu…
The scale inhibitor was prepared based on itaconic acid (IA), styrene p-sulfonic sodium (SSS), maleic anhydride (MA), and acrylamide (AM) as monomers, and ammonium persulfate as an initiator by the free-radical polymerization. The structure of the polymer was characterized by FT-IR and UV-Vis spectroscopy. Using the s…
The cationic, all-conjugated AB diblock copolymer poly[9,9-bis(2-ethylhexyl)fluorene]-b-poly[3-(6-trimethylammoniumhexyl) thiophene] bromide (PF2/6-b-P3TMAHT) shows dual fluorescence from the poly(fluorene) (PF) and poly(thiophene) (PT) blocks. A comparison of fluorescence quenching of the cationic PT block fluorescen…
Novel polyurea–urethane (PUU) supramolecular polymer networks based on triuret and tetrauret blocks were synthesized. The network formation was controlled through the conformation of hydrogen bonding moieties and their concentration. FTIR spectroscopy and solubility tests showed the presence of significant hydrogen bo…
We report the preparation of different surface patterns based on the photo-cross-linking/degradation kinetics of polystyrene (PS) by using UV light. Upon exposure to UV light, PS can be initially cross-linked, whereas an excess of the exposure time or intensity provokes the degradation of the material. Typically photo…
Using AC impedance spectroscopy as a means of in situ thermometry, temperature runaway over 1,500°C within a few seconds was observed for the first time in dense 92 mol% ZrO 2 –8 mol% Y 2 O 3 (8 YSZ ) ceramics heated under a constant voltage. Such runaway is especially pronounced when starting from a low background te…
High performance light absorber with a broad bandwidth is particularly desirable for near-infrared photodetection and optical interconnects. Here we demonstrate a dual broadband perfect absorber in the near-infrared regime, which is based on a hybrid plasmonic-photonic microstructure. Such a microstructure is fabricat…
Spectroscopically resolved emission from single nanocrystals at cryogenic temperatures provides unique insight into physical processes that occur within these materials. At low temperatures, the emission spectra collapse to narrow lines, revealing a rich spectroscopic landscape and unexpected properties, completely hi…
The effect of sonication temperature on the debundling of carbon nanotube (CNT) macro-bundles is reported and demonstrated by analysis with different particle sizing methods. The change of bundle size over time and after several comparatively gentle sonication cycles of suspensions at various temperatures is reported.…
Abstract Dimeric methylzinc ketoiminate complexes bis{4‐[(2,6‐diisopropylphenyl)imido]pentan‐1‐one}methylzinc, [{L 1 }ZnMe] 2 , and bis{1‐phenyl‐3[(2,6‐diisopropylphenyl)imido]butan‐1‐one}methylzinc, [{L 2 }ZnMe] 2 have been synthesized and completely characterized along with the homoleptic zinc complex bis{1‐phenyl‐3…
In semiconductor photovoltaics, photoconversion efficiency is governed by a simple competition: the incident photon energy is either transferred to the crystal lattice (heat) or transferred to electrons. In conventional materials, energy loss to the lattice is more efficient than energy transferred to electrons, thus…
It is a great challenge to directly assemble two-dimensional (2D) graphene oxide (GO) sheets into 1D fibers without any polymer or surfactant for their promising multifunctional applications. Herein, a facile self-assembly strategy is proposed to fabricate neat GO fibers from cost-efficient, aqueous GO suspension at a…
Polypyrrole (PPy)/poly(pyrrole-co-acrylamide) (Poly(Py-co-AAm)/nanocomposite was prepared by a simple and inexpensive in-situ co-polymerization of pyrrole and acrylamide in the presence of Fe3O4 nanoparticles. The nanocomposites were characterized by FTIR, SEM, XRD, TGA, and conductivity measurements. The FTIR spectra…
A new class of polyphospholes bearing alkanesulfonylimino moieties on the phosphorus(V) centers was prepared by the Pd-CuI-promoted Stille coupling reaction to investigate the charge-carrier transport properties of the π-networks of polyphospholes. Time-of-flight measurements have revealed that the poly(phosphole P-im…
Maleated cyclodexdrin (MC) and its metal salts (Metal MC) were synthesized and added into poly(vinyl alcohol)–intumescent flame retardant (PVA–IFR) composites as synergists. Results of thermogravimetric analysis (TGA) and differential thermal analysis (DTG) showed that the thermal stability of the composites was great…