Materials Literature
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This toxicological assessment evaluated the safety of a hydroethanolic extract prepared from Caralluma fimbriata (CFE), a dietary supplement marketed worldwide as an appetite suppressant. Studies included 2 in vitro genotoxicity assays, a repeated dose oral toxicity study, and a developmental study in rats. No evidenc…
Abstract The kinetics of 3-hexylthiophene polymerization by FeCl3 was investigated. There was observed a simple and rapid rise to a maximum polymerization rate (Rp) followed by a moderate decay to a stationary Rp. The polymerization activity increased monotonically with increasing reaction temperature to correspond to…
Polyferrocenylsilanes (PFSs) [Fe(μ-C 5 H 4 ) 2 SiRR′] n are generally atactic and amorphous when unsymmetrically substituted at silicon (R ≠ R′) but are often able to crystallize if the substitution is symmetrical (R = R′). In this paper we report detailed studies of the ring-opening polymerization (ROP) of [1]methyls…
We present further modifications to aberration-corrected environmental transmission electron microscopy (AC-ETEM) for the dynamic HRTEM observation of single atoms. Additional pumping levels that include three additional turbomolecular pumps (TMPs) enable a base pressure of 3.5 × 10(-5) Pa in the sample chamber. The e…
We report on electronic, thermoelectric, and magneto-dielectric properties of Ca1−xNaxCr2O4 series with a calcium ferrite-type structure prepared by high-pressure-high-temperature synthesis. Dielectric spectroscopy down to 2 K confirms that both CaCr2O4 and NaCr2O4 end members have an insulating ground state notwithst…
In recent years, progress in the field of hybrid materials has been accelerated through use of the sol–gel process for creating materials and devices, which benefit from the incorporation of both inorganic and organic components. In this work, organic–inorganic hybrid membranes were prepared from tetraethoxysilane and…
Abstract An improved strategy to synthesize SiO 2 ‐PMMA nanoparticles with tunable shell thickness is demonstrated, via iron (III) catalyst‐mediated activators generated by electron transfer for atom transfer radical polymerization (AGET ATRP). To investigate the effect of the content monomer and ligand on the PMMA sh…
We have investigated the changes in the band structure and core-level energy of Ca(Fe1-xRhx)2As2 across the tetragonal–collapsed tetragonal (T–cT) phase transition using photoemission spectroscopy. Angle-resolved photoemission spectroscopy clearly demonstrates that, at the Γ point in the Brillouin zone, a hole-like ba…
Abstract 1,3-Bis[4-(dimethylamino)phenyl]isobenzofuran (1a) and a derivative were efficiently prepared through a sequence of reactions in a single batch reactor (time integration). The o-quinodimethane-type π-conjugation in 1a was confirmed by bond alternation determined by a low-temperature X-ray analysis. Brightly c…
The structural stability and electronic properties of (ZnO)n, (NiO)n, (ZnO)n/(NiO)n for n = (1 to 4) and 3D structures were studied using density functional theory. The geometrical optimisation of clusters implies that when the atoms in the cluster increase it leads to an increase in its stability. The stability drast…
Emulsion templating of high internal phase emulsion was used to synthesize high oil-absorption resins with hexadecyl methacrylate and methyl methacrylate as monomers. Effects of cross-linking agent, emulsifier, initiator and porogen, polymerization temperature, polymerization time, the water/oil volume ratio, and the…
To identify optimal deposition conditions and morphologies for ZnO nanorod arrays (NRA) for photovoltaic applications, ZnO NRA were electrochemically grown onto transparent conducting oxide (TCO) substrates pre-covered with an intrinsic zinc oxide (i-ZnO) seed layer (SL) at different cathodic potentials, deposition ti…
The use of high-performance perovskite-structure epitaxial relaxor ferroelectric films [S. H. Baek et al., Science 334, 958 (2011)] is hindered by the lack of knowledge of epitaxial effects therein. It is experimentally shown here that a biaxial epitaxial compression can favor the relaxor state over ferroelectricity.…
Large-area, atomically thin hexagonal boron nitride (h-BN) thin films were grown simply by annealing in a vacuum from solid sources deposited on Ni or Co foils. Either a sputter-deposited amorphous boron nitride film or a spin-coated borane ammonia film can be used as the B and N source. The h-BN films were formed on…
Two new species of Orthoseira from lava tubes on Île Amsterdam and Big Island (Hawai΄i) are described using light and scanning electron microscopy: Orthoseira johansenii Lowe & Kociolek sp. nov., from Hawai’i, and O. verleyenii Van de Vijver sp. nov., from the subantarctic. Both species have flat valve surfaces, t…
Abstract In this article, we report on carbonaceous impurities that residing in graphene oxide prepared from the chemical exfoliation of graphite significantly impact on the electrochemical capacitive qualities of graphene oxide and in situ electrochemically reduced graphene oxide as well. The results demonstrate that…
Benefiting from excitonic charge-transfer states, an efficient non-linear optical response is observed in type-II nanocrystals by four-wave mixing when the incident photon energy lies below the bandgaps of constituent semiconductors. The non-linear optical properties in nanocrystals can be manipulated by the band alig…
Abstract A simple, versatile, rapid, and inexpensive procedure based on the immersion method is developed to fabricate chemical gradients on chemically activated Si/SiO 2 surfaces by a trichloro (1H,1H,2H,2H‐perfluorooctyl) silane self‐assembly monolayer (SAM). Contact angle measurements, atomic force microscopy, and…
In this work, we investigated the effect of topological structures of block copolymers on the formation of the nanophase in epoxy thermosets containing amphiphilic block copolymers. Two block copolymers composed of poly(ε-caprolactone) (PCL) and poly(2,2,2-trifluoroethyl acrylate) (PTFEA) blocks were synthesized to po…
ABSTRACT To obtain homogeneous dispersion and good interfacial interaction between MWCNT and polymer matrix, the functionalization of MWCNTs with 3,5‐diaminobenzoic acid (DAB) via a direct Friedel‐Crafts acylation was accomplished. FTIR, XPS, and FT‐Raman analysis was performed to confirm that diaminobenzoyl moieties…