Materials Literature
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The noncovalent self-assembly of chromophores in an organoclay template results in the formation of fluorescent hybrid hydrogels and films. These clay–dye hybrids act as novel supramolecular scaffolds for light-harvesting as the aminoclay (AC) templates the spatial organization of donor and acceptor molecules to promo…
A series of novel highly water-soluble neutral BODIPY dyes have been obtained by functionalization of BODIPY dyes with branched oligo(ethylene glycol)methyl ether groups at positions 8, 2 and 6 or 4 and 4'. Use of an ortho-substituent group of branched oligo(ethylene glycol)methyl ether on the meso-phenyl ring of BODI…
The behavior and toxicity of silver engineered nanoparticles (Ag-ENs) to the mixotrophic freshwater alga Ochromonas danica were examined in the present study to determine whether any other mechanisms are involved in their algal toxicity besides Ag(+) liberation outside the cells. Despite their good dispersability, the…
Cleaning up their act: A novel CO2-stable and cobalt-free dual-phase membrane for oxygen separation from air has been developed that consists of 40 wt % NiFe2O4 and 60 wt % Ce0.9Gd0.1O2−δ. This membrane shows a steady oxygen permeation flux over 100 h using CO2 as sweep gas at 1000 °C.
The dielectric, ferroelectric, and electric field-induced strain response of (1- x )(Na 0.5 Bi 0.5 )TiO 3 - x BaTiO 3 (NBT-BT) (0.04 ≤ x ≤ 0.10) ceramics has been systematically investigated as a function of temperature. It is found that ferroelectric and antiferroelectric (AFE)-like behavior can coexist at temperatur…
We report herein the synthesis of a new hybrid material, PdNPs@CNCs consisting of monodisperse Pd nanoparticles (PdNPs) evenly deposited onto colloidal cellulose nanocrystallites (CNCs). This material proved an active catalyst for the hydrogenation reaction of phenol to cyclohexanone in water as a solvent, at room tem…
Three nano-porous NiO samples with high specific surface area were prepared by a simple hydrothermal method under homogeneous precipitation conditions using CTAB as a template and urea as the hydrolysis controlling agent. This study was done to determine the effect of different anions (acetate, nitrate and chloride) p…
Two versatile strategies for preparing metal–organic conjugated microporous polymers (MO-CMPs) containing metals such as rhenium, rhodium, and iridium are described (see example). These materials combine the uninterrupted extended electronic conjugation in the network with catalytically active metal sites.
It has long been recognized that the physical form of materials can mediate their toxicity--the health impacts of asbestiform materials, industrial aerosols, and ambient particulate matter are prime examples. Yet over the past 20 years, toxicology research has suggested complex and previously unrecognized associations…
We have studied the crystallization behavior of colloidal cubes by means of tunable depletion interactions. The colloidal system consists of novel micron-sized cubic particles prepared by silica deposition on hematite templates and various non-adsorbing water-soluble polymers as depletion agents. We have found that un…
The temperature dependence of the mobility in suspended graphene samples is investigated. In clean samples, flexural phonons become the leading scattering mechanism at temperature $T\ensuremath{\gtrsim}10\text{ }\text{ }\mathrm{K}$, and the resistivity increases quadratically with $T$. Flexural phonons limit the intri…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTLow Symmetry Phthalocyanines and Their AnaloguesJohn Mack and Nagao Kobayashi*View Author Information Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan* Telephone and Fax: +81-22-795-7719. E-mail: [email protected]Cite this: Chem.…
High quality cellulose nanocrystals are synthesized using a simple one-step procedure with ammonium persulfate. This versatile method processes a variety of cellulosic biomass without the need for pretreatments to remove non- cellulosic plant contents.
Graphene oxide (GO) was successfully prepared by a modified Hummer's method. The reduction effect and mechanism of the as-prepared GO reduced with hydrazine hydrate at different temperatures and time were characterized by x-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), elemental…
The ability to engineer surface properties of nanocrystals (NCs) is important for various applications, as many of the physical and chemical properties of nanoscale materials are strongly affected by the surface chemistry. Here, we report a facile ligand-exchange approach, which enables sequential surface functionaliz…
Abstract Oxidation into CO 2 is a major solution to CO abatement in air depollution treatments. The development of catalytic converters led to an extraordinary high number of publications on metal catalysts during the last fifty years. Due to the increasing price of noble metals and to remarkable progresses in oxide s…
Indium gallium zinc oxide (IGZO) films were deposited on glass substrates by co-sputtering and targets. The structural, electrical, and optical properties of the IGZO films are investigated as functions of substrate temperature and radio frequency (rf) power supplied to the target . The X-ray diffraction patterns show…
A commercial titania nanopowder was surface modified by grafting with polydimethylsiloxane (PDMS) polymers with a molecular weight of 5000, and characterized for particle dispersion and rheology in a silicone oil fluid medium. Methods employed include TEM, TGA, dynamic light scattering, and steady shear and dynamic rh…
In this work, we have tested various formulations in order to get emulsions containing pure water, Tunisian olive oil, Tunisian clays, and an ammonium salt. Two different types of clays: smectite and kaolinite and the cethyltrimethylamonium bromide (CTAB) were tested. CTAB is used as surfactant and a compound modifyin…
We use numerical simulations to understand how random deviations from the ideal spherical shape affect the ability of hard particles to form fcc crystalline structures. Using a system of hard spheres as a reference, we determine the fluid-solid coexistence pressures of both shape-polydisperse and monodisperse systems…