Materials Literature
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We report the use of novel multicolored CdTe quantum dots (QDs) as fluorophores for biological fluorescence imaging. The CdTe QDs were prepared to exhibit emission wavelengths in the green, yellow, and red range by using trifluoroacetic acid (TFA), L-cysteine and thioglycolic acid (TGA) as surface stabilizers, respect…
Abstract Continuous ultrasonic devulcanization of carbon black (CB) filled isoprene rubber (IR) was carried out. Similar to unfilled IR, power consumption during the devulcanization of the filled IR increased with the increase of ultrasonic amplitude indicating a greater extent of devulcanization. This was in contrast…
Rayleigh interferometry has been extensively used for the precise determination of diffusion coefficients for binary and ternary liquid mixtures. For ternary mixtures, the 2x2 matrix of multicomponent diffusion coefficients is obtained. Polydispersity adds complexity to the meaning of these measured diffusion coeffici…
Nanosized, purified crystalline-phase cerium-doped lutetium aluminum garnet (LuAG:Ce) phosphors were prepared by the urea homogeneous precipitation method. The obtained phosphors showed much higher dispersivity, a fairly uniform size of about 30 nm, and higher luminescence intensity than those synthesized by a sol–gel…
The results of the studies of structural transformations in liquid crystal layers with homeotropic and planar macrostructures in the fields of longitudinal, surface, and shear ultrasonic waves are systematized and generalized.
Polyimide thin films were produced by spin-coating a fluoride polyimide on glass substrates, followed by a mechanical rubbing. The application of mechanical rubbing to the polyimide thin films breaks the symmetry on the polymer surface and promotes the formation of a template for liquid crystal alignment. The surface…
We report the formation of negatively charged helium ions upon scattering of neutral helium atoms from silicon wafers coated with diamondlike carbon (DLC). The energy of the primary He atoms ranges from 10–1500eV. The negative ion fraction in the scattered He beam ranges from 7×10−5 down to 10−5 with increasing energy…
Polymer derived SiOC microcellular foams were etched by means of a 20 vol.-%HF solution. An increase in one order of magnitude in specific surface area (SSA) values compared to the unetched samples was observed. This SSA increase was accompanied by micro- and mesopores formation. The limited increase in the specific s…
In the present contribution, ultrafine fibers were spun from poly(vinyl alcohol) (PVA)/water solution using a homemade electrospinning set-up. The effects of the concentration of polymer solution, spinning voltage, collection distance between the tip to target and the flow rate of the solution on the morphological app…
Carbon-encapsulated, cobalt-doped ZnO nanocrystals were synthesized by the one-step RAPET technique with Co:Zn atomic ratios of 0, 0.011, 0.037, 0.082, and 0.183. The substitution of Zn 2+ by Co 2+ decreased the XRD peak intensities of the Co 2+ -occupied lattice planes due to the lower atomic scattering factor of Co…
Stability of sodium borohydride in the form of concentrated solutions and suspensions and solids corresponding to a crystal hydrate in composition was studied. The effects of temperature, concentrations of sodium borohydride and alkali, and nature of alkali metal cation on the rate of sodium borohydride hydrolysis wer…
Gd(3)L is a trinuclear Gd(3+) complex of intermediate size, designed for contrast agent applications in high field magnetic resonance imaging (H(12)L is based on a trimethylbenzene core bearing three methylene-diethylenetriamine- N,N,N'',N''-tetraacetate moieties). Thanks to its appropriate size, the presence of two i…
Biological corrosion of ADO quality aluminum and aluminum-based construction materials (alloys V65, D16, and D16T) was studied. Thirteen microscopic fungus species and six bacterial species proved to be able to attack aluminum and its alloys. It was found that biocorrosion of metals by microscopic fungi and bacteria w…
Here we report the preparation of porous CeO2 and clusters of CeO2 nanosheet arrays via a simple, efficient electrochemical approach. Gas bubbles functioning as a dynamic template were utilized in our research for the synthesis of nanosheet array clusters. The Hc and Mr values of porous CeO2 are almost the same as tho…
The effect of the parameters of mechanochemical activation of magnesium hydride and MgH 2 -graphite binary compositions on the parameters of materials and their hydrolytic activity has been studied. It is concluded that mechanochemical treatment increases the reactivity of magnesium hydride in its reaction with water.…
The reflectance of a graphene monolayer, as well as of a system of monolayers, is calculated in the infrared range. A quantum expression for the conductivity in the collisionless regime that depends on the frequency, the temperature, and the concentration of carriers is used in the calculations. Above the threshold of…
Eggshell membrane (ESM) has potential as a natural scaffold because of its highly porous structure and good biocompatibility. To mimic its structure and surface properties, soluble eggshell membrane protein (SEP) was extracted from ESM and electrospun with a biodegradable polymer, poly(epsilon-caprolactone) (PCL). SEP…
The replacement of chromate corrosion inhibitors will require synergistic combinations of materials that can only be identified and characterized through experimentation at the present time. One approach to accelerate the discovery and characterization of materials is through the use of high-throughput screening (HTS)…
A series of azopyridine‐containing hydrogen bonding acceptors (4a–c) with flexible spacers of oligo(methylene) were synthesised. Hydrogen‐bonded polymeric complexes 4/5 and trimeric complexes 4/62 , where 5 and 6 are aromatic dicarboxylic acids and monocarboxylic acids, respectively, were prepared and their liquid cry…
Mechanical activation of a mixture of magnesium hydroxide, aluminum hydroxide, and sodium bicarbonate in an AGO-2 planetary mill, followed by water washing leads to the formation of a layered magnesium aluminum hydroxide. The double hydroxide obtained at a magnesium hydroxide to aluminum hydroxide ratio of 3:1 is esse…