Materials Literature
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Ferumoxtran-10 is an ultrasmall superparamagnetic biodegradable iron oxide which serves as a MRI contrast agent in the differentiation of metastatic and non-metastatic lymph nodes in primary malignancies and imaging of phagocyte-associated disease processes. Ferumoxtran-10 is supplied as a lyophilized powder containin…
Although the exchange coupling and local crystal-field environment are almost identical in the two-dimensional (2D) and three-dimensional (3D) series of bimetallic oxalates, those two classes of materials exhibit quite different magnetic properties. Using mean-field theory to treat the exchange interaction, we evaluat…
Submicrocrystalline structure of W obtained by severe plastic deformation (SPD) by high pressure torsion (5 revolutions of anvils at 4000C) and its thermal stability have been examined by TEM. Grain boundaries of submicrocrystalline W have been studied by the method of the emission Mössbauer spectroscopy in the initia…
Growth of an Ag film on a ZnO (0 0 0 1) surface by ultra-high vacuum deposition has been investigated by field emission scanning electron microscopy. It is revealed that the growth temperature has a considerable effect on the formation of a continuous Ag thin film on a ZnO surface. At room temperature or above, the fo…
A novel approach is used to synthesize graphite oxide (GO) coated with polyaniline (PANI) by in-situ emulsion polymerization. The dispersion behavior of exfoliated graphite oxide in aqueous solution under ultrasonic vibration is investigated by atomic force microscopy (AFM). Strong interactions owing to hydrogen bonds…
Abstract Polypropylene + low density polyethylene (PP + LDPE) blends involving 0, 25, 50, 75 and 100 wt% of PP with dialkyl peroxide (DAP) were prepared by melt blending in a single‐screw extruder. The effects of adding dialkyl peroxide on mechanical and thermal properties of PP + LDPE blends have been studied. It was…
Polymeric microcapsules containing reactive sites on the shell surface and two orthogonally reactive polymers encapsulated within the interior are selectively labeled. The capsules provide three spatially separate and differentially reactive sites. Confocal fluorescence microscopy is used to characterize the distribut…
Viscosities and densities of poly(vinyl chloride) + tetrahydrofuran (PVC/THF) mixtures were measured at several temperatures between (283.15 and 303.15) K. The measured densities were satisfactorily correlated by a simple first-order polynomial with respect to PVC concentration. The average molecular weight of PVC is…
Honeycomb structures with controllable size are of great interest for many potential applications such as containers for microencapsulating and controlled delivery, gas sensors, catalysis and photonic crystals and devices. A ZnO honeycomb structure was successfully fabricated on metal prepatterned Si substrates by the…
The transport and magnetotransport properties of a newly fabricated tunnel structure manganite/depletion layer/manganese silicide have been studied in the current-in-plane (CIP) geometry. A manganite depletion layer in the structure forms a potential barrier sandwiched between two conducting layers, one of manganite a…
Microstructure influence on hydrogen trapping in a Cr-Mo type steels −2.25Cr 1Mo and 2.25Cr 1Mo 0.25V− was studied by means of electrochemical permeation test, thermal desorption spectrometry, scanning and transmission electron microscopy analysis. Both steels, used in hydrogenation reactors, in as received and artifi…
Poly(vinyl chloride) (PVC)/acrylonitrile-butadiene rubber (NBR) blends can be obtained through a dynamic vulcanization process as a melt-processible thermoplastic elastomer which produces parts that look, feel and perform like vulcanized rubber with the advantage of being processible as a thermoplastic material. In th…
The solubilities of lauric acid in n -hexane, acetone, 2-propanol, propanol, 1-bromopropane, and trichloroethylene have been measured using a dynamic equilibrium method from (279.0 to 315.3) K. All systems present positive deviations of the ideal behavior. The solvent that presented the lowest average deviation, conce…
The crystallization kinetics of poly(ethylene terephthalate)/attapulgite (AT) nanocomposites and their melting behaviors after isothermal crystallization from the melt were investigated by DSC and analyzed using the Avrami method. The isothermal crystallization kinetics showed that the addition of AT increased both th…
Zhihua Zhoua, Qingfeng Yia, Lihua Liua, Xiaoping Liua & Qingquan Liua a College of Chemistry and Chemical Engineering , Hunan University of Science and Technology , Xiangtan, P. R. China A bulk degradation of poly-L-lactide (PLLA) rectangular bars was studied by incubating them in phosphate-buffered solution at 37°C f…
Recent developments in producing large single crystal CVD diamond plates are reviewed. The developments consist of synthesis of large single crystal diamond and production of single crystal diamond plates from the bulk diamond by the lift-off process. Combining these developments, half-inch single crystal CVD diamond…
Amorphous InGaZnO4 (a-IGZO) films doped with various concentrations of Mn have been fabricated by using pulsed-laser deposition technique. Optical, electrical, and magnetic properties of the prepared Mn-doped a-IGZO films were investigated. The resistivity, carrier concentration, and carrier mobility of the a-IGZO fil…
We fabricated 20 nm thick PbTiO3 films via reactive magnetron sputtering and studied the domain switching phenomena and retention properties using piezoresponse force microscopy. We found that multistep deposited PbTiO3 thin films showed 29% smaller rms roughness (2.5 versus 3.5 nm), 28% smaller coercive voltage (1.68…
Polypropylene (PP)/ethylene-octene copolymer (POE) blends with 10–50wt% POE composition were prepared using a twin-screw extruder in the melt state. Mechanical properties of PP and PP/POE blends were tested and the effect of POE content on the crystalline morphology and structure, melting and crystallization behavior,…
Abstract Distribution of fabric softeners on cotton terry cloth was studied using scanning electron microscopy and energy dispersive X‐ray analysis. The unsaturated groups in the quaternary fabric softeners were tagged with osmium tetroxide to provide contrast in the microscopy. Longitudinal specimens showed the fabri…