Materials Literature
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Chitosan fluorescent films containing 7-hydroxy-4-methylcoumarin (7H4MC) have been successfully prepared. Used chitosan was obtained from chitin isolated from skin of tiger prawns (Penaeus monodon) through the deproteination, demineralization, and deacetylation process. The yields of chitin and chitosan are 10.66% and…
New mixed-valence trinuclear iron pentafluorobenzoate complexes were synthesized. Their valence-detrapping and/or valence-trapping phenomena were studied by (57)Fe Mössbauer spectroscopy and X-ray crystallography. For [Fe3O(C6F5CO2)6(py)3]·CH2Cl2 (1), a valence-trapped state was observed at low temperatures, while the…
Wood Plastic Composite (WPC) has attracted great interest in outdoor building products for the reduced cost and the possibility of using recycled materials. Nevertheless the material shows two problems: the large viscosity due to the presence of high concentrations of filler and the degradation of cellulose during pro…
The ac and dc conductivity in barium-vanadate glasses was investigated as a function of temperature and frequency with the use of impedance spectroscopy. The topography and microstructure of glasses were investigated by the means of X-ray diffraction (XRD) and scanning electron microscopy (SEM) methods. The XRD result…
The sintering of different ZnO nanostructures by the thermal decomposition of zinc acetate is reported. Morphological changes from nanorods to nanoparticles are exhibited with the increase of the decomposition temperature from 300 to 500°C. The material showed a loss in the crystalline order with the increase in the t…
Sa disponibilité et son faible coût ont fait de la terre dans la plupart des régions du globe, un des matériaux de construction les plus répondus et plus anciens. La terre présente un intérêt écologique évidant, où sa construction participe bien à la protection de l’environnement à l’industrie chimique (fabrication de…
Strain-induced corrosion cracking in low alloyed steels has been extensively investigated during the last decades. One finding from recent investigations is that small amounts of chlorides tend to increase the cracking susceptibility of such materials. The present paper investigates the effect of chloride addition on…
Laminated Ti/Al2O3 composite was fabricated by tape casting with close control of thickness (about 200 µm) of Al2O3 and titanium layers. The green tapes of titanium and Al2O3 were prepared at room temperature due to high flexibility and strength. In order to improve the density of green layers, the binder removal temp…
Fibers obtained from de sugarcane bagasse are being investigated as possible engineering materials. Their application as reinforcement of polymer composites is of interest due not only to environmental benefits associated with a waste recycling but also to their biodegradable and renewable characterisitics. Since it i…
Four amphiphilic peptides with designed hairpin structure were synthesized and their monolayers were employed as model systems to study biologically inspired calcium carbonate crystallization. Langmuir monolayers of hairpin peptides were investigated by surface pressure area isotherms, surface potential isotherms, Bre…
The CPU (Compression and Purification Unit) is used to capture, purify and compress the CO 2 contained in oxy-combustion boiler flue gas. Therefore, it plays a key role in the oxy-combustion route for carbon capture and storage (CCS). Over the last ten years Air Liquide has been developing this technology from a conce…
We present the study based on extended Maxwell-Garnett effective medium theory for the effective dielectric function of the diamond like carbon film with embedded silver nanoparticles (DLC-Ag) and rigorous coupled-wave analysis to evaluate resonance characteristics in a visible range of periodic 1-D grating structure…
Silver/titanium dioxide composite nanoparticles imbedded in polyacrylonitrile (PAN) nanofibers and converted into carbon nanofibers by stabilization and calcination was obtained and tested for capacitive deionization technology. First, the silver ions were converted to metallic silver nanoparticles, through reduction…
High toughness and light transmittance PMMA composite was prepared via in-situ thermal polymerization with gel networks self-assembling from dendritic gelators. Significant improvements of PMMA composite's toughness could be achieved by adding a small amount of dendrimers, without losing its light transmittance. Phase…
The structural and electrical properties of mesoporous La0.7Sr0.3MnO3 (LSMO) films for electrode applications were investigated as a function of annealing temperature. Mesoporous LSMO films were successfully synthesized by using sol–gel and evaporation-induced self-assembly processes. Metal acetates and Brij-S10 were…
The synthesis and characterization of pyridine bent-core liquid crystals are reported. Some compounds exhibit B1 and B7 mesophases. Lower and wider mesophase ranges are obtained by decreasing the polarity of linkers between the pyridine ring and the inner aromatic rings, and increasing the length of terminal chains.
Laser Spinning is a new technique to produce ultralongnanofibers with tailored chemical compositions. In this method, a high power laser is employed to melt a small volume of the precursor material at high temperatures. At the same time, a supersonic gas jet is injected on this molten volume producing its rapid coolin…
The structural, magnetic and electrical properties of the mixed Ti-Mn oxides Sr(1-x)La(x)Ti(0.5)Mn(0.5)O3 (0 ≤ x ≤ 0.5) are reported. At room temperature the oxides have a cubic structure in space group Pm3m for x ≤ 0.25 and rhombohedral in R3c for 0.3 ≤ x ≤ 0.50. X-ray absorption spectroscopic measurements demonstrat…
Heat treatment of barium iron vanadate glass, BaO‐Fe2O3‐V2O5, at temperatures higher than crystallization temperature causes a marked decrease in resistivity (ρ) from several MΩcm to several Ωcm. 57Fe Mössbauer spectrum of heat-treated vanadate glass shows a marked decrease in quadrupole splitting (Δ) of FeIII, reflec…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Radhakrishnan Srinivasan, Satish Bolloju; Optical properties of undoped and Mg doped CuCrO2 powde…