Materials Literature
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The dynamics of decay of the photoproducts of the two non equivalent molecules of N-(n-propyl) nitrospiropyrane in the crystalline state is significantly different due to the effect of the specific site where each of the molecules is located in the crystal latice.
The photophysical properties of Ti(2+)-doped NaCl and MgCl(2) at 15 K are compared. At this temperature both materials emit luminescence from their respective lowest excited states and from the (3)T(1g)(t(2g)e(g)) higher excited state. In Ti(2+):MgCl(2) the ligand field is significantly stronger than in Ti(2+):NaCl, l…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
Abstract In this research, the preparation and characterization of polypropylene (PP) and natural zeolite composites were studied. Natural zeolite mined in Gördes, Turkey was used as an alternative filler to CaCO 3 . Films were prepared by the extrusion of PP, and surface‐modified zeolite was made by polyethylene glyc…
The use of a bis-bidentate ligand in a solid cobalt dioxolene complex affords the necessary cooperative properties that lead to thermal hysteresis in a valence tautomeric interconversion equilibrium.
[structure: see text]. New poly(phenylene ethynylene)s (PPEs) and poly(phenylene vinylene)s (PPVs) that are highly emissive in solution and thin films were prepared utilizing palladium-catalyzed cross-coupling between new 1,4-diiodo-2,3-dialkoxybenzene- and iptycene-containing monomers. The absorption and emission spe…
Using an ab initio local density approximation (LDA) method, we have studied the structural properties and the electronic band structures of several tin-based clathrate materials. We find that the pure type-I $({\mathrm{Sn}}_{46})$ and type-II $({\mathrm{Sn}}_{136})$ clathrate frameworks are metastable, expanded-volum…
The study objectives were to quantify the time- and magnitude-dependence of flow-induced alignment in vascular smooth muscle cells (SMC) and to identify pathways related to the orientation process. Using an intensity gradient method, we demonstrated that SMC aligned in the direction perpendicular to applied shear stre…
Several types of sugar-installed poly(ethylene glycol)/poly(DL-lactide) (sugar-PEG/PLA) block copolymers were synthesized. The synthesized block copolymer forms a core-shell type polymeric micelle in aqueous media possessing sugar molecules on its surface. Specific recognition of lectin proteins with the sugar molecul…
We report on the fabrication of field emission microcathodes which use carbon nanotubes as the field emission source. The devices incorporated an integrated gate electrode in order to achieve truly low-voltage field emission. A single-mask, self-aligned technique was used to pattern the gate, insulator and catalyst fo…
A quantum statistical theory of spin-dependent tunneling through asymmetric magnetic double barrier junctions is presented which describes $both$ ballistic and diffuse tunneling by a single analytical expression. It is evidenced that the key parameter for the transition between these two tunneling regimes is the elect…
We show through a variational calculation that in a large range of parameters the paramagnetic to ferromagnetic transition in colossal magnetoresistance compounds is accompanied by a collapse of polaronic lattice disorder in addition to that of spin disorder. The spin-lattice disordered state is shown to be localized…
In this comment, we give a simple analytical proof for the even-odd behavior of the conductance of atomic wires.
Ce travail experimental vise a mesurer l'impact du mouvement relatif solide / liquide sur la croissance de grains equiaxes en chute libre. Pour cela, nous avons developpe un dispositif rendant possible le suivi tridimensionnel et in situ de cristaux equiaxes sedimentant dans un liquide surfondu. Les experiences ont et…
In this work, the hazardous properties of solvent base adhesive wastes generated in the footwear manufacturing process have been studied. The characterisation procedures and criteria used are those contained in the legal documents European Union Council Decision 94/904/CE and October 13th Spanish Ministerial Order. Th…
When a surface of a silicon wafer, on which a nanometer-thin SiO 2 layer is selectively formed, is observed by a scanning electron microscope (SEM), the brightness of the SEM image at the SiO 2 portion is stronger than that of the bare Si portion, and the brightness increases with the increasing thickness of the SiO 2…
Four thermoplastic elastomers having the structure of poly(ether-ester-imide)s, PEEIs, were prepared and characterized. The hard segments were synthesized from 1,4-dihydroxybutane and from an imide dicarboxylic acid based on 1,6-diaminohexane and trimellitic anhydride. Poly(tetramethylene oxide)-1000, poly(ethylene ox…
<abstract language="eng">The compounds 5-nitro-8-quinolinol and 5,7-dinitro-8-quinolinol were obtained by nitration of the chelant 8-quinolinol. The compounds were characterized through EA, MNR, XRD, IR, TG, DTA and DSC. It was verified through thermal analysis that the compounds show consecutive processes of sublimat…
Reducing-atmosphere treatment at 400°C for 10 min was performed on sol–gel-derived Pb(Zr,Ti)O 3 (PZT) thin films, which were spin-coated on a LaNiO 3 /Pt/Ti/SiO 2 /Si substrate and annealed. The reducing atmosphere does not produce any significant change of the preferred orientation perovskite structure of these ferro…
Heteropoly acid entraped in nano silica matrix was prepared by the microemulsions method. The primary particle size was less than 400nm and it decreased with the content of the heteropoly acid. When these silica particles were blended with sulfonated polyethersulfone, the HPA could be effectively immobilized in aqueou…