Materials Literature
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Fibers of highly oriented Si nanowires (SiNWs) were formed by drawing from a condensed SiNW suspension. The SiNW fiber, excited at 514.5nm, produces a strong photoluminescence (PL) at room temperature. The PL spectrum shows three bands at 565–580, 605–640, and 680–690nm, respectively, which are consistent with the PL…
The growth kinetics of one-dimensional single-crystalline KNbO(3) nanostructures (nanowires and nanofingers, the latter understood as defective nanowires) prepared by hydrothermal processing routes has been theoretically studied. A model taking into account the cube-based morphology of the nanostructures, their defect…
Dramatic relaxation enhancements of L-lactate resonances have been observed upon formation of ternary adducts with Gd(III) complexes of heptadentate DO3A and DO3A-like ligands (DO3A = 1,4,7,10-tetraazaciclododecane-1,4,7-triacetic acid). Detailed 1H and 17O NMR relaxometry investigations allow us to obtain structural,…
Abstract The zero‐dimensional polymer [Pb 6 (μ 2 OOCCH=CHFc) 2 (μ 3 ‐OOCCH=CHFc) 2 (μ 2 ‐η 2 ‐OOCCH=CHFc) 2 (η 2 ‐OOCCH=CHFc) 2 (μ 4 ‐O) 2 ] ( 1 ), the one‐dimensional chain polymers [Pb(η 1 ‐μ 2 ‐OOCCH=CHFc) 2 (phen)] n (phen = phenanthroline; ( 2 ), {[Cd(μ 2 ‐η 2 ‐OOCCH=CHFc)(η 2 ‐OOCCH=CHFc)(H 2 O) 2 ](H 2 O) 4 } n…
Abstract Three new iron( III ) compounds of formula [Fe(salten)Mepepy][M(dmit) 2 ] · CH 3 CN (M = Ni, Pd, Pt; H 2 salten = 4‐azaheptamethylene‐1,7‐bis(salicylideneiminate); Mepepy = 1‐(pyridin‐4‐yl)‐2‐( N ‐methylpyrrol‐2‐yl) ethane; dmit 2– = 1,3‐dithiole‐2‐thione‐4,5‐dithiolato) have been synthesised and the crystal…
In previous research presentations, we have described the important features of the chorismate --> prephenate reaction using molecular dynamics (MD) and thermodynamic integration studies. This investigation of the reaction in Escherichia coli and water involves QM/MM procedures (SCCDFTB/MM two-dimensional reaction coo…
In this work, we describe the outstanding behavior of a nanocomposite system composed of the thermotropic liquid crystal 5CB doped with nanoparticles of the magnetic iron oxide maghemite (gamma-Fe(2)O(3)). We show that the I-N transition is associated with a reversible gathering of nanoparticles inside droplets of the…
The syntheses of [1,3,5-{(η 2 -dppe)(η 5 -C 5 Me 5 )FeC⋮C-4-C 6 H 4 C⋮C} 3 C 6 H 3 ] ( 1 ) and [(η 2 -dppe)(η 5 -C 5 Me 5 )Fe(C⋮C-1,4-C 6 H 4 C⋮CPh)] ( 2 ) are reported, together with an X-ray diffraction study of 2 . The linear optical spectra of these compounds reveal characteristic low-energy transitions at 430 and…
The optical spectra of nine dinitroaromatic radical anions (1,2- and 1,4-dinitrobenzene, 1,5- and 2,6-dinitro naphthalene, 4,4'-dinitrobiphenyl, 2,7-dinitro-9,9-dimethylfluorene, 2,6-dinitroanthracene, and 2,7- and 1,8-dinitrobiphenylene) in dimethylformamide are reported and analyzed. All have delocalized charge dist…
Abstract Raman microscopy has been used to characterize the interlayer anions in synthesized hydrotalcites of formula Mg 6 Al 2 (OH) 16 (XO 4 )·4H 2 O, where X is S, Mo or Cr. The Raman spectrum shows that both the chromate and molybdate anions are not polymerized in the hydrotalcite interlayer. This lack of polymeriz…
The behavior of a colloidal suspension of rodlike fd viruses in the nematic phase, subjected to steady state and transient shear flows, is studied. The monodisperse nature of these rods combined with relatively small textural contribution to the overall stress make this a suitable model system to investigate the effec…
We report that UV-cross-linked poly(4-vinylpyridine) (P4VP) films acted as reversibly responsive coatings that controlled surface wettability and swelling toward external stimuli: solvent and pH. The polymer films were prepared simply by spin-coating a solution of P4VP followed by UV irradiation. These cross-linked fi…
CO 2 reforming of methane over Ir loaded Ce 0.9 Gd 0.1 O 2− x (Ir/CGO) has been studied between 600 and 800 °C and for CH 4 /CO 2 ratios between 2 and 0.66 in order to evaluate its potential use as an anode material for direct conversion of biogas at moderate temperatures in solid oxide fuel cells. The catalyst exhibi…
Photoinduced primary charge-separation and charge-recombination are characterized by a combination of time-resolved optical and EPR measurements of a fullerene-porphyrin-linked triad that undergoes fast, stepwise charge-separation processes. The electronic coupling for the energy-wasting charge recombination is evalua…
In a previous paper (Michel, M.; Vautier, D.; Voegel, J.-C.; Schaaf, P.; Ball, V. Langmuir 2004, 20, 4835), we showed that phospholipid vesicles can be incorporated into poly(glutamic-acid)/poly(allylamine) (PGA/PAH) multilayered polyelectrolyte films built by the alternated dipping of a surface in polyanion and polyc…
Uniform CePO(4)@LaPO(4) and CePO(4):Tb(3+)@LaPO(4) one-dimensional single-crystalline nanocable heterostructures with highly enhanced photoluminescent emission have been synthesized via a mild and simple hydrothermal approach. The resulting one-dimensional single-crystalline nanocable heterostructures have smooth and…
Abstract Due to increased awareness on the part of end users and pressure from legislators, the composite industry has begun investigating the possibility of increasing the proportion of recycled or biodegradable composite materials. Accordingly, efforts are being deployed to find alternative reinforcement and resin s…
We investigate the effect of defects on the low temperature thermal conductance in nanowire structure by using the scattering-matrix method. It is found the behavior of the thermal conductance versus temperature is qualitatively different for different types of defects. When the defect is void, the universal quantum t…
To clarify the feasibility of using novel chitosan-based hyaluronan hybrid polymer fibers as a scaffold in ligament tissue engineering, their mechanical properties and ability to promote cellular adhesion, proliferation, and extracellular matrix production were studied in vitro. Chitosan fibers and chitosan-based 0.05…
This work demonstrated a facile route for the synthesis of poly(3,5-dimethyl aniline) nanofibers by polymerization of 3,5-dimethyl aniline using Pd-acetate as the oxidant. The reduction of Pd ion is accompanied by oxidative polymerization of 3,5-dimethyl aniline, leading to a metal-polymer composite material. Palladiu…