Materials Literature
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The thermal decomposition behavior of poly(ether imide) (PEI)/carbon fiber composites used in aeronautical field was studied using thermogravimetric analysis in an inert atmosphere, at several heating rates between 2 and 10°C min −1 . The activation energies ( E a ) were determined by Flynn–Wall–Ozawa (FWO) and Kissin…
Living plants growing on mine waste were assisted to accumulate gold to a concentration greater than 3500 mg kg –1 (0.35%) dry weight. Where Au was the only high-density metal present in the soil at high concentration, discrete biogenic nanoparticles of the metal were observed in preparations of shoot and leaf biomass…
Abstract In this report, we describe fabrication and electrochemical‐performance testing of tubular, anode‐supported fuel cells based on the protonic ceramic BaCe 0.2 Zr 0.7 Y 0.1 O 3–δ (BCZY27). These devices are comprised of a 20‐μm‐thick BCZY27 electrolyte spray‐coated and co‐fired onto an extruded, tubular 9.8‐mm‐…
Photothermal therapy is a therapy in which photon energy is converted into heat to kill cancer. The purpose of this study is to evaluate the in vivo efficacy of photothermal therapy, toxicity and hepatic and renal function of polyaniline nanoparticles (PANI-Np) in a tumor-bearing mice model. The in vivo efficacy of na…
Natural fiber reinforced composites have replaced the existing conventional materials due to its light weight and enhanced load-bearing capabilities. In the present work, the newly identified snake grass ( Sansevieria ehrenbergii) fiber-reinforced isophthalic polyester composites are prepared by simple hand lay-up met…
Lead-based quantum dots (QDs) can be tuned to emit in the transparent region of the biological tissue (700 to 1100 nm) which make them a potential candidate for optical bioimaging. However, to employ these QDs as biolabels they have to retain their luminescence and maintain their colloidal stability in water, physiolo…
We compare the morphology and optical response of plasmonic nanostructures produced by pulsed laser deposition, consisting of a 2D distribution of Ag nanoparticles exposed to air or buried under an amorphous Al 2 O 3 layer whose thickness is tuned in the 0.5 to 14 nm range. We observe that the covering process leads t…
Stable multilayer films have been fabricated on the basis of alternating layer-by-layer assembly of an azulene-based supra-amphiphile and a photoreactive polyanion. Moreover, one component of the supra-amphiphile, pyrene, can be removed from the multilayer films, generating functional surface-imprinted multilayer film…
Inelastic neutron scattering measurements demonstrate that the magnetic interactions in antiferromagnetic LaFeAsO are two dimensional. Spin-wave velocities within the Fe layer and the magnitude of the spin gap are similar to the $A$Fe${}_{2}$As${}_{2}$ based materials. However, the ratio of interlayer and intralayer e…
Alkoxysilyl derivatives of dibenzoylmethanatoboron difluoride (DBMBF2) are synthesized by the hydrosilylation reaction of the corresponding O-allyl derivatives of DBMBF2 with triethoxysilane. The photophysical properties of the synthesized O-allyl and alkoxysilyl derivatives are investigated. It is found that the abso…
Organoplatinum(IV) complexes, [PtBrMe 2 (CH 2 -4-C 6 H 4 -N═N-Ph)(NN)], containing trans -azobenzene functional groups, have been prepared by trans oxidative addition of BrCH 2 -4-C 6 H 4 -N═N-Ph to the corresponding platinum(II) complexes [PtMe 2 (NN)], with NN = 2,2′-bipyridine, 1,10-phenanthroline, 4,4′-bis(ethoxyc…
An aromatic azo-polymer, poly(thiourea-azo-naphthyl), has been synthesized using 1-(5-thiocarbamoylaminonaphthyl)thiourea and diazonium salt solution of 2,6-diaminopyridine. Poly(thiourea-azo-naphthyl) was easily processable using polar solvents and had high molar mass, 57 × 10 3 g/mol. Electrically conducting and mec…
We have demonstrated the size-dependent charge specific surfactant induced aggregation and subsequent deaggregation of allylamine-capped silicon quantum dots (Si-QDs) by means of photoluminescence (PL) spectroscopy, dynamic light scattering (DLS), and imaging techniques. The heterogeneous size distribution of allylami…
Phase-change materials are the alloys at the heart of an emerging class of next-generation, non-volatile digital memory technologies. However, the widely studied Ge-Sb-Te system possesses several undesirable properties, and enhancing its properties, e.g. by doping, is an area of active research. Various first-row tran…
Boron-phenylpyrrin dyes: In the presence of BF3⋅OEt2, 4-(diethylamino)salicylaldehyde reacts with substituted pyrroles to give boron-phenylpyrrin dyes, which contain a central boron-containing seven-membered ring. Upon protonation in acidic solution, the complexes, with a large Stokes shift, exhibit a color change and…
A ternary photocontrollable assembly was hierarchically constructed by the "orthogonal" host-guest interaction of different types of cyclodextrins toward the porphyrin and azobenzene. Spectroscopic titrations and microscopic investigations demonstrate that the inclusion complex of azobenzene modified water-soluble por…
In this Rapid Communication, we study an effective model for the normal state of iron-based superconductors. It has separate but interacting itinerant and localized degrees of freedom, originating from the ${d}_{xz}$ and ${d}_{yz}$ and from the ${d}_{xy}$ iron orbitals, respectively. At low temperatures, below a mean-…
The nature of structural relaxation in disordered systems such as amorphous silicon ($a$-Si) remains a fundamental issue in our attempts at understanding these materials. While a number of experiments suggest that mechanisms similar to those observed in crystals, such as vacancies, could dominate the relaxation, theor…
We have studied the influence of adding propylene glycol to both aqueous dispersions of fumed silica nanoparticles and emulsions of paraffin liquid and water stabilized by the same particles. In the absence of oil, aerating mixtures of aqueous propylene glycol and particles yields either stable dispersions, aqueous fo…
We simulate colloids (radius R ~ 1 μm) trapped at the interface between a cholesteric liquid crystal and an immiscible oil at which the helical order (pitch p) in the bulk conflicts with the orientation induced at the interface, stabilizing an ordered array of disclinations. For a weak anchoring strength W of the dire…