Materials Literature
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Temperature, concentration of the solvent and pressure are the parameters that are well known to bring about phase transitions in liquid-crystalline systems. In recent years a new parameter has been added to this list: light. The principle behind these photoinduced transitions is the light-driven shape transformation…
This second edition has been extensively updated to keep pace with the growing use of composite materials in commercial aviation. A worldwide reference for repair technicians and design engineers, the book is an outgrowth of the course syllabus that was developed by the Training Task Group of SAE's Commercial Aircraft…
Thin polystyrene films (prepared in a sandwich geometry between two aluminum electrodes) develop a characteristic pattern in ambient air when kept above the glass-transition temperature, whereas they remain unchanged in vacuum or in a pure nitrogen atmosphere. Measurements by broadband dielectric spectroscopy, capacit…
Abstract Orthorhombic H 2 V 3 O 8 single‐crystal nanobelts with a thickness of less than 30 nm and a length up to several hundreds of micrometers have been synthesized using bulky divanadium pentoxide powders as a precursor. The synthetic process is free of any templates and reducing agents. Divanadium pentoxide under…
Thanks to the various advantages such as lighter weight, reduced sink mark, and short cycle times, foam injection molding is being widely used for production of pallets and footwear. However, the properties of the foamed parts are somewhat decreased and result in swirl marks on the surface. So this technology is not s…
Abstract Metal nanoparticles‐on‐smooth‐electrode (NOSE) was used as the substrate in a potential‐dependent surface‐enhanced hyper‐Raman(SEHRS), hyper‐Rayleigh(SEHRyS) and Raman (SERS) study of adsorbed molecules of pyridine, pyrazine and benzene. The three molecules are chosen because they are known to adsorb in diffe…
Abstract The reaction of silver triflate (AgOTf) and silver dodecyl sulfate (AgDOS) with two nonmesomorphic 4,4'‐disubstituted 2,2'‐bipyridines, L n , yielded a series of bis‐chelate ionic silver complexes [Ag(L n ) 2 ]X. Complexation induced columnar mesomorphism in all the silver( I ) tetra‐branched bipyridine deriv…
Abstract Surface‐enhanced resonant Raman scattering (SERRS) spectra of Rhodamine 6G (R6G) were acquired from single (aggregated) Ag colloidal particles that had been incubated with various amounts of R6G (0.1–125 n M ). The spectra were investigated in detail and the evidence for a single‐molecule‐like response was fo…
Abstract The synthesis, structure, and physical properties of the oxalate‐based molecular magnets with the formula [Z II (bpy) 3 ][ClO 4 ][M II Fe III (ox) 3 ] (Z II = Fe, Ru; M II = Mn, Fe; bpy = 2,2'‐bipyridine; ox = oxalate dianion) are presented here. All compounds are isostructural and crystallize in the chiral c…
Abstract This paper summarizes a series of results where the main role of the charge‐transfer (CT) mechanism in the surface‐enhanced Raman scattering (SERS) of aromatic molecules is demonstrated. This mechanism consists on a photoinduced CT process between nanostructures of the metallic surface and the adsorbed molecu…
Systematic studies of ferroelectric domain reversal of strontium barium niobate (Sr0.61Ba0.4Nb2O6 or SBN:61) single crystals by electric-field poling using liquid electrodes are reported. In contrast with previous studies using metal electrodes, it is shown that repeated domain reversal does not lead to polarization f…
Within the last few years there has been an explosive growth in published reports on the use of electrospinning as a method of generating scaffolds intended for biomedical applications. Specific advantages of electrospun scaffolds (high surface-to-volume ratio, controlled porosity, and flexibility to conform to a wide…
Abstract Protein crystallization offers great potential in downstream processing of pharmaceutical protein active ingredients. The advantages, which are well known and widely utilized in low‐molecular weight crystallization, can also be expected to be found to some extent in protein crystallization. However, there is…
The effects of dealumination, pore size, and calcination on the efficiency (as expressed in the relaxivity) of Gd3+-loaded zeolites for potential application as magnetic resonance imaging (MRI) contrast agents were studied. Partial dealumination of zeolites NaY or NaA by treatment with (NH4)2SiF6 or diluted HCl result…
Moisture equilibrium data of mango pulp were determined using the static gravimetric method. Adsorption and desorption isotherms were obtained in the range of 30-70 ºC, to water activities (a w) from 0.02 to 0.97. The application of the GAB model to the experimental results, using direct nonlinear regression analysis,…
In this work, azobenzene-containing colloidal spheres have been fabricated and used to construct photoresponsive monolayers. The colloidal spheres were prepared from an amphiphilic azobenzene-containing random copolymer through hydrophobic aggregation of the polymer chains, which was induced by adding the selective so…
Ultralong single-crystalline TiO(2) nanowires were prepared by a simple, low-cost solvothermal process. Silver nitrate, neodymium chloride, ceric nitrate, stannic chloride hydrate, and cadmium chloride were used as metal sources and deposited by reduction on the surface of TiO(2) nanowires. The composites were subsequ…
Abstract Different kind of drugs can be loaded into the porous silicon microparticles for oral dosing. In cases where the drug is in its crystalline form in the pores, the amount of the loaded drug can be determined accurately using a calorimetric method, thermoporometry. Even if the drug substance is not in crystalli…
Palladium nanocrystals were grown on a nanostructured SrTiO(3)(001) surface and annealed in ultrahigh vacuum at 620 degrees C. This leads to the so-called strong metal-support interaction (SMSI) state, characterized by encapsulation of the metal clusters with an oxide layer. Scanning tunneling microscopy (STM) of the…
Electrospinning has been recognized as an effective way to produce polymeric fibers from solution and molten states. However, the use of electrostatic attraction to deform or elongate a liquid or polymer is not a modern discovery. There is evidence of this technology dating back over 400 years. Modern science has, how…