Materials Literature
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Biofunctionalized nanocolloids offer a promising platform for creation of novel materials using addressable interactions. Crystalline phases are of especial interest for the development of novel plasmonic, magnetic, and catalytic metamaterials. When flexible single-stranded linker DNAs are added to the mixture of two…
Nanocube-based pagoda-like PbS hierarchical architectures have been fabricated by hydrothermal treatment of Pb(Ac) 2 and L-cysteine solution. It was suggested that a biomimetic mineralization process happened during the growth of the hierarchical architectures. The biomolecule, L-cysteine, exerts coordination, oriente…
The crystal structure of a mineral may be divided into two parts: (1) the structural unit , an array of high-bond-valence polyhedra that is usually anionic in character, and (2) the interstitial complex , an array of large low-valence cations, simple anions and (H 2 O) groups that is usually cationic in character. Int…
The enhancement of the spin-lattice relaxation rate for nuclear spins in a ligand bound to a paramagnetic metal ion [known as the paramagnetic relaxation enhancement (PRE)] arises primarily through the dipole-dipole (DD) interaction between the nuclear spins and the electron spins. In solution, the DD interaction is m…
DC conductivity and ac impedance measurements were made in air and in vacuum on samples of low density polyethylene to which nano-sized and micro-sized ZnO particles and a dispersant had been added. The samples were 150-200 mum thick. The temperature range was 30-70degC. The temperature dependence of the vacuum dc con…
Abstract Fuel cell vehicles running on hydrogen are seen as the long term solution to enable sustainable mobility. Compressed hydrogen gas storage systems are a promising route for storing hydrogen on board of vehicles, provided that a reliable and cheap material capable of withstanding hydrogen embrittlement is found…
Interaction between anionic (and cationic) colloidal particles of silica having the particles diameters 12 and 22 nm with synthetic cationic (and anionic) polyelectrolytes of various nature and structure was studied by potentiometric, conductimetric spectroturbidimetric and viscometric methods in aqueous solution. It…
The aim of this study was to investigate the influence of incorporating Bis-EMA4 monomer into experimental Bis-GMA/TEGDMA-based resin luting agents on the bond strength to dentin. Seven mixtures were prepared with the following ratios (wt%) of Bis-GMA/TEGDMA/Bis-EMA4: 50/50/0, 50/30/20, 50/10/40, 50/0/50, 30/10/60, 10…
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This paper examines the link between polymer structure, temperature, and thermomechanics of shape-memory polymer networks. Strain to failure of the networks was extremely dependent on test temperature and reached a significant maximum near the onset of glass transition; a phenomenon denoted the deformability peak. A n…
We describe the synthesis and supramolecular properties of a bifurcated molecule decorated with two units of an in-house receptor for [60]fullerene, based on the electron donor exTTF, and a PC 61 BA derivative as recognizing units. This monomer self-assembles to form arborescent and dynamically polydisperse supramolec…
BACKGROUND: Targeted liposomes can be broadly defined as liposomes that are engineered to interact with a particular population of cells with the objective of delivering a payload or increasing their retention within the targeted cell population by means of a chemical interaction with cell-surface molecules or other t…
Nanostructured praseodymium oxides were successfully prepared via four different methods: two traditional methods (calcination of praseodymium nitrate and sol−gel method with propylene oxide) and two more sophisticated, modern techniques (citrate method and modified Pechini method). Powder X-ray diffraction revealed t…
A new lead-free perovskite solid solution of (1−x)BaTiO3–xBiAlO3 (x=0.02, 0.05, 0.10, and 0.15) that exhibits ferroelectric properties and relaxor behavior has been synthesized by solid state reactions. X-ray diffraction patterns show a transformation from the tetragonal symmetry into a rhombohedral symmetry as a resu…
Organized assembly remains a major challenge for optimizing and extending the application of nanoparticles. Here we report a simple method to assemble spherical gold nanoparticles (AuNPs) in one-dimensional (1D) chains. The chain-forming process takes advantage of asymmetrically functionalized AuNPs that serve as buil…
LaF 3, CeF 3, CeF 3:Tb 3+, and CeF 3:Tb 3+ @LaF 3 (core−shell) 2D nanoplates have been successfully synthesized by a facile and effective hydrothermal process. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM),…
A novel sol-gel synthesis, in which a surfactant acts to make the pore size of the gel network more coarse and uniform, is shown to provide an effective alternative for the consolidation of stone. The new mesoporous silica avoids the main inconvenience of current commercial consolidants, which is their tendency to cra…
Abstract Facing increasing demands for multifunctional solutions, the classical strategy of the metallurgist to improve properties, using microstructural refinement, reaches its limits: very often the function is not provided by the property only, but by the interplay between the shape, the properties, and possible as…
The antivortex is a fundamental magnetization structure which is the topological counterpart of the well-known magnetic vortex. We study here the ultrafast dynamic behavior of an isolated antivortex in a patterned Permalloy thin-film element. Using micromagnetic simulations we predict that the antivortex response to a…
Ni 50 Mn 35 In 15 is a newly found ferromagnetic shape memory alloy that displays exotic properties such as inverse magnetocaloric effect and large magnetoresistance at moderate field values. Since the Mn content in this compound is more than the stoichiometric (X 2 YZ) Heusler composition, the magnetic and electronic…