Materials Literature
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We report on an investigation of the double-layer manganite series ${({\text{La}}_{1\ensuremath{-}z}{\text{Pr}}_{z})}_{1.2}{\text{Sr}}_{1.8}{\text{Mn}}_{2}{\text{O}}_{7}$ $(0\ensuremath{\le}z\ensuremath{\le}1)$, carried out on single crystals by means of both macroscopic magnetometry and local probes of magnetism [muo…
A nonequilibrium molecular dynamics (NEMD) method using stochastic energy injection and removal as uniform heat sources and sinks is developed to calculate the thermal conductivity. The stochastic energy is generated by a Maxwell function generator and is imposed on only a few individual molecules each time step. The…
The mechanism of acetate-assisted transmetalation of tetrapyrroles was investigated in a model system consisting of chlorophyll a and copper(II) acetate in organic solvents by using a spectroscopic and kinetic approach. Surprisingly, acetate ions bind to the central Mg in chlorophyll much more strongly than do acetoni…
We investigate the second-order nonlinear optical properties of a push-pull chromophore in different external and supramolecular environments, through a combined experimental and theoretical approach. In particular, we compare the first hyperpolarizability (beta) of a model dipolar and polarizable chromophore with tha…
Brown lines were generated at the wet-dry interface on Whatman paper No. 1 by suspending the sheet vertically in deionized water. Formic acid and acetic acid were quantified in three areas of the paper defined by the wet-dry boundary (above, below, and at the tideline) using capillary zone electrophoresis with indirec…
Abstract We describe novel procedures which allow the facile production of monochiral single wall carbon nanotube suspensions using either density gradient centrifugation or selective dispersion with special organic polymers. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Abstract Aqueous solutions of carboxyl functionalized single‐wall carbon nanotube (SWCNT) films are deposited on silicon chips by the inkjet printing technique. By varying the film thickness it is possible to obtain low‐ or high density networks of SWCNTs, having either nonlinear or linear current‐voltage characterist…
We report on a facile method for the preparation of biocompatible and bioactive magnetic nanowires. The method consists of the direct deposition of polysaccharides by layer-by-layer (LbL) assembly onto a brush of metallic nanowires obtained by electrodeposition of the metal within the nanopores of an alumina template…
We have investigated the effect of nanometric grain size on electronic-transport, magneto-transport and magnetic properties of single-phase La(0.7)Ba(0.3)MnO(3) (LBMO) nanoparticles having an average grain size in the nanometric regime (21-35 nm). We have observed that both the metal-insulator transition temperature (…
To study the physicochemical properties of the DTTA chelating moiety (H4DTTA = diethylenetriaminetetraacetic acid = N,N'-[iminobis(ethane-2,1-diyl)]bis[N-(carboxymethyl)glycine]), used in several compounds proposed as magnetic resonance imaging (MRI) contrast agents, the methylated derivative H4DTTA-Me (N,N'-[(methyli…
The scanning electrochemical microscope (SECM) combined with a computerized tensile stage was employed to measure the kinetics of electron transfer (ET) reactions at stainless steel electrodes as a function of the applied mechanical stress. Reproducible current versus distance curves were obtained for different values…
The electronic structures of ${\text{SrMn}}_{1\ensuremath{-}x}{\text{Fe}}_{x}{\text{O}}_{3}$ $(0\ensuremath{\le}x\ensuremath{\le}1)$ have been investigated by using photoemission spectroscopy (PES), soft x-ray absorption spectroscopy, and soft x-ray magnetic circular dichroism (XMCD). Both Mn and Fe ions are found to…
Using micromanufactured S-shaped gold strings suspended in free space by means of window-frames, we experimentally demonstrate an electromagnetic meta-material (EM(3)) in which the metallic structures are no longer embedded in matrices or deposited on substrates such that the response is solely determined by the geome…
Abstract A Mode-III crack problem in a functionally graded material modeled by anisotropic strain-gradient elasticity theory is solved by the integral equation method. The gradient elasticity theory has two material characteristic lengths ℓ and ℓ′, which are responsible for volumetric and surface strain-gradient terms…
Abstract The compatibility of engineered surfaces with tissues, cells and biological molecules is critical in development of medical diagnostics, biosensors, drug delivery systems, etc. Nanocrystalline diamond (NCD) films represent group of novel materials with superior electro‐optical, chemical, and mechanical proper…
A high yield of nanostructured CuO bundles with different building blocks is successfully prepared through simple hydrothermal and thermal treatment methods. The microstructure of the as-synthesized samples is characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N 2 physisorption, and IR s…
We herein present a novel and simple synthetic strategy for fabricating multihollow superparamagnetic magnetite/polystyrene nanocomposite microspheres via water-in-oil-in-water double emulsions. Amphipathic magnetite nanoparticles surface-modified with oleic acid act as an oil-soluble emulsifier and sodium dodecyl sul…
We report on preparation of redox-active nanoscale layer-by-layer (LbL) films with polyaminoacid-decorated surfaces that serve for both nucleation and growth of uniformly distributed gold nanoparticles at ambient conditions. We found that a poly- l -tyrosine (pTyr), a synthetic polyaminoacid, was able to direct nanopa…
Since its discovery in liqs. and also in solid matter in 1946, NMR (NMR) has been widely established as a std. tool for structural anal. of a wide range of materials. This review outlines recent NMR studies on materials considered to be useful in spintronic applications. Spintronics is a new research field which combi…
We report on the kinetics of the bromination of free polystyrene (PS) chains in bulk solution and those anchored on flat solid substrates by performing the bromination reaction in different solvents, including nitrobenzene (NB), 1-chlorodecane (CD), 1-chloroundecane (CUD), and 1-chlorododecane (CDD), at various temper…