Materials Literature
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The local structure about the Mn site in the half-doped system ${\text{La}}_{1∕2}{\text{Ca}}_{1∕2}{\text{MnO}}_{3}$ was measured in magnetic fields up 10 T to probe the melting of the charge-ordered state. Examination of the Mn-O and Mn-Mn correlations reveals three distinct regions in the structure-field diagram. A b…
Abstract This note deals with the efficient approximation of a non‐linear constitutive relation arising in the study of the three‐dimensional mechanical behaviour of shape memory alloys at constant temperature. In particular, a variable time‐step discretization is investigated. For such an algorithm we prove sharp err…
The dynamic scattering factor S ( Q ,ω) was measured by high-resolution inelastic X-ray scattering using intense X-rays from a third-generation synchrotron radiation facility. The observed spectra demonstrate the existence of longitudinal propagating modes at small Q values, although the collective excitations are hig…
Photoconductivity and various photo-magnetotransport properties have been studied in quantum paraelectric SrTiO 3 crystals. SrTi 16 O 3 shows giant photoconductivity, as reported before. The photodoped carrier in the 16 O system is of electron type and has high mobility beyond 10 4 cm 2 V -1 s -1 at 5 K. Its number ca…
Carbon nanorods were produced with a yield of about 90% by the copyrolysis of C(6)H(6) and C(5)H(6) at 600 degrees C under the cocatalysis of Fe and Mg. Many novel Y-junction carbon nanorods were found in the products. The obtained carbon nanorods have a diameter in the range of 200-350 nm and are several micrometers…
We report the in situ formation of semiconductor and metal nanoparticles (NPs) on colloid particles precoated with weak polyelectrolyte multilayers. Poly(acrylic acid) (PAA)/poly(allylamine hydrochloride) (PAH) multilayers were assembled on the colloid spheres by the layer-by-layer technique and by exploiting copper i…
A biodeterioration study was performed on synthetic polymeric materials including homogenous film made from poly(tetrafluorine ethylene), copolymer film made from tetrafluorine ethylene and perfluoromethyl vinyl ether, vulcanized rubber containing natural caoutchouc, and vulcanized rubber, the main component of which…
Abstract Adsorption of CO and O 2 on Pd particles deposited on a well-ordered Fe 3 O 4 (111) film was studied by temperature programmed desorption. Scanning tunneling microscopy was used to provide structural information. The results show that CO adsorbed on Pd particles reacts with oxygen of the oxide support and for…
The origin of the antiferromagnetic order and puzzling properties of LaTiO_3 as well as the magnetic phase diagram of the perovskite titanates are studied theoretically. We show that in LaTiO_3, the t_{2g} degeneracy is eventually lifted by the La cations in the GdFeO_3-type structure, which generates a crystal field…
Owing to the use of porphyrins in photodynamic therapy for the treatment of malignant tumors, and the preferential interaction of lectins with tumor cells, studies on lectin-porphyrin interaction are of significant interest. In this study, the interaction of several free-base and metalloporphyrins with Momordica chara…
Deposition processes of bismuth oxides have been investigated using the Bi(C 6 H 5 ) 3 precursor. The role of the MOCVD parameters has been evaluated through the study of both the precursor sublimation and the entire CVD process depending on the temperature and the reactor environment. In the 350−450 °C range, Bi 2 O…
The phase behavior of model linear and bent-core molecules has been studied using isothermal-isobaric Monte Carlo computer simulations. The molecular model consists of seven Lennard-Jones spheres rigidly arranged in a "V" shape, with external bond angle, gamma. With gamma=0 degrees (linear molecules), we find isotropi…
The efficiency of conventional diffractive optical elements with échelette-type profiles drops rapidly as the illumination wavelength departs from the blaze wavelength. We use high dispersion of artificial materials to synthesize diffractive optical elements that are blazed over a broad spectral range (approximately 1…
The influence of gravity on the long-time behavior of the mean squared displacement in glasses of polydisperse colloidal hard spheres was studied by means of real-space fluorescent recovery after photobleaching. We present, for the first time, a significant influence of gravity on the mean squared displacements of the…
Local magnetization and current distribution in (La(1-y)Pr(y))0.7Ca0.3MnO3 (y=0.7) crystals are studied by a magneto-optical (MO) imaging technique. MO images below 120 K visualize inhomogeneous magnetization and conduction paths that manifest the percolative conduction originated from the mesoscopic phase separation…
Abstract The adsorption of methanol on the clean and oxygen precovered Cu(111) surface was studied by means of high resolution X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), and temperature programmed desorption (TPD). On clean Cu(111) methanol is adsorbed molecularly at 100 K. O…
Results of a study on the ability of aminophosphonates to inhibit CaCO 3 nucleation are reviewed. Species discussed include ethylene-, butylene-, pentylene-, and hexamethylene-diaminetetramethylenephosphonate. These species form a homologous series differing only in the number of methylene linkages separating amine fu…
Local variations in filler particle concentration and/or shape and orientation in static filler/polymer composites are modelled as distributions of percolation thresholds. The concentration variations can be due to insufficient mixing, formation of semicrystalline voids during cooling from the melt, shrinkage during p…
The magnetic and transport properties of the Co2FeGa Heusler alloy have been investigated. The results show that the temperature dependence of the magnetization follows the spin-wave behaviour at low temperature. The electrical resistivity behaves according to a ~T2 power law, which may be mainly attributed to electro…
PART 1: TISSUE EXCHANGE AND TISSUE DEVELOPMENT 1. The State-of-the-Art in Tissue Exchange 2. Objectives of Tissue Engineering 3. Elements of Tissue Development PART 2: TISSUE ENGINEERING FUNDAMENTALS 4. Cell Growth and Differentiation 5. Cell and Tissue Mechanics 6. Cell Adhesion 7. Cell Migration 8. Cell Aggregation…