Two-dimensional phase separation of block copolymer and homopolymer blend studied by scanning near-field optical microsc...
ESR study of magnetic structures in La0.7Ca0.3MnO3
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Coordination of decisions in a spatial agent model
For a binary choice problem, the spatial coordination of decisions in an agent community is investigated both analytically and by means of stochastic computer simulations. The individual decisions are based on different local information generated by the agents with a finite lifetime and disseminated in the system with a finite velocity. We derive ...
Thermal properties of hot-stage extrudates of itraconazole and eudragit E100 - Phase separation and polymorphism
Solid dispersions of itraconazole and eudragit E 100 were prepared by hot-stage extrusion. Analysis of the physical structure revealed the existence of different phases, depending on the manufacturing condition. Extrudates prepared at 453 K existed as a molecular dispersion of itraconazole in eudragit E100 when the drug concentration did not exceed...
A new tetragonal phase in La-rich Pr2-xLaxCuO4 (1.35
Effect of substrate orientation on phase separation in epitaxial GaInAsSb
Published in Journal of Electronic Materials
The effect of substrate misorientation on phase separation in Ga1−xInxAsySb1−y nominally lattice matched to GaSb is reported. The layers were grown at 575°C by organometallic vapor phase epitaxy on vicinal (001) GaSb substrates, miscut \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb}...
The Ergodic Theory of Traffic Jams
Published in Journal of Statistical Physics
We introduce and analyze a simple probabilistic cellular automaton which emulates the flow of cars along a highway. Our Traffic CA captures the essential features of several more complicated algorithms, studied numerically by K. Nagel and others over the past decade as prototypes for the emergence of traffic jams. By simplifying the dynamics, we ar...
Detection and Characterization of Membrane Microheterogeneity by Resonance Energy Transfer
Published in Journal of Fluorescence
The application of resonance energy transfer (RET) in the study of heterogeneity in membrane systems is described. Useful formalisms for monophasic and biphasic systems are presented, together with quantitative studies. Evidence for reduction of dimensionality, probe segregation, and microdomain sizes in these systems is discussed. Selected example...
A nanometre-scale non-periodic structural variation in high temperature superconducting ceramics and the implications fo...
Non-periodic structural variation has been found in the high Tc cuprates, YBa2Cu3O7-x and Hg0.67Pb0.33Ba2Ca2Cu 3O8+δ, by image analysis of high resolution transmission electron microscope (HRTEM) images. We use two methods for analysis of the HRTEM images. The first method is a means for measuring the bending of lattice fringes at twin planes. The ...
Elaboration et étude de couches minces de manganites à valence mixte
Cette thèse est dédiée à l'étude d'oxydes de Mn du type L1-xAxMnO3 (L=La, A=CA, Sr) pour x=1/3. Ces composés présentent une transition paramagnétique-ferromagnétique avec une Tc proche de 300K. Dans le régime paramagnétique, la résistance électrique présente un comportemtent semiconducteur et un caractère métallique pour des températures inférieure...
