Structural and electronic properties of elementar defects in semiconductors. Point defects and impurity complexes. Deep levels. Dislocations and grain boundary electronic properties. Measurement techniques for radiative and nonradiative defect centers.
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Structural and electronic properties of elementar defects in semiconductors. Point defects and impurity complexes. Deep levels. Dislocations and grain boundary electronic properties. Measurement techniques for radiative and nonradiative defect centers.
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Fundamentals and recent research developments in the growth and properties of thin crystalline films of electronic and optical materials bythe process of molecular beam epitaxy. Artificially structured materials with quantized electron confinement and artificially engineered electronic band structure properties.
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Structures of inorganic materials: close-packing, linking of simple polyhedra. Factors that control structure: ionic radii, covalency, ligand field effects, metal-metal bonding, electron/atom ratios. Structure property relationships in e.g. spinels, garnets, perovskites, rutiles, fluorites, zeolites, b-aluminas, graphites, common inorganic glasses.
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Introduction to the unifying concepts underlying phas transformations in metals, ceramics, polymers, and electronic materials. Includes the thermodyanamics, kinetics, crystallography and microstructural characteristics of displacive and diffusional transformations. Role of elastics, compositional, configurational, electrical, magnetic and gradientenergy contributions.
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Concepts of stress and strain. Deformation of metals, polymers, and ceramics. Elasticity, viscoelasticity, plastic flow, and creep. Linear elastic fracture mechanics. Mechanisms of ductile and brittle fracture.
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Introduction to structure-property relationships in engineering materials, including polymers, metals, and ceramics. Elastic, plastic, and creep deformation. Fracture processes. Strengthening and toughening mechanisms.
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Introduction to the various intermolecular interactions in solutions and in colloidal systems: Van der Waals, electrostatic, hydrophobic, solvation,H-bonding. Introduction to colloidal systems: particles, micelles, polymers, etc. Surfaces: wetting, contact angles, surface tension, etc.
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Continuation of 222A. Interparticle interactions, coagulation, flocculation, DLVO theory, steric interactions, polymer-coated surfaces, polymers in solution, viscosity in thin liquid films. Surfactant self-assembly: micelles, micro-emulsions, lamellar phases, etc. Surfactantson surfaces: Langmuir-Blodgett films, adsorption, adhesion.
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Description of the principles underlying the optical and luminescent behavior of materials illustrated with applications drawn from phosphors, optical fibers, optical memories, and electro-optical components and immuno-assay techniques. Fundamental concepts of absorption and emission, and their relation to electronic structure and crystal properties.
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Basic quantum mechanics: wave functions and expectation values, free electrons, quantum wells, scattering and tunneling. Basic solid state physics: energy bands in solids, electronic and optical properties of metals and seminconductors. Devices: p-n junctions, transistors, light emitting diodes and lasers.
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Description of the principles underlying the behavior of functional crystals and ceramics, ranging from dielectrics, piezoelectrics, ferroelectrics to linear and nonlinear materials. Fundamental concepts, tensorial and mathematical description of functional behavior, point defects, and applications.
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Electronic and optical properties of thin films grown by vapor phase transport techniques. Growth mechanisms, kinetics and thermodynamics of vapor phase epitaxy. Special emphasis on the process of metalorganic vapor phase epitaxy for optoelectronic materials and devices.
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Basic computational techniques and their application to simulating the behavior of materials. Techniques include: finite difference methods, MonteCarlo, molecular dynamics, cellular automata, and simulated annealing.
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Review field equations of elasticity and plasticity. Energy principles and uniqueness theorems. Elementary problems in one and two dimensions, stress functions, and complex variable methods. Plastic stress-strain laws; flow potentials. Torsion and bending of plastic flow, slip line theory.
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Plastic, creep, and relaxation behavior of solids. Mechanics of inelastically strained bodies, plastic stress-strain laws; flow potentials.torsion and bending of prismatic bars, expansion of thick shells, plane plastic flow, slip line theory. Variational formulations, approximate methods.
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Analytic solutions of a stationary crack under static loading. Elastic and elastoplastic analysis. The J integral. Energy balance and crack growth. Criteria for crack initiation and growth. Dynamic crack propagation. Fatigue. The micromechanics of fracture.
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An introduction to molecular and microscale theories for the viscoelastic behavior of complex fluids: suspensions, colloidal dispersions, liquid crystals, dilute polymer solutions.
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Continuation of Materials 238A: Emphasis of the second term is on concentrated systems and polymeric liquids, reptation theory and extensions of reptation theories to complex architectures in the linear viscoelastic regime. Nonlinear Rheology for polymers.
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Definitions and basic element operations displacement approach in linear elasticity. Element formulation: direct methods and variational methods. Global analysis procedures: assemblage and solution. Plane stress and planestrain. Solids of revolution and general solids. Isoparametric representation and numerical integration. Computer implementation.
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Fundamental concepts and mathematical descriptions of mass and energy transport as pertinent to the synthesis, processing and application of materials. Focus on transport problems within solids and at their interfacewith fluids. Emphasis on inorganic materials, including semiconductors.
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Fundamental concepts are presented for the synthesis of inorganic materials (zeolites, mesoporous materials, and epitaxial films) via chemical routes, and the processing of powders to form engineering shapes. The latter stresses fundamentals for manipulating the forces between particles that control rheological properties, particle packing and the plastic/elastic transition.
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Mass transport and kinetic sintering theories. Thermodynamics of pore phase disappearance. Grain growth during densification. Effects of a liquidphase (liquid phase sintering). Effects of inert phases on densification. Effects of applied pressure. Control of grain growth after densification.
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Thermotropic and lyotropic liquid crystals (LC's). Classification and phasetransitions. LC's in display technology. Laboratory experimentation using x-ray diffraction and polarized optical microscopy to characterize LC phases.
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Stress and strain relations in composites. Residual stresses. The fracture resistance of organic and inorganic matrix composites. Statistical aspects of fiber failure. Composite laminates and delamination cracks. Cumulative damage concepts. Interface properties. Design criteria.
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