9.1: Electronic Properties of Materials - Superconductors and Semiconductors Moving from atoms to molecules, we made linear combinations to generate one-electron molecular orbitals (and, in solids, one-electron energy bands). But as in multi-electron atoms, life is not so simple for real molecules and solids that contain many electrons. Electrons repel each other and so their movement in molecules and in solids is correlated. 9.1.1: Prelude to Electronic Properties of Materials - Superconductors and Semiconductors 9.1.2: Metal-Insulator Transitions 9.1.3: Superconductors 9.1.4: Periodic Trends- Metals, Semiconductors, and Insulators 9.1.5: Semiconductors- Band Gaps, Colors, Conductivity and Doping 9.1.6: Semiconductor p-n Junctions 9.1.7: Diodes, LEDs and Solar Cells 9.1.8: Amorphous Semiconductors 9.1.9: Discussion Questions 9.1.10: Problems 9.1.11: References 9.2: Basic Science of Nanomaterials Nanomaterials describe materials of which a single unit is sized (in at least one dimension) between 1 and 1000 nanometers, but is usually 1—100 nm. Nanomaterials research takes a materials science-based approach to nanotechnology, leveraging advances in materials metrology and synthesis which have been developed in support of microfabrication research. Materials with structure at the nanoscale often have unique optical, electronic, or mechanical properties. 9.2.1: Prelude to Basic Science of Nanomaterials 9.2.2: Physics and Length Scales- Cavity Laser, Coulomb Blockade, Nanoscale Magnets 9.2.3: Semiconductor Quantum Dots 9.2.4: Synthesis of Semiconductor Nanocrystals 9.2.5: Surface Energy 9.2.6: Nanoscale Metal Particles 9.2.7: Applications of Nanomaterials 9.2.8: Discussion Questions 9.2.9: Problems 9.2.10: References