5 bond angle

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Unformatted text preview: 0_mbe.htm 22 Popula\on of Atomic Orbitals 24 Silicon Core and Valence Electrons 25 Bond Types •  Ionic Bonding –  Electron transfer –  Coulomb a5rac\on balanced by repulsion of nuclei •  Covalent Bonding –  Electron sharing –  Si, Ge, C •  Mixed Ionic- Covalent Bonding –  Electronega\vity –  Polar covalent bonds –  GaAs, InP, GaN •  Metallic Bonding –  Posi\ve cores in an electron sea –  Typical for atoms with 3 or less valence electrons 26 http://www.abc.net.au/science/articles/2010/04/14/2872429.htm Orbital Wave Func\on Shape http://winter.group.shef.ac.uk/orbitron/ 27 sp3 Hybridiza\on •  The sp3 hybrids are obtained by adding and subtrac\ng all combina\on of s and p wavefunc\ons ( ) ( ) ( ) ( ) 1 ψ s + ψ px + ψ py + ψ pz 2 1 ψ 2 = ψ s − ψ px − ψ py + ψ pz 2 1 ψ 3 = ψ s + ψ px − ψ py − ψ pz 2 1 ψ 4 = ψ s − ψ px + ψ py − ψ pz 2 ψ1 =...
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