1. Northwestern University 04-20-04 Selected ZnO Properties - Molecular mass 81.389 - Specific gravity at room temp. 5.642 g/cm3 - Point group 6mm (Wurtzite) - Lattice constants at room temp. a=3.250, c=5.205 - Mohs hardness 4 - Melting point 2250 K - RT linear thermal expansion coefficient - a-axis direction 4.75 - c-axis direction 2.92 - Electron mass 0.28 - Hole mass 1.8 - Bandgap energy at room temp. 3.37 eV - Exciton binding energy 60 meV - Specific heat 0.125 cal/gm - Thermal conductivity 0.006 cal/cm/K - Thermoelectric Constant at 573 K 1200 mV/K - Point group 6mm (Wurtzite) - Lattice constants at room temp. a=3.250, c=5.205 - Melting point 2250 K - a-axis direction 4.75 - c-axis direction 2.92 - Electron mass 0.28 - Hole mass 1.8 - Bandgap energy at room temp. 3.37 eV - Exciton binding energy 60 meV Resistivity depends on dopent. Direct bandgap For intrinsic thin films  =1500  cm perpendicular to substrate  ~10 9  cm parallel to substrate -Specific gravity at room temp. 5.642 g/cm3 Single crystal  =1-10  cm

2. Northwestern University 04-20-04 ZnO structure

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6. Northwestern University 04-20-04 AlB 2 ??

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9. Northwestern University 04-20-04 InAs Crystal structureZinc Blende Energy Gap 0.354 eV Intrinsic carrier concentration1·10 15 cm -3 Intrinsic resistivity0.16 Ω·cm

10. Northwestern University 04-20-04 InAs Nanowire

11. Northwestern University 04-20-04 InAs 1 2 3 4 5 6

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