Saturday, April 5, 2008

bandgap_and _colors














Color and band gap of 3d transition metal oxides


mateials
Band
gap
(eV)
IBulk
Film
(100 nm)
Powder
(10 micron)
alpha
Fe2O3
(Hametite)
2.34


black


Fe3O4
0.05
black

BiFeO3
2.7
black

yellow


NiO
3.4
black

TiO2
3.03colorless










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