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The Influence of crystal structure and surface coating on the photoelectric properties of TiO 2 pigments was studied using the transient photo-EMF. Amorphous TiO 2 did not show any photo-EMF signal showing that it is not a photoconductor. The crystalline TiO 2 modifications, anatase and rutile, behave like n-type photoconductors. In comparison to rutile, the maximum photo-EMF...
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