Epilayer control of photoassisted oxidation and reduction on the ferroelectric PbTiO3 polar surface was investigated. Photo-oxidation of a AgNO3 electrolyte resulting in formation of Ag7 NO11 particles was observed on the PbTiO3 /Nb: SrTiO3 film surface; whereas PbTiO3 / SrRuO3 / SrTiO3 leads to AgNO3 reduction under UV illumination. The oxidation reaction resulting in the formation of Ag7 NO11 is explained in terms of a rectifying interface between PbTiO3 and Nb: SrTiO3, controlling the charge transport during UV photocatalysis.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)