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Surface Structural Determination of SrTiO3(100) surface using AR-MSRI


EMSL Project ID
1972

Abstract

This proposal involves using angle-resolved mass-spectroscopy of recoiled ions (AR-MSRI) to investigate the surface structure of SrTiO3(100). A stoichiometric SrTiO3(100) surface has two possible non-polar surface terminations: a SrO-terminated surface and a TiO2-terminated surface. The structural determination of SrTiO3(100) surface is essential for the understanding of the surface chemistry on SrTiO3(100). The TiO2 terminated SrTiO3(100) surface shows a different geometric arrangement of surface Ti and O atoms as compared with TiO2 (110) and (100) surfaces. Instead of rows of two-coordinate bridging oxygen atoms lying above rows of Ti atoms as on TiO2 (110) and (100) surfaces, the TiO2-terminated SrTiO3(100) surface has the cations in the same plane as the oxygen anions, showing no bridging oxygen on the surface. Thus the TiO2-terminated SrTiO3(100) surface offers an opportunity to further study the influence of surface structure (surface atomic arrangement or surface bonding configuration), including the role of the bridging oxygen atoms, on the adsorption and desorption of H2O by comparing the results with those from TiO2 surfaces.

Project Details

Project type
Exploratory Research
Start Date
2000-08-01
End Date
2002-03-31
Status
Closed

Team

Principal Investigator

Li-Qiong Wang
Institution
Brown University