A cross-sectional scanning tunneling microscopy study of IrO2 rutile single crystals

作者：Pai Woei Wu^*; Wu T Y; Lin C H; Wang B X; Huang Y S; Chou H L

来源：Surface Science, 2007, 601(12): L69-L72.

DOI：10.1016/j.susc.2007.04.227

• cross-sectional STM
• XSTM
• IrO2
• STM
• rutile

Rutile iridium dioxide (IrO2) surfaces were studied by cross-sectional scanning tunneling microscopy (XSTM). Atomically flat surfaces prepared by in situ ultra high vacuum cleaving of crystalline platelets of thicknesses < 50 mu m were successfully demonstrated. In addition to (110) surface, several vicinal planes, e.g., (120), (130) and similar to (891), were also examined. The cleaved planes are close to bulk-terminated surfaces with predominant [001]-oriented bridge oxygen rows. Unlike TiO2, bright oxygen rows are imaged and oxygen defects appear as dim species. Our studies show that XSTM is a viable technique to study oxide surfaces that are otherwise difficult to prepare.

• 出版日期2007-6-15