SCANNING TUNNELING MICROSCOPY OBSERVATIONS OF LINK STRUCTURES ON RUTILE TiO2(110)-(1 × 2)

Various types of linked structures between added rows on a rutile TiO2(110) surface have been investigated by scanning tunneling microscopy (STM). A new type of linked structure, cycle-link structure comprised of eight oxygen atoms and six titanium atoms, has been observed for the first time on TiO2(110)-(1 × 2) surface. High resolution images for asymmetrical and cycle-link structures directly demonstrate that these link structures are only constructed by Ti3O6 added row model, suggesting that Ti3O6 is the suitable basis unit of the added rows on the TiO2(110) surface.