[15p-P4-1~15] 6.6 Probe Microscopy

[15p-P4-9] Characterization of TiO₂(011)-(2×1) Surface by AFM/STM

〇(PC)Jo Onoda^1,2, Ayhan Yurtsever³, Masayuki Abe³, Chi Lun Pang⁴, Yoshiaki Sugimoto^1,2 (1.Univ. of Tokyo, 2.GSE, Osaka Univ., 3.GSES, Osaka Univ., 4.UCL)

Keywords:titanium dioxide, atomic force microscopy, scanning tunneling microcopy

TiO₂ has been investigated for several decades since it is discovered as an active photocatalyst. This has led to numerous surface science studies focused on the most thermodynamically stable rutile TiO₂(110) surface. On the other hand, there is a growing interest in other rutile termination faces such as TiO₂(011) because of its enhanced photoactivity. So far, the studies of TiO₂(011) by scanning tunneling microscopy (STM) and first principle calculations revealed that “beanlike” and “zigzag” motifs appear in images recorded “close to” and “far from” the surface, respectively. On the other hand, there are a few studies of the TiO₂(011) surface by atomic force microscopy (AFM). We will present our recent results of TiO₂(011) surface investigated by AFM and STM. AFM images of the TiO₂(011)-(2×1) reconstructed surface were observed for the first time with the atomic resolution. Simultaneously recorded AFM/STM images reveal that the AFM and STM zigzags are in phase with each other and therefore may have a similar origin.