STM and atomic-resolution noncontact AFM of an oxygen-deficient TiO2(110) surface

Authors
Ashino, M Uchihashi, T Yokoyama, K Sugawara, Y Morita, S Ishikawa, M
Citation
M. Ashino et al., STM and atomic-resolution noncontact AFM of an oxygen-deficient TiO2(110) surface, PHYS REV B, 61(20), 2000, pp. 13955-13959
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
61
Issue
20
Year of publication
2000
Pages
13955 - 13959
Database
ISI
SICI code
0163-1829(20000515)61:20<13955:SAANAO>2.0.ZU;2-U
Abstract
We present atom-resolved images of oxygen-deficient TiO2(110) by scanning t unneling microscopy (STM) and noncontact atomic force microscopy (NC-AFM). Although STM images emphasized variations of Ti-atom density underneath the surface oxygen, NC-AFM images directly traced defect-induced structures of topmost oxygen atoms. We first found the (1 x 3) phases was not composed o f missing TiO2 units but added Ti2O3 rows. We observed the deformed (1 x 3) phase by half steps along [001], which well explains that diffusion and ad sorption of segregated impurities help in the formation of (1 x 3) phases.