Three-dimensional interaction force and tunneling current spectroscopy of point defects on rutile TiO2(110)
Applied Physics Letters
American Institute of Physics Inc.
Item Usage Stats
The extent to which point defects affect the local chemical reactivity and electronic properties of an oxide surface was evaluated with picometer resolution in all three spatial dimensions using simultaneous atomic force/scanning tunneling microscopy measurements performed on the (110) face of rutile TiO2. Oxygen atoms were imaged as protrusions in both data channels, corresponding to a rarely observed imaging mode for this prototypical metal oxide surface. Three-dimensional spectroscopy of interaction forces and tunneling currents was performed on individual surface and subsurface defects as a function of tip-sample distance. An interstitial defect assigned to a subsurface hydrogen atom is found to have a distinct effect on the local density of electronic states on the surface, but no detectable influence on the tip-sample interaction force. Meanwhile, spectroscopic data acquired on an oxygen vacancy highlight the role of the probe tip in chemical reactivity measurements.
Local density of electronic state
Prototypical metal oxide surfaces
Published Version (Please cite this version)https://doi.org/10.1063/1.4942100
Showing items related by title, author, creator and subject.
Transformation of polymer-ZnO core-shell nanofibers into ZnO hollow nanofibers: Intrinsic defect reorganization in ZnO and its influence on the photocatalysis Kayaci, F.; Vempati S.; Ozgit Akgun, C.; Donmez, I.; Bıyıklı, Necmi; Uyar, Tamer (Elsevier, 2015)Photocatalytic activity (PCA) on semiconductors is known to be majorly influenced by specific surface area and intrinsic lattice defects of the catalyst. In this report, we tested the efficiencies of 1D ZnO catalysts of ...
Albayrak, Özlem; Davenport, David (ACM, 2010)Software inspections are effective ways to detect defects early in the development process. In this paper, we analyze the impact of certain defect types on the effectiveness of code inspection. We conducted an experiment ...
X-ray photoelectron spectroscopy for identification of morphological defects and disorders in graphene devices Aydogan, P.; Polat, E. O.; Kocabas, C.; Süzer, Şefik (AIP Publishing, 2016)The progress in the development of graphene devices is promising, and they are now considered as an option for the current Si-based electronics. However, the structural defects in graphene may strongly influence the local ...