Three-dimensional interaction force and tunneling current spectroscopy of point defects on rutile TiO2(110)
Abstract
Here, 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.
- Authors:
-
- Yale Univ., New Haven, CT (United States); Bilkent Univ., Ankara (Turkey)
- Yale Univ., New Haven, CT (United States); Univ. of Munster, Munster (Germany)
- Yale Univ., New Haven, CT (United States); Southern Connecticut State Univ., New Haven, CT (United States)
- Yale Univ., New Haven, CT (United States); Yasar Univ., Izmir (Turkey)
- Yale Univ., New Haven, CT (United States)
- Publication Date:
- Research Org.:
- Yale Univ., New Haven, CT (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1469684
- Alternate Identifier(s):
- OSTI ID: 1238076
- Grant/Contract Number:
- FG02-06ER15834
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 108; Journal Issue: 7; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Baykara, Mehmet Z., Mönig, Harry, Schwendemann, Todd C., Ünverdi, Özhan, Altman, Eric I., and Schwarz, Udo D. Three-dimensional interaction force and tunneling current spectroscopy of point defects on rutile TiO2(110). United States: N. p., 2016.
Web. doi:10.1063/1.4942100.
Baykara, Mehmet Z., Mönig, Harry, Schwendemann, Todd C., Ünverdi, Özhan, Altman, Eric I., & Schwarz, Udo D. Three-dimensional interaction force and tunneling current spectroscopy of point defects on rutile TiO2(110). United States. https://doi.org/10.1063/1.4942100
Baykara, Mehmet Z., Mönig, Harry, Schwendemann, Todd C., Ünverdi, Özhan, Altman, Eric I., and Schwarz, Udo D. Mon .
"Three-dimensional interaction force and tunneling current spectroscopy of point defects on rutile TiO2(110)". United States. https://doi.org/10.1063/1.4942100. https://www.osti.gov/servlets/purl/1469684.
@article{osti_1469684,
title = {Three-dimensional interaction force and tunneling current spectroscopy of point defects on rutile TiO2(110)},
author = {Baykara, Mehmet Z. and Mönig, Harry and Schwendemann, Todd C. and Ünverdi, Özhan and Altman, Eric I. and Schwarz, Udo D.},
abstractNote = {Here, 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.},
doi = {10.1063/1.4942100},
journal = {Applied Physics Letters},
number = 7,
volume = 108,
place = {United States},
year = {Mon Feb 15 00:00:00 EST 2016},
month = {Mon Feb 15 00:00:00 EST 2016}
}
Web of Science
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