Scanning tunneling microscopy and tunneling spectroscopy of the n-TiO sub 2 (001) surface
Abstract
The (001) surface of a highly doped ({approximately} 10{sup 19} cm{sup {minus}3}) n-type TiO{sub 2} crystal, following polishing, wet etching, and cleaning, was imaged in air with a Pt-Ir tip with a scanning tunneling microscope (STM). Good images of the surface could be obtained with the sample held at negative voltage (positive tip bias), with the high-resolution image showing only Ti atoms. Tunneling spectroscopy, involving the recording of i-V curves and dynamic conductance (di/dV)-V curves with the tip held over a given spot on the TiO{sub 2} surface, was also carried out. The resulting curves show electron tunneling into the conduction band and from the valence band, as well as a prominent peak identified as a surface state about 0.3 eV below the conduction band edge.
- Authors:
-
- Univ. of Texas, Austin (USA)
- Publication Date:
- OSTI Identifier:
- 6336135
- Resource Type:
- Journal Article
- Journal Name:
- Journal of Physical Chemistry; (USA)
- Additional Journal Information:
- Journal Volume: 94:9; Journal ID: ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; TITANIUM OXIDES; SPECTROSCOPY; SURFACE PROPERTIES; DATA ANALYSIS; DOPED MATERIALS; EXPERIMENTAL DATA; MEASURING INSTRUMENTS; MEASURING METHODS; CHALCOGENIDES; DATA; INFORMATION; MATERIALS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 360202* - Ceramics, Cermets, & Refractories- Structure & Phase Studies
Citation Formats
Fan, F F, and Bard, A J. Scanning tunneling microscopy and tunneling spectroscopy of the n-TiO sub 2 (001) surface. United States: N. p., 1990.
Web. doi:10.1021/j100372a075.
Fan, F F, & Bard, A J. Scanning tunneling microscopy and tunneling spectroscopy of the n-TiO sub 2 (001) surface. United States. https://doi.org/10.1021/j100372a075
Fan, F F, and Bard, A J. 1990.
"Scanning tunneling microscopy and tunneling spectroscopy of the n-TiO sub 2 (001) surface". United States. https://doi.org/10.1021/j100372a075.
@article{osti_6336135,
title = {Scanning tunneling microscopy and tunneling spectroscopy of the n-TiO sub 2 (001) surface},
author = {Fan, F F and Bard, A J},
abstractNote = {The (001) surface of a highly doped ({approximately} 10{sup 19} cm{sup {minus}3}) n-type TiO{sub 2} crystal, following polishing, wet etching, and cleaning, was imaged in air with a Pt-Ir tip with a scanning tunneling microscope (STM). Good images of the surface could be obtained with the sample held at negative voltage (positive tip bias), with the high-resolution image showing only Ti atoms. Tunneling spectroscopy, involving the recording of i-V curves and dynamic conductance (di/dV)-V curves with the tip held over a given spot on the TiO{sub 2} surface, was also carried out. The resulting curves show electron tunneling into the conduction band and from the valence band, as well as a prominent peak identified as a surface state about 0.3 eV below the conduction band edge.},
doi = {10.1021/j100372a075},
url = {https://www.osti.gov/biblio/6336135},
journal = {Journal of Physical Chemistry; (USA)},
issn = {0022-3654},
number = ,
volume = 94:9,
place = {United States},
year = {Thu May 03 00:00:00 EDT 1990},
month = {Thu May 03 00:00:00 EDT 1990}
}