| Issue |
Europhys. Lett.
Volume 65, Number 1, January 2004
|
|
|---|---|---|
| Page(s) | 61 - 67 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2003-10044-0 | |
| Published online | 01 December 2003 | |
Surface oxygen chemistry of a gas-sensing material:
1
Department of Physics, Tulane University - New Orleans, LA 70118, USA
2
Chemical Science and Technology Laboratory, National Institute of Standards Gaithersburg, MD 20899-8380, USA
Corresponding author: diebold@tulane.edu
Received:
29
July
2003
Accepted:
14
October
2003
Experimental techniques and density-functional theory have been
employed to identify the surface composition and structure of
. The stoichiometric 
surface is only stable at high oxygen chemical potential. For
lower oxidizing potential of the gas phase a 
bulk termination is favored. These two surfaces convert into each
other without reconstruction by occupying and vacating bridging
oxygen sites. This variability of the surface composition is
possible because of the dual valency of 
and may be one
of the fundamental mechanisms responsible for the performance of
this material in gas-sensing devices.
PACS: 68.47.Gh – Oxide surfaces / 82.65.+r – Surface and interface chemistry; heterogeneous catalysis at surfaces / 68.37.Ef – Scanning tunneling microscopy (including chemistry induced with STM)
© EDP Sciences, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.