Surface Oxygen Chemistry of a Gas Sensing Material: SnO2(101)
M Batzill, K Katsiev, Anne M. Chaka, A C. Diebold
Experimental techniques and density functional theory have been employed to identify the surface composition and structure of SnO2(101). The stoichiometric Sn4+O22- surface is only stable at high oxygen chemical potential. For lower oxidizing potential of the gas phase a Sn2+O2- bulk termination is favored. These two surfaces interconvert without reconstruction by occupying and vacating bridging oxygen sites. This variability of the surface composition is possible because of the dual valency of Sn and is fundamental for the application of this material in gas sensing devices.
65 No. 1
Ab initio, DFT, gas sensors, leed, STM, surface science, theory tin oxide
, Katsiev, K.
, Chaka, A.
and Diebold, A.
Surface Oxygen Chemistry of a Gas Sensing Material: SnO<sub>2</sub>(101), Europhysics Letters
(Accessed June 8, 2023)