AVS 51st International Symposium
    Surface Science Wednesday Sessions
       Session SS1-WeM

Paper SS1-WeM11
Effect of Polarization on Reactivity of BaTiO@sub 3@ (100)}

Wednesday, November 17, 2004, 11:40 am, Room 210B

Session: Metal Oxides and Clusters I: Formation and Structure
Presenter: J. Garra, The University of Pennsylvania
Authors: J. Garra, The University of Pennsylvania
B. Halevi, The University of Pennsylvania
J. Vohs, The University of Pennsylvania
D.A. Bonnell, The University of Pennsylvania
Correspondent: email address not available
Surface reactivity of ferroelectric compounds is an important component of a new approach to nano lithography, may be an interesting catalytic support, and is indicated in ferroelectric memory failure. In order to examine the relationship between atomic polarization and surface adsorption, reactions with single crystal BaTiO@sub 3@ (100) were characterized by temperature programmed desorption, x-ray photo emission spectroscopy, scanning surface potentiometry, and piezo response force microscopy. Similar to the case of other perovskite oxides, water does not adsorb at room temperature or above unless the surface contains a high density of defects. Adsorption of CO2 on BaTiO3 is more complex than on SrTiO@sub 3@. The domain orientation dependence of these reactions will be discussed in the context of proposed reaction mechanisms.