AVS 58th Annual International Symposium and Exhibition
    Surface Science Division Thursday Sessions
       Session SS-ThA

Paper SS-ThA4
Polarization Dependent Interactions at Ferroelectric Surfaces

Thursday, November 3, 2011, 3:00 pm, Room 107

Session: Semiconducting & Ferroelectric Surface
Presenter: John Vohs, University of Pennsylvania
Authors: J. Garra, University of Pennsylvania
M. Zhao, University of Pennsylvania
J.M. Vohs, University of Pennsylvania
E.H. Morales, University of Pennsylvania
D.A. Bonnell, University of Pennsylvania
Correspondent: Click to Email
Ferroelectric polarization at surfaces has been exploited over the last several years to mediate reactions in aqueous solutions. More recently studies have shown that ferroelectric polarization at surfaces affects molecular adsorption. The study presented here uses a variety of surface techniques (scanning tunneling microscopy and spectroscopy, low energy electron diffraction, temperature programmed desorption) to examine molecular adsorption on ferroelectric surfaces. Various molecules and various substrates are chosen to determine the effect of polarization orientation and magnitude on physisorption, disassociative chemisorption, defect mediated adsorption and chemical reactions. Specifically, results of interactions of small molecules on LiNbO3, and BaTiO3 surfaces will be compared. We show that ferroelectric polarization can affect both physisorption and chemisorption bond energies as well as the sticking coefficients.