Evidence for an influence of local dipole excitations in thermal desorption

Luis G Rosa; P A Jacobson; P A Dowben

doi:10.1021/jp054929n

Evidence for an influence of local dipole excitations in thermal desorption

J Phys Chem B. 2006 Apr 20;110(15):7944-50. doi: 10.1021/jp054929n.

Authors

Luis G Rosa¹, P A Jacobson, P A Dowben

Affiliation

¹ Department of Physics and Astronomy, Behlen Laboratory of Physics, Center for Materials Research and Analysis, University of Nebraska-Lincoln, Lincoln, NE 68588-0111, USA.

PMID: 16610893
DOI: 10.1021/jp054929n

Abstract

Ferroelectric crystalline copolymer films of vinylidene fluoride with trifluoroethylene (70%:30%) strongly interact with the dipoles of adsorbed and absorbed water molecules. This interaction can be probed with laser-assisted thermal desorption techniques. The UV light enhancement of water desorption is strongly light polarization dependent. The electronic structure of the ferroelectric copolymer films of vinylidene fluoride with trifluoroethylene films is locally altered with incident UV radiation suggesting metastable excited states that may involve dipole reorientation.