IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Surface Science Tuesday Sessions
       Session SS2-TuM

Paper SS2-TuM6
Crystallization Kinetics of Amorphous Solid Water on Hydrophobic and Hydrophilic Substrates

Tuesday, October 30, 2001, 10:00 am, Room 122

Session: Water at Surfaces
Presenter: G. Teeter, Pacific Northwest National Laboratory
Authors: G. Teeter, Pacific Northwest National Laboratory
Z. Dohnalek, Pacific Northwest National Laboratory
R.S. Smith, Pacific Northwest National Laboratory
G.A. Kimmel, Pacific Northwest National Laboratory
B.D. Kay, Pacific Northwest National Laboratory
Correspondent: Click to Email
The crystallization kinetics of thin film (5-200 BL) Amorphous Solid Water (ASW) has been studied using Temperature Programmed Desorption (TPD) and Fourier Transform Infrared Spectroscopy (FTIR). ASW thin films were deposited by molecular beam on clean, w ell-ordered Pt(111) and decane (C@sub 10@H@sub 22@) thin film substrates in order to probe the dependence of H@sub 2@O crystallization kinetics on substrate-H@sub 2@O interactions. H@sub 2@O wets the Pt(111) surface and is non-wetting on the decane substr ate. In both cases crystallization of the ASW thin film proceeds via nucleation and 3D growth of the crystalline phase. As-deposited ASW kinetically wets the decane substrate at low temperature, but TPD and FTIR results indicate that crystallization is accompanied by de-wetting the H@sub 2@O film from the decane substrate. Details of the experimental techniques, results, and implications will be presented.t. @FootnoteText@ Pacific Northwest National Laboratory is a multiprogram National Laboratory operated for the U.S. Department of Energy by Battelle Memorial Institute under contract DE-AC06-76RLO 1830. a.