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 SS+BI-TuM

Invited Paper SS+BI-TuM7
Two-dimensional Phase Diagram of Decanethiol on Au (111)

Tuesday, October 30, 2001, 10:20 am, Room 120

Session: Poirier Memorial Session: Self-Assembled Monolayers I
Presenter: J.M. White, The University of Texas at Austin
Authors: J.M. White, The University of Texas at Austin
W.P. Fitts, The University of Texas at Austin
Correspondent: Click to Email
Based on variable temperature ultrahigh vacuum scanning tunneling microscopy data, we propose a two-dimensional phase diagram of monolayer decanethiol on Au(111). Four triple point temperatures were determined: T@sub1@ at ~ 27 @degree@C, T@sub 2@ at ~ 33 @degree@C, T@sub3@ at ~ 35 @degree@C and T@sub 4@ ~ 56@degree C. T@sub 1@ defines the lowest temperature melting point and T@sub 4@ defines the temperature above which striped phases are metastable. These data provide a fundamental framework to understand and control meso-scale monolayer structure; moreover, they provide fundamental insight into two dimensional phase behavior of molecules with many degrees-of-freedom.