AVS 45th International Symposium
    Nanometer-scale Science and Technology Division Monday Sessions
       Session NS+SS-MoM

Paper NS+SS-MoM7
Tribology and Mechanical Properties of Langmuir-Blodgett Monolayers

Monday, November 2, 1998, 10:20 am, Room 321/322/323

Session: Tribology, Adhesion and Interfacial Forces
Presenter: K.J. Wahl, Naval Research Laboratory
Authors: K.J. Wahl, Naval Research Laboratory
W.R. Barger, Naval Research Laboratory
S. Asif, Naval Research Laboratory
Correspondent: Click to Email
Mechanical properties of contacts with nanometer-scale dimensions are important in understanding the behavior of microscale sliding contacts. Monolayer films provide a model system to study fundamentals of relationships between adhesion, friction and mechanics. In this study, we deposited monolayers of distearoyl phosphatidyl ethanolamine (DSPE) and dioleoyl phosphatidyl ethanolamine (DOPE) (both mixed and single component) on freshly cleaved mica by the Langmuir-Blodgett technique. We use atomic force microscopy to examine morphology, adhesion and shear (sliding) behavior as well as modulation techniques to investigate mechanical properties of the monolayers as a function of deposition pressure. Measurements of film elastic/viscoelastic mechanical response via force modulation techniques are compared and contrasted with the surface compressional modulus determined during film deposition as well as to mechanical properties via nanoindentation.