On application of in situ laser spectroscopic techniques in surface force apparatus

The application of in situ laser spectroscopic techniques in a surface force apparatus represents a novel approach which will provide new knowledge of the molecular behavior in thin filmsbetween solid surfaces. In this feasibility studyfluorescence recovery after photobleaching (FRAP)has been employed to directly measure for the first time the molecular mobility in surfactant monolayers confined between two solid surfaces. The significant potential which laser spectroscopictechniques offer for studies of surface, adhesion, and frictional forces is also briefly discussed.