Contact Mode

Topography and roughness can be characterized by monitoring the vertical excursion of the cantilever in contact with the surface. Assigning a deflection signal in z-direction to each point while scanning leads to the image. Two typical examples, one of a biological and one of a biomaterial surface, are shown in Figure 4 respectively in Figure 5a. Roughness can be calculated from the acquired data.

Figure 4. Typical contact mode SFM image of human enamel showing different crystals. Unpublished data with kind permission from M. Hannig, Clinic for Dentistry, Stomatology, and Oral Maxillo-Facial Surgery, Saarland University.
0 0

Post a comment