Tools to Probe Nanoscale Surface Phenomena in Cellulose Thin Films: Applications in the Area of Adsorption and Friction - The Nanoscience and Technology of Renewable Biomaterials - page 113

Laser

Photo
Detector

Cantilever F n

Surface

F

Figure4.14 Schematicof lateralforcemicroscopy.

Sample

different material

LFM Image

Sample

LFM Image

Figure 4.15 Lateral deflection of the cantilever from changes in surface friction (top) and
from changes in slope (bottom) (redrawn from http://mechmat.caltech.edu/

∼ kaushik/park/

1-4-0.htm).

effectiveness of a finishing treatment in modifying a specific behavior of the substrate.
LFM has been used extensively to study molecular lubrication phenomena on hard sur-
faces, such as mica, silica, and graphite. Studies on polymer surfaces, relevant to fiber
applications, however, have been limited, primarily due to the fact that polymer sur-
faces deform easily, which adds complexity to the experiment and to the interpretation
of the data.
Lateral force acting on cantilever usually arises from two sources: changes in surface
friction and changes in slope, as illustrated in Figure 4.15. In the first case, since different
materials provide different friction, the cantilever can experience different twisting extent