The description of PhaseImaging

Phase imaging is a secondary imaging mode derived from TappingMode that goes beyond topographical data to detect variations in composition, adhesion, friction, viscoelasticity, and other properties, including electric and magnetic. Applications include contaminant identification, mapping of components in composite materials, differentiating regions of high and low surface adhesion or hardness and regions of different electrical or magnetic properties.

Phase imaging is the mapping of the phase lag between the periodic signal that drives the cantilever and the oscillations of the cantilever. Changes in the phase lag often indicate changes in the properties of the sample surface.

 

Examples (click to enlarge)


Topography.

Phase imaging.
Different properties of the components of composite as well as grains are visible. Scan size 3x3um.

Topography.

Phase imaging.
DVD-R - disc before burning process. Scan size 5x5um.

Topography.

Phase imaging.
DVD-R - disc after burning process. Scan size 5x5um.

Topography.

Phase imaging.
Alkane deposited on graphite substrate. Scan size 650x650nm.

Topography.

Phase imaging.
Biological sample. Scan size 3x3um. The cell boundaries are visible as well as certain area which differs significantly in matter of viscoelasticity properties of the surface.


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