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3.8 Data processing and analysis
For each single indentation and indentation in a matrix scan, all the load-displacement data is
stored in a tab-separated text file. By using this text file, the load-displacement data can be
imported in any program for post-processing. Also, the Piuma Dataviewer program can be used to
quickly load all data and make small adjustments where necessary.
For each matrix scan a tab-
separated text file is saved with a matrix of the Effective Young’s
Modulus per coordinate. This allows one to quickly recreate the Young’s Modulus map in any other
software program. Additionally, per indentation a separate text file is saved that contains all
information for this indentation. The header of the file contains the absolute coordinates, the
automatically defined surface position, the probe parameters used, the calibration factor applied,
the displacement profile used and some variables that are extracted from the load-displacement
curve, such as maximum load (P
max
), maximum displacement (D
max
) and (Eff.) Young’s Modulus.
Figure 26: Typical indentation file showing the 37 header lines and the start of the five data columns describing the
indentation curve.