Welcome to the Carpick Lab's software toolbox!

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Analyzing NanoScope files with MatLab

This page provides free access to the analysis tools developed by the Carpick group at the University of Pennsylvania. Among the tools available here are instructions for gathering friction versus load (FvL) data from a DI NanoScope (III or IV) AFM, MatLab scripts for analyzing FvL and adhesion data, and directions for the use of these scripts. Please read carefully the headers in each of the scripts and the directions in the manual provided below:

Processing a NanoScope file

The following scripts handle DI data files as described in the manual. You will need 'get_image_data,' 'di_version,' 'di_header_find,' and 'extract_num' to read DI data into a MatLab array. The two files 'nano3read' and 'getparameter' are the original copyrighted source code for each of the files as indicated.

• get_image_data
• di_header_find
• di_version
• extract_num
• nano3read (original source code for get_image_data)
• getparameter (orig. code for di_header_find and extract_num)

Calculating Friction vs Load

The most important script to analyze your FvL data is 'friction_v_load.' To process large batches of data, use 'batch_process' (see the manual). File 'latcal' is a Mathcad file that uses the output of the Lateral Calibration function of 'friction_v_load' to find the ratio between normal and lateral calibration factors.

• friction_v_load
• batch_process
• latcal

Measuring Pull-Off Forces

The following files are applicable to force-distance data files only. The output of 'getfd' is the pull-off force in volts and the slope of the contact region of a force curve (normal signal deflection sensitivity in volts per nm). Update April 7, 2005: batchfd no longer requires getfd to run (or commenting/uncommenting of getfd).

• getfd
• batchfd

For your convenience, all Matlab and Mathcad files are zipped here: SWfiles