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Authors Seuss, M. ; Fery, A.
Title AFM Force Curve Analyzer for IgorPRO
Date 27.03.2018
Number 55295
Abstract An Igor Pro toolkit to process and evaluate Atomic Force Microscopy Force-Distance Measurements, in particular for hydrogel and polymer mechanics and adhesion, capsule mechanics and polymer brush interactions. <br /><br />General information:<br />All code is commented to ease understanding the tasks and ideas behind commands used.<br />This software processes raw detector deflection signals in voltage vs raw piezo movement waves in meter. Therefore, it is suitable for measurements collected at any atomic force microscope, provided the data is importable to Igor Pro. No header-information from waves are used. Only name style of the measurements must follow the principles of Asylum Research.(everything is explained in XXX)<br />The procedure first indexes all force-distance curves in a specified Igor Pro Folder. All curves can be processed and visualizied in graph indiviually or all at once.<br />All systems constants like cantilever spring constant, sensitivity, probe radius etc. are requested by user input.<br />General processing features include: determination of baseline tilt angle and its correction to be flat; "easy" calculation of the adhesion force (lowest force value while retracting); determination of the contact point: 5 different algorithm adjustable through different input values; conversion from raw deflection and piezo movement to force versus deformation/separation<br />Specialized features:<br />Calculation of advanced adhesion properties based on JKR and DMT theory for different contact geometries. Determination of load and dissipated energy.<br />Mechanical interpretation of force-deformation curves: available contact mechanics theorys are Hertz-Model, regular Johnson-Kendal-Roberts theory, 2 point Johnson-Kendal-Roberts theory, Derjaguin-Muller-Toporov theory, Reissner theory for thin-shell capsuls, Maugis-Dugdale theory in the approximation of Carprick and others. This mechanics panel supports a great varity of adjustable variables to adjust the fitting algorithm to experimental data in regard to size, geometry, fitting ranges and many others.<br />Fitting panels for polymer brush measurements based on a mean-field theory and the Alexander deGennes model.<br />Additionally, further smaller scripts are available for other kind of interaction forces, BUT they are not yet perfected since they were not used to same excess as the ones mentioned above.
Publisher Zenodo GitHub
Wikidata
Citation Zenodo GitHub (2018) https://zenodo.org/record/1208549#.WvmJfn_J1aQ
DOI https://doi.org/10.5281/zenodo.1208549
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