Quantitative characterization of nanoadhesion by dynamic force spectroscopy
[ 1 ] Instytut Fizyki, Wydział Fizyki Technicznej, Politechnika Poznańska | [ P ] pracownik
2009
artykuł naukowy
angielski
- cell physiology
- force spectroscopy
- kinetics
- surface interactions
- theoretical models
EN We present a method for the characterization of adhesive bonds formed in nanocontacts. Using a modified atomic force microscope, the nanoadhesion between a silicon nitride tip and a self-assembled monolayer of 1-nonanethiol on gold(111) was measured at different loading rates. Adhesion force-versus-loading rate curves could be fitted with two logarithmic terms, indicating a two step (two energy barrier) process. The application of the Bell-Evans model and classical contact mechanics allows the extraction of quantitative information about the effective adhesion potential and characterization of the different components contributing to nanoadhesion.
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