Ptak A1, Kappl M, Moreno-Flores S, Gojzewski H, Butt HJ.
Langmuir. 2009 Jan 6;25(1):256-61. doi: 10.1021/la8028676.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. Read More