The two files contain raw QCM-D data for adsorption of streptavidin on biotinylated SAM on gold and adsorption of coffee cream on bare gold surface, plots, input for PyQTM, and the output of the fitting to the viscoelastic model performed in PyQTM. These files correspond to Figure 3a,b (streptavidin) and Figure 3b,c (coffee cream), as well as Supplementary Table 1 and Supplementary Table 2 in Johannsmann and Reviakine (2024) Quartz Crystal Microbalance with Dissipation Monitoring for Studying Soft Matter at Interfaces, Nature Methods Protocols Primers.