Size-Dependent Contact Angles of Microscopic Droplets on Ultra-Smooth Silanized Surfaces Probed by Atomic Force Microscopy

This dataset contains the raw and processed results from atomic force microscopy (AFM) investigations of microscopic droplets on engineered solid substrates. The data were generated in the context of a study on wetting, dewetting, and contact angle determination at the nanoscale, focusing on the interplay between liquid properties and surface chemistry. Three different liquid categories were systematically investigated on various substrates that are fully characterized in the corresponding research paper. The dataset includes: Droplet AFM profiles: CSV files of two-dimensional droplet cross-sections obtained from AFM scans, enabling direct visualization of the liquid–solid interface and droplet curvature. Contact angle values: Extracted from AFM profiles, reported as the final measured contact angle for each droplet. Substrate information: Each file is linked to the substrate type (hydrophilic, hydrophobic, or hybrid coatings), which is discussed in detail in the publication. Python analysis code: Scripts for reproducing the figures and numerical results reported in the paper. The code allows re-plotting of droplet profiles, recalculation of contact angles, and comparison across liquids and substrates. The dataset is intended to provide both reproducibility of the results presented in the paper and a resource for further methodological development. Researchers can reuse the raw droplet profiles to test alternative fitting routines, compare with theoretical models, or extend the analysis to other wetting systems. All files are provided in open formats (CSV for numerical data, Python scripts in .py) to ensure accessibility. File naming conventions indicate the liquid type, substrate, and replicate number. Together, the data and code establish a complete workflow from AFM measurement to quantitative contact angle extraction. This dataset is directly relevant to the fields of surface science, interfacial physics, coating technology, and micro/nanoscale wetting phenomena, and may be of interest to both experimentalists and modelers investigating droplet behavior on functional surfaces.