Nanodroplets wetting an elastic half-space

Area of Science:

• Interface science
• Soft matter physics
• Surface science

Background:

• Wetting of deformable surfaces is complex and debated.
• Classical models lack insight into nanophysics and surface force effects on wetting ridges.
• Understanding nanoscale wetting is crucial for soft materials.

Purpose of the Study:

• Investigate the role of surface forces in nanoscale droplet deformation on elastic surfaces.
• Analyze the statics and dynamics of wetting ridges using the disjoining pressure concept.
• Determine how surface forces influence wetting ridge geometry and evolution.

Main Methods:

• Utilized the disjoining pressure concept for theoretical analysis.
• Studied nanoscale droplets on infinitely thick, elastic surfaces.
• Examined both static and dynamic aspects of wetting ridge formation.

Main Results:

• Wetting ridge tip geometry is demonstrably dependent on surface forces.
• Non-monotonic changes in maximal height and solid angle observed over time.
• Droplet size relative to surface force range significantly affects wetting ridge evolution.

Conclusions:

• Surface forces play a critical role in shaping nanoscale wetting ridges.
• The disjoining pressure model provides new insights into soft wetting phenomena.
• Dynamic evolution of wetting ridges is complex and influenced by surface interactions.