Characterizing Hydration Properties Based on the Orientational Structure of Interfacial Water Molecules

Area of Science:

• Computational chemistry
• Molecular dynamics
• Biophysics

Background:

• Understanding water at interfaces is crucial for many chemical and biological processes.
• Characterizing molecular structure and dynamics at interfaces presents significant challenges.

Purpose of the Study:

• To present a general computational method for characterizing molecular structure at liquid water interfaces.
• To apply this method for analyzing surface hydrophobicity and protein hydration dynamics.

Main Methods:

• Statistical analysis of orientational configurations of interfacial water molecules from atomistic simulations.
• Generation of position-dependent maps of hydration properties for heterogeneous surfaces.

Main Results:

• The method successfully quantifies interfacial water structure.
• Position-dependent hydration maps reveal surface hydrophobicity.
• Microscopic details of protein hydration shell dynamics are elucidated.

Conclusions:

• The developed method provides a robust approach for characterizing water-liquid interfaces.
• It offers insights into hydration properties and the dynamics of biomolecular hydration shells.