Related Experiment Video
Updated: Jul 20, 2026

Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment
Published on: November 9, 2015
Terahertz Modulation of Surface Wettability: Insights from Molecular Dynamics
Kaijie Wu1,2,3, Haige Zhu2, Zhixiang Huang2,3
1Innovation Laboratory of Terahertz Biophysics, National Innovation Institute of Defense Technology, Beijing 100071, China.
None:
Two-dimensional (2D) materials, such as graphene, are of considerable interest due to their wettability properties, which hold significant potential for applications in electronics, optoelectronics, energy storage, and biomedicine. Modulating the interaction between 2D materials and their surrounding fluids is essential for optimizing wettability. In this study, we investigated the effects of terahertz (THz) electromagnetic waves on the surface wettability of graphene. Our results demonstrate that THz waves at 27 THz progressively reduce the contact angle of liquid water droplets on the graphene surface, enhancing hydrophilicity and increasing the time required for the droplets to achieve a stable configuration by 1.5-fold. This phenomenon occurs due to the absorption of electromagnetic energy by the droplets, which alters electrostatic interactions and disrupts the monolayer of water molecules on the graphene surface, thereby influencing the contact angle. This study offers valuable insights into the modulation of surface affinity in two-dimensional materials and highlights the potential for advancing technologies that leverage surface interactions.
More Related Videos
10:28Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
Published on: May 27, 2018
08:49Author Spotlight: Unveiling the Potential of VSFG Microscopy in Studying Mesoscopically Heterogeneous Self-Assembled Structures
Published on: December 1, 2023
Related Concept Videos
Van der Waals Interactions
Intermolecular Forces
Surface Tension, Capillary Action, and Viscosity
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
Surface Tension
Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model
Surface Tension of Fluid
Surface tension varies with...