Dynamic Electrolyte Spreading during Meniscus-Confined Electrodeposition and Electrodissolution of Copper for Surface...

Area of Science:

• Electrochemistry
• Surface Science
• Materials Science

Background:

• Meniscus-confined electrodeposition and electrodissolution offer maskless fabrication of surface patterns and 3D microstructures.
• The solid-liquid interface confined by the meniscus governs the electrochemical reaction zone.

Purpose of the Study:

• To investigate the dynamic spreading of meniscus-confined droplets during electrochemical processes.
• To understand how wetting dynamics are influenced by applied voltage and substrate surface properties.

Main Methods:

• Utilizing meniscus-confined electrodeposition and electrodissolution techniques.
• Examining droplet spreading on both smooth (homogeneous) and superhydrophobic (heterogeneous) surfaces.
• Correlating wetting dynamics with applied voltage and interface characteristics.

Main Results:

• Electrochemical processes induced droplet spreading on smooth surfaces.
• Superhydrophobic surfaces exhibited nonlinear spreading during electrodissolution and spreading inhibition during electrodeposition.
• Wetting dynamics were dependent on applied voltage and surface heterogeneity.

Conclusions:

• Dynamic droplet spreading significantly impacts pattern dimensions in meniscus-confined electrochemical micromachining.
• Electrochemical reactions can induce wetting transitions, providing fundamental insights into interfacial phenomena.