Liquid crystal elastomer-based reversible metamorphosis for loss-less droplet manipulation.

Area of Science:

• Materials Science
• Polymer Science
• Surface Science

Background:

• Liquid crystal elastomers (LCEs) exhibit reversible shape transformation in response to stimuli.
• Superhydrophobic surfaces repel high surface tension liquids, but superomniphobic surfaces repel both high and low surface tension liquids.
• Combining LCE metamorphosis with superomniphobicity remains an unexplored area.

Purpose of the Study:

• To develop novel liquid crystal elastomer (LCE)-based superomniphobic surfaces.
• To integrate reversible metamorphosis with superomniphobicity in LCE surfaces.
• To demonstrate the utility of these surfaces in liquid manipulation.

Main Methods:

• Laser texturing of LCE surfaces.
• Low surface energy modification of textured LCE surfaces.
• Characterization of surface repellency and metamorphic properties.

Main Results:

• Successfully created LCE-based superomniphobic surfaces with extreme repellence to aqueous and organic liquids.
• Demonstrated reversible metamorphosis of these surfaces due to the nematic-isotropic transition of LCE.
• Achieved lossless manipulation of liquid droplets, including merging, mixing, and microfluidic gating.

Conclusions:

• Developed LCE-based superomniphobic surfaces with reversible metamorphosis.
• These surfaces enable advanced liquid handling and microfluidic control.
• Potential applications include microfluidic reactors, lab-on-chip devices, and adaptive liquid-handling systems.