Liquid marbles supported by monodisperse poly(methylsilsesquioxane) particles.

Area of Science:

• Colloid and Surface Science
• Materials Science
• Nanotechnology

Background:

• Model colloidal assemblies are crucial for understanding complex dispersions like emulsions and foams.
• Liquid marbles (water-in-air) lack established methods for creating controlled colloidal structures.
• Poly(methylsilsesquioxane) (PMSQ) particles offer unique properties for stabilizing liquid marbles.

Purpose of the Study:

• To develop a method for preparing well-controlled liquid marbles.
• To investigate the formation of ordered particulate structures within liquid marbles.
• To explore the influence of particle properties and liquid surface energy on structure formation.

Main Methods:

• Utilized monodisperse, micron-size poly(methylsilsesquioxane) (PMSQ) particles.
• Employed a "cleaning process" involving rolling liquid marbles under airflow on a hydrophobic substrate.
• Varied the surface energy of the liquid core of the marbles.

Main Results:

• Achieved formation of liquid marbles with a particulate monolayer structure.
• The monolayer exhibited a hexagonally close-packed (HCP) arrangement due to particle properties.
• High surface energy liquids facilitated monolayer formation, while intermediate surface energies resulted in multilayers.

Conclusions:

• Well-controlled liquid marbles with ordered particulate structures can be prepared using specific particle types like PMSQ.
• The "cleaning process" and liquid surface energy are critical factors in achieving monolayer formation.
• This work provides a foundation for advanced functional colloidal assemblies within liquid marbles.