Structural Arrest and Phase Transition in Glassy Nanocellulose Colloids

Area of Science:

• Soft Matter Physics
• Materials Science
• Colloid Science

Background:

• Colloidal glasses are common soft materials formed from particle networks and solvents.
• Existing colloidal glasses typically feature random particle packing.

Purpose of the Study:

• To develop a new type of colloidal glass with high liquid crystalline order.
• To investigate the simultaneous occurrence of structural arrest and phase transition during glass formation.

Main Methods:

• Dispersing charged rod-like cellulose nanoparticles in a water-ethylene glycol cosolvent.
• Observing the formation of glassy phases and liquid crystalline superstructures.

Main Results:

• Demonstrated a novel colloidal glass preserving nematic and cholesteric packing states.
• Observed simultaneous structural arrest and phase transition at high particle concentrations.
• Identified particle caging via long-ranged repulsive interactions as key to the frozen liquid crystal texture.

Conclusions:

• A new colloidal glass with inherent liquid crystalline order has been successfully synthesized.
• The study reveals simultaneous structural arrest and phase transition in this system.
• The findings highlight the role of inter-particle interactions in forming ordered colloidal glasses.