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The liquid-glass-jamming transition in disordered ionic nanoemulsions
Marco Braibanti1, Ha Seong Kim2, Nesrin Şenbil1
1Department of Physics, University of Fribourg, 1700, Fribourg, Switzerland.
Scientific Reports
|November 10, 2017
Summary
In colloidal systems, soft interactions blur the lines between glass and jamming transitions. Stiffer interactions, achieved with higher salt concentrations, allow clearer distinction between these critical phenomena.
Area of Science:
- Colloidal science
- Soft matter physics
- Rheology
Background:
- Disordered many-body colloidal systems exhibit distinct glass and jamming transitions.
- Soft repulsive interactions smear these transitions, complicating analysis.
- Understanding the interplay between glass and jamming is crucial for soft matter physics.
Purpose of the Study:
- To investigate droplet dynamics in concentrated silicone oil-in-water nanoemulsions.
- To determine how electrolyte concentration affects the distinction between glass and jamming transitions.
- To explore the role of interfacial interaction stiffness in colloidal system behavior.
Main Methods:
- Utilized light scattering techniques to probe droplet dynamics.
- Studied concentrated silicone oil-in-water nanoemulsions.
- Varied sodium chloride (NaCl) electrolyte concentrations to tune interfacial interactions.
Main Results:
- At low NaCl concentrations, soft and long-range repulsions led to smeared glass and jamming transitions.
- At high NaCl concentrations, stiffer interactions resulted in distinct glass and jamming regimes.
- The system's behavior at high salt concentrations mimicked disordered elastic spheres with sharp interfaces.
Conclusions:
- Electrolyte concentration is a key factor in distinguishing glass and jamming transitions in colloidal systems.
- Stiffer interfacial interactions promote clearer separation between glass and jamming phenomena.
- This study provides insights into controlling and understanding critical transitions in soft matter.
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