Related Experiment Video
Updated: Sep 11, 2025
10:10
Spatiotemporally Controlled Nuclear Translocation of Guests in Living Cells Using Caged Molecular Glues as Photoactivatable Tags
Published on: January 17, 2019
10.6K
Glass transition in colloidal monolayers controlled by light-induced caging.
Abolfazl Ahmadirahmat1, Michele Caraglio1, Vincent Krakoviack2
1Universität Innsbruck, Institut für Theoretische Physik, Technikerstraße 25/2, A-6020 Innsbruck, Austria.
Physical Review. E
|August 19, 2025
Summary
External laser fields can surprisingly melt colloidal glasses or stabilize liquid states in dense suspensions. This study explores how periodic potentials affect the glass transition in quasi-two-dimensional systems.
Area of Science:
- Colloid science
- Condensed matter physics
- Statistical mechanics
Background:
- Colloidal suspensions exhibit glass transitions, a phenomenon typically studied in equilibrium.
- External fields can alter the dynamics and phase behavior of these systems.
Purpose of the Study:
- To theoretically investigate the glass-transition problem in quasi-two-dimensional colloidal dense suspensions.
- To explore the influence of a one-dimensional periodic external potential on the system's nonequilibrium-state diagram.
Main Methods:
- Utilizing a mode-coupling theory approach.
- Analyzing hard disks under density, modulation period, and potential strength variations.
Main Results:
- Observed a nonmonotonic behavior in the glass-transition line due to competing local packing and potential-induced cage distortion.
- Identified regions where external periodic modulation can melt a glass state or stabilize a liquid state.
Conclusions:
- External periodic potentials offer a tunable mechanism to control the phase behavior of colloidal suspensions.
- The interplay between system density and external field characteristics dictates the emergent liquid or glass states.
