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Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
Published on: May 20, 2014
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Activity-modulated phase transition in a two-dimensional mixture of active and passive colloids
Mohammed Elismaili1, Samah Hamze1, Hong Xu1
1Université de Lorraine, LCP-A2MC, F-57000, Metz, France.
The European Physical Journal. E, Soft Matter
|March 7, 2020
Summary
Active colloids soften and melt binary mixtures more than expected, especially with larger temperature differences. This research aids hybrid aggregate studies for biomedical applications.
Area of Science:
- Soft matter physics
- Colloidal science
- Computational materials science
Background:
- Hybrid aggregates combine living cells and inert particles, mimicking biological systems.
- Understanding their behavior is crucial for applications in biomedicine and materials science.
- Active and passive colloids offer a simplified model for such complex systems.
Purpose of the Study:
- To investigate the effects of active and passive colloids on mixture properties.
- To analyze system behavior under varying effective temperatures using molecular dynamics.
- To characterize density, structure, and thermoelastic properties of the binary mixture.
Main Methods:
- Two-dimensional molecular dynamics simulations.
- Utilized two distinct thermostats to control effective temperatures.
- Systematically varied temperature parameters to observe changes in mixture behavior.
Main Results:
- Active colloids promote a shift towards a liquid state and increase deformability.
- Softer, melting effects are amplified beyond linear temperature combinations.
- Homogeneity is maintained at moderate activity; segregation occurs at high temperature differences.
Conclusions:
- Active particle concentration and temperature differentials significantly influence hybrid aggregate properties.
- Findings provide a foundation for designing and controlling experimental hybrid aggregates.
- Potential applications in biomedicine can be advanced through this understanding.
Keywords:
Flowing Matter: Active Fluids
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