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Related Experiment Video

Updated: Jun 14, 2026

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Published on: November 21, 2013

Self-organized patterns in collections of chains.

T Sykes¹, T Mullin

¹Manchester Centre for Nonlinear Dynamics, The University of Manchester, Manchester M13 9PL, United Kingdom.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|April 7, 2010

Summary

This study reveals critical phenomena and phase transitions in vibrated granular mixtures of poppy seeds and metal chains. Similarities to phase separation in complex fluid mixtures are observed.

Area of Science:

Physics
Materials Science
Complex Systems

Background:

Granular materials exhibit complex behaviors under external stimuli.
Phase separation is a fundamental phenomenon in diverse physical systems.

Purpose of the Study:

To investigate patterned segregation in vibrated granular mixtures.
To identify critical phenomena and phase transitions.
To compare granular system behavior with fluid mixture phase separation.

Main Methods:

Experimental investigation of thin layers of poppy seeds and metal chains.
Application of controlled vibration.
Mapping of a phase diagram.

Main Results:

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Observation of both continuous and discontinuous transitions.

Identification of a tricritical point separating hysteretic and continuous segregation.

Discovery of similarities between driven granular systems and phase separation in multi-component fluids.

Conclusions:

Vibrated granular systems display critical phenomena analogous to phase separation in other complex systems.
The identified tricritical point is crucial for understanding segregation dynamics.
This research bridges the study of granular matter and soft condensed matter physics.