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Updated: Feb 22, 2026

Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces

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Published on: September 9, 2022

Taming active turbulence with patterned soft interfaces.

P Guillamat^1,2, J Ignés-Mullol^1,2, F Sagués^3,4

¹Department of Materials Science and Physical Chemistry, Universitat de Barcelona, Barcelona, 08028 Catalonia, Spain.

Nature Communications

|September 17, 2017

Summary

This summary is machine-generated.

Active turbulence in tubulin-based gels reveals a single intrinsic length scale governing flow geometry. This scale dictates vortex sizes and laminar flow patterns, offering insights into active matter self-organization.

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Area of Science:

Physics
Biophysics
Soft Matter Physics

Background:

Active matter systems exhibit self-organization and emergent behaviors.
Active nematics, composed of self-driven components, display orientational order and turbulent flow.
Understanding the fundamental length and time scales in active matter is crucial.

Purpose of the Study:

To identify and characterize the governing length scale in active turbulence within a tubulin-based active gel.
To investigate how this length scale influences flow geometry across different regimes.
To explore the role of topological defects in defining active matter length scales.

Main Methods:

Experimental investigation of a quasi-2D layer of tubulin-based active gel.
Analysis of vortex size distribution in active turbulence.
Observation of swirling laminar flows in contact with a lattice of circular domains.

Main Results:

A single intrinsic length scale determines the geometry of active flows.
This length scale is revealed by an exponential distribution of vortex sizes.
The same length scale acts as a cutoff for scale-free power law distributions in laminar flows.

Conclusions:

Active systems possess an intrinsic length scale that governs flow patterns.
Topological defects play a role in establishing this active length scale.
This finding provides a method to probe intrinsic scales in active matter and understand adaptation strategies.