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Related Experiment Video

Updated: Apr 7, 2026

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

Published on: September 4, 2015

Observation of phase correlations in ferrofluids.

Alessandro Chiolerio^1,2, Giuseppe Vitiello³, Mohammad Mahdi Dehshibi⁴

¹Bioinspired Soft Robotics, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy. alessandro.chiolerio@iit.it.

Scientific Reports

|April 5, 2026

Summary

This summary is machine-generated.

Researchers observed synchronized behavior between two separated ferrofluids (magnetic fluids). Even when shielded and meters apart, one ferrofluid

Keywords:

Coherent states Colloidal entanglement Ferrofluid Learning Microwave impedance spectroscopy

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Area of Science:

Colloidal Science
Soft Matter Physics
Materials Science

Background:

Ferrofluids, or magnetic fluids, are crucial in soft robotics and biomedicine.
Understanding collective phenomena in ferrofluids is key to advancing these fields.
Previous research has not explored long-range correlations in isolated ferrofluid volumes.

Purpose of the Study:

To investigate potential phase correlations between physically separated ferrofluid volumes.
To determine if a coherent state can be induced and maintained in isolated ferrofluids.
To explore the nature of interactions in ferrofluids beyond classical electromagnetic forces.

Main Methods:

Inducing a coherent state in ferrofluids via a 'twinning' pre-conditioning process with hysteresis cycles.
Separating the ferrofluid into two electromagnetically shielded volumes.
Applying an electrical stimulus to one volume and monitoring impedance fluctuations in both.

Main Results:

Statistically significant correlations in impedance fluctuations were observed between stimulated and non-stimulated ferrofluid samples.
Correlations persisted up to 10 meters separation and for approximately 100 hours.
Results were consistent across water-based and hydrocarbon-based ferrofluids (10-50 °C), excluding classical electromagnetic mediation.

Conclusions:

Ferrofluids exhibit a long-range, collective phenomenon not explained by classical electromagnetic interactions.
This discovery opens new research avenues for complex interactions in colloidal systems.
Potential applications in advanced materials and remote sensing may be explored.