Related Experiment Video
Updated: Apr 7, 2026
12:37
Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers
Published on: September 4, 2015
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Observation of phase correlations in ferrofluids.
Alessandro Chiolerio1,2, 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
Researchers observed synchronized behavior between two separated ferrofluids (magnetic fluids). Even when shielded and meters apart, one ferrofluid
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.
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