| Issue |
EPL
Volume 152, Number 6, December 2025
|
|
|---|---|---|
| Article Number | 67001 | |
| Number of page(s) | 7 | |
| Section | Biological and soft matter physics | |
| DOI | https://doi.org/10.1209/0295-5075/ae2d8f | |
| Published online | 29 December 2025 | |
Ionic self-phoresis maps onto correlation-induced self-phoresis
1 Física Teórica, Universidad de Sevilla - Apdo. 1065, 41080 Sevilla, Spain
2 Instituto Carlos I de Física Teórica y Computacional - 18071 Granada, Spain
3 International Centre of Biodynamics, 1B Intrarea Portocalelor - 060101 Bucharest, Romania
Received: 8 September 2025
Accepted: 16 December 2025
Abstract
The recently identified mechanism of correlation-induced (self-)chemophoresis highlights that the motion of a catalytically active particle in response to chemical gradients generated by the activity involves a significant activity-dependent response that lies beyond linear-response theory. Here we address the experimentally relevant case of “ionic self-phoresis”, occurring when the particle exchanges ions with an ambient electrolyte solution, and show that this novel conceptual framework provides a unifying perspective within which recent predictions are recovered and extended as particular instances of the correlation-induced mechanism. Conversely, ion-phoretic particles are identified as candidates for experimental investigations into the rich variety of motility patterns predicted by the correlation-induced (self-)phoresis.
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