Ionic self-phoresis maps onto correlation-induced self-phoresis

TL;DR

This paper demonstrates that the self-phoresis of ion-releasing particles can be mathematically mapped onto correlation-induced chemophoresis, unifying two phenomena and suggesting experimental avenues for studying diverse motility behaviors.

Contribution

It establishes an analytical connection between ion-based self-phoresis and correlation-induced chemophoresis, extending the theoretical framework and proposing experimental candidates.

Findings

Mapping of ion self-phoresis to CICP in the linear regime

Unification of two phoretic phenomena under a common theoretical framework

Identification of ion-phoretic particles as experimental test cases

Abstract

We re-examine the self-phoresis of a particle that releases(removes) pairs of ions into(from) the electrolyte solution. We show analytically that in the linear regime the mathematical description of this system maps onto that of the correlation-induced (self-)chemophoresis (CICP). This connection provides a unifying perspective of the two phenomena, within which one recovers and extends recent predictions as particular instances of CICP. Conversely, ion-phoretic particles are identified as candidates for experimental investigations into the rich variety of motility patterns predicted by CICP.