{
  "abstract": "We investigate the diffusiophoretic motion of a chemically isotropic active colloid in a three-dimensional wedge formed by two distinct fluid media, in the limit of vanishing Péclet and Reynolds numbers. The concentration field is obtained using the Fourier-Kontorovich-Lebedev transform, yielding an exact representation for arbitrary wedge opening angles and interfacial contrasts. We introduce the interfacial parameter $Γ=(1-λ\\ell)/(1+λ\\ell)$, where $λ$ denotes the diffusivity contrast and $\\ell$ the solute partition coefficient. For $Γ=\\pm1$ and commensurate wedge angles, the solution reduces to finite image constructions, with distinct structures for even and odd commensurability. The general solution also recovers the planar-interface and semi-infinite-interface limits. The leading-order translational phoretic velocity is derived from the concentration field, revealing a strong interplay between wedge geometry and interfacial properties that governs both the magnitude and direction of particle motion. This work provides a framework for understanding and controlling phoretic transport in confined multiphase environments and offer a basis for extensions to finite-size geometries and mixed fluid--fluid and solid boundary conditions. Our results may find applications in the control of active-particle transport in confined multiphase environments, where interfacial properties and geometry can be exploited to tune phoretic motion.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.24566",
  "author_total": 1,
  "authors": [
    {
      "name": "Abdallah Daddi-Moussa-Ider"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/78yt17230x67v.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.24566",
  "fulltext_url": null,
  "id": "78yt17230x67v",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.24566",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.soft"
    ],
    [
      "arxiv",
      "physics.flu-dyn"
    ],
    [
      "openalex",
      "3104|Micro and Nano Robotics"
    ]
  ],
  "openalex": "W7204239801",
  "pdf_url": "https://arxiv.org/pdf/2608.24566",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/78yt17230x67v.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2608.24566",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.24566"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.soft",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.flu-dyn",
      "subfield": "fluid-dynamics"
    }
  ],
  "title": "Phoretic interactions in two-medium wedge geometries",
  "title_text": "Phoretic interactions in two-medium wedge geometries",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/78yt17230x67v",
  "venue": "arXiv",
  "versions": []
}