{
  "abstract": "We report measurements of the surface tension of aqueous sodium dodecyl sulfate solutions at sixteen concentrations from 0.17 to 43$\\,$mM, spanning 0.02 to 5 times the room-temperature critical micelle concentration (cmc), and at temperatures from 26 to 83$\\,$$^\\circ{\\rm C}$, using the Wilhelmy plate method. At the lowest concentration the surface tension decreases with temperature, as it does for pure water. Above about 0.4$\\,$mM, however, it increases: the temperature coefficient changes sign at a concentration of 0.3 to 0.8$\\,$mM, roughly a tenth of the cmc, and reaches $+0.53\\,\\rm mN\\,m^{-1}\\,K^{-1}$ near 3$\\,$mM, three times the magnitude of that of pure water and of the opposite sign. Above the cmc the surface tension is nearly independent of temperature, saturating at $35.2\\pm0.3\\,\\rm mN\\,m^{-1}$. The behavior cannot be attributed to the temperature dependence of the cmc, which is an order of magnitude too weak. It is instead consistent with a surfactant layer that thins as the temperature rises. The results imply that the sign and magnitude of thermocapillary stresses in SDS solutions can be selected through the concentration.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.00532",
  "author_total": 2,
  "authors": [
    {
      "name": "Jong Cheon Lee"
    },
    {
      "name": "Ildoo Kim"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8dvh34w0fm0xp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.00532",
  "fulltext_url": null,
  "id": "8dvh34w0fm0xp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.00532",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.soft"
    ],
    [
      "arxiv",
      "physics.flu-dyn"
    ],
    [
      "openalex",
      "1605|Surfactants and Colloidal Systems"
    ]
  ],
  "openalex": "W7215895642",
  "pdf_url": "https://arxiv.org/pdf/2610.00532",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8dvh34w0fm0xp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:03Z",
      "native_id": "2610.00532",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.00532"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.soft",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.flu-dyn",
      "subfield": "fluid-dynamics"
    }
  ],
  "title": "Temperature dependence of surface tension in aqueous sodium dodecyl sulfate solutions",
  "title_text": "Temperature dependence of surface tension in aqueous sodium dodecyl sulfate solutions",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:03Z",
  "url": "https://research.draconitic.com/paper/8dvh34w0fm0xp",
  "venue": "arXiv",
  "versions": []
}