{
  "abstract": "We report impact-induced water-droplet rebound on a nanoscopically smooth phenyl-silica surface bearing an oleic-acid liquid layer with a nominal cast-equivalent thickness of ≈1 µm, retained on the substrate through interactions previously attributed to COOH–π association. High-speed imaging (5000 fps) of 10 µL water droplets resolves complete rebound at all sampled conditions from Weber number (𝑊𝑒) = 0.69 to 3.99 and partial rebound with satellite ejection at 𝑊𝑒 = 6.03 and 7.14; a near-zero-impact reference showed no liftoff during the recorded interval. The apex-based rebound proxy (𝑒apex) varied nonmonotonically, reaching 0.72 ± 0.02, whereas the apparent residence time of 16–21 ms showed no systematic dependence on 𝑊𝑒 and remained close to the inertial-capillary timescale. These kinematics are comparable to rebound regimes reported for smooth solids and liquid interfaces. Entrained-gas-film dynamics and the response of the oleic-acid layer are discussed as mechanistic hypotheses, while neither gas-film continuity nor lubricant redistribution was directly resolved. The results establish rapid impact-induced water shedding on a smooth, texture-free oleic-acid-coated interface and motivate future tests of lubricant retention under repeated water impact.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Mechanical Engineering, Yokohama National University, Tokiwadai 79-5, Hodogaya-Ku, Yokohama, Kanagawa, Japan, 240-8501",
    "Core Electronics Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST, Higashi 1-1-1, Tsukuba, Ibaraki, Japan, 305-8565",
    "Graduate School of Engineering Science, Yokohama National University, Tokiwadai 79-5, Hodogaya-Ku, Yokohama, Kanagawa, Japan, 240-8501"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Dai Watanabe"
    },
    {
      "affs": [
        0
      ],
      "name": "Keita Niikura"
    },
    {
      "affs": [
        1
      ],
      "name": "Youfeng Yue"
    },
    {
      "affs": [
        0,
        2
      ],
      "name": "Kengo Manabe",
      "orcid": "0000-0002-8601-8003"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/90gkpdmne30m7.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15008504/v1",
  "fulltext_url": null,
  "id": "90gkpdmne30m7",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008504/v1",
  "language": null,
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2508|Surface Modification and Superhydrophobicity"
    ]
  ],
  "openalex": "W7211961272",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15008504/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/90gkpdmne30m7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:17Z",
      "native_id": "10.26434/chemrxiv.15008504",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008504/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2508|Surface Modification and Superhydrophobicity",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Superhydrophobic-Like Complete Rebound of Impacting Water Droplets on a Smooth Oleic- Acid-Coated Phenyl-Silica Surface",
  "title_text": "Superhydrophobic-Like Complete Rebound of Impacting Water Droplets on a Smooth Oleic- Acid-Coated Phenyl-Silica Surface",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:17Z",
  "url": "https://research.draconitic.com/paper/90gkpdmne30m7",
  "venue": "ChemRxiv",
  "versions": []
}