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The wetting behaviors of partially miscible binary liquid systems are especially complex. Here, we report evidence of universal behavior in the divergence of wetting layer growth at liquid\u2013vapor interfaces of the cyclohexane + aniline, hexane + o-toluidine, and methanol + carbon disulfide systems. Layer growth on the micron scale was followed using visible light scattering from stirred samples. The layer thicknesses were found to diverge with decreasing temperature when coexistence was approached from the one-phase region, but only for solutions richer in the higher density\/higher surface tension component. The onset of divergence was &amp;lt;1\u00a0K above the bulk coexistence temperature; nearer the critical composition, the onset temperature was the critical temperature itself. All three systems showed identical divergent wetting properties after variable normalization. In contrast, no divergent wetting layer formation was seen in the benzene + 1,2-propanediol or water + phenol systems. The mathematical sign\u00a0of the Hamaker constant correlates with the contrasting behaviors. Collectively, these results have implications for theoretical descriptions of adsorption layer growth and crossover behavior, for measurements of complete wetting temperatures, and for practical applications.<\/jats:p>","DOI":"10.1063\/5.0105690","type":"journal-article","created":{"date-parts":[[2022,8,3]],"date-time":"2022-08-03T15:06:45Z","timestamp":1659539205000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":2,"title":["Off-critical wetting layer divergence at the liquid\/vapor interface of binary liquid mixtures"],"prefix":"10.1063","volume":"157","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3711-1682","authenticated-orcid":false,"given":"J. Charles","family":"Williamson","sequence":"first","affiliation":[{"name":"Department of Chemistry, Willamette University , 900 State Street, Salem, Oregon 97301, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emily E.","family":"Weatherford","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Willamette University , 900 State Street, Salem, Oregon 97301, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Makayla M.","family":"DenBeste","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Willamette University , 900 State Street, Salem, Oregon 97301, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K. Caroline","family":"Riley","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Willamette University , 900 State Street, Salem, Oregon 97301, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7108-1387","authenticated-orcid":false,"given":"Estella F.","family":"Yee","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Willamette University , 900 State Street, Salem, Oregon 97301, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sawyer T.","family":"Rogers","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Willamette University , 900 State Street, Salem, Oregon 97301, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7108-3996","authenticated-orcid":false,"given":"Clara A.","family":"Tibbetts","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Willamette University , 900 State Street, Salem, Oregon 97301, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"317","published-online":{"date-parts":[[2022,8,29]]},"reference":[{"key":"2023081006433340300_c1","volume-title":"Surface Wetting: Characterization, Contact Angle, and Fundamentals","year":"2016"},{"key":"2023081006433340300_c2","volume-title":"Wetting of Real Surfaces","year":"2018","edition":"2nd ed."},{"key":"2023081006433340300_c3","doi-asserted-by":"publisher","first-page":"1085","DOI":"10.1088\/0034-4885\/64\/9\/202","article-title":"Wetting transitions","volume":"64","year":"2001","journal-title":"Rep. 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