{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,4]],"date-time":"2025-11-04T23:22:25Z","timestamp":1762298545853,"version":"build-2065373602"},"reference-count":36,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2017,2,7]],"date-time":"2017-02-07T00:00:00Z","timestamp":1486425600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"cefipra - Raman-Charpak Fellowship","award":["IFC\/4052-EDP\/Raman-Charpak\/2015\/55"],"award-info":[{"award-number":["IFC\/4052-EDP\/Raman-Charpak\/2015\/55"]}]},{"name":"European Synchrotron Research Facility (ESRF)","award":["Proposal SC4050"],"award-info":[{"award-number":["Proposal SC4050"]}]}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["ChemPhysChem"],"published-print":{"date-parts":[[2017,3,17]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Sophorolipids (SLs), a class of microbially derived biosurfactants, are reported by different research groups to have different self\u2010assembled structures (either micelles or giant ribbons) under the same conditions. Here we explore the reasons behind these contradictory results and attribute these differences to the role of specific congeners that are present in minute quantities. We show that a sample composed of a majority of oleic acid (C18:1) sophorolipid in the presence of only 0.5\u2009% (or more) of congeners with stearic acid (C18:0) or linoleic acid (C18:2) results in the formation of micelles that are stable over long periods of time. Conversely, the presence of only 10 to 15\u2009% of congeners with a stearic acid chain gives fibrillar structures instead of micelles. To study the mechanisms responsible, oleic acid SLs devoid of any other congeners were prepared. Very interestingly, this sample can self\u2010assemble into either micelles or fibers depending on minute modifications to the self\u2010assembly conditions. The findings are supported by light scattering, small\u2010angle X\u2010ray scattering, transmission electron microscopy under cryogenic conditions, high\u2010pressure liquid chromatography, and NMR spectroscopy.<\/jats:p>","DOI":"10.1002\/cphc.201601323","type":"journal-article","created":{"date-parts":[[2017,2,7]],"date-time":"2017-02-07T09:02:56Z","timestamp":1486458176000},"page":"643-652","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":34,"title":["Micelles versus Ribbons: How Congeners Drive the Self\u2010Assembly of Acidic Sophorolipid Biosurfactants"],"prefix":"10.1002","volume":"18","author":[{"given":"Prabhu","family":"Dhasaiyan","sequence":"first","affiliation":[{"name":"Physical and Materials Chemistry Division, CSIR\u2014 National Chemical Laboratory  Dr. Homi Bhabha road Pune Maharashtra India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patrick","family":"Le\u2005Griel","sequence":"additional","affiliation":[{"name":"Sorbonne Universit\u00e9s UPMC Univ Paris 06, CNRS, Coll\u00e8ge de France, Laboratoire de Chimie de la Mati\u00e8re Condens\u00e9e de Paris, UMR 7574  4, Place Jussieu 75005 Paris France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sophie","family":"Roelants","sequence":"additional","affiliation":[{"name":"Bio Base Europe Pilot Plant  Rodenhuizekaai 1 9042 Ghent Belgium"},{"name":"InBio, Department of Biochemical and Microbial Technology, Faculty of Bioscience Engineering Ghent University  Coupure Links 653 9000 Ghent Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emile","family":"Redant","sequence":"additional","affiliation":[{"name":"Bio Base Europe Pilot Plant  Rodenhuizekaai 1 9042 Ghent Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Inge N. 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