Oil-in-Water Emulsions Probed Using Fluorescence Multivariate-Curve-Resolution Spectroscopy

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dc.authoridErtekin, Umay Eren/0009-0008-1771-6087
dc.authoridMUTLU, FERHAT/0000-0003-2234-021X
dc.authoridGundogdu, Gulsum/0000-0003-2380-7942
dc.authoridOkur, Halil I./0000-0002-2492-1168
dc.contributor.authorGundogdu, Gulsum
dc.contributor.authorTopuzlu, Ezgi Yilmaz
dc.contributor.authorMutlu, Ferhat
dc.contributor.authorErtekin, Umay E.
dc.contributor.authorOkur, Halil I.
dc.date.accessioned2025-02-20T08:42:17Z
dc.date.available2025-02-20T08:42:17Z
dc.date.issued2024
dc.departmentTürk-Alman Üniversitesien_US
dc.description.abstractHydrophobic surfaces in contact with aqueous media are omnipresent in nature. A plethora of key biological and physiological processes occur at the interface of immiscible fluids. Besides its fundamental importance, probing such interfaces is rather challenging, especially when one medium is bathed in the other. Herein, we demonstrate a fluorescence-based method that probes the oil-water interface and interfacial processes through surface dielectric perturbations. The fluorescence response of Nile Red is measured in hexadecane in water nanoemulsions. Three major spectral components appear: two from the bulk liquid media (hexadecane and water) and a distinct band at around 640 nm due to the interfacial component. Such spectra are deconvoluted using the multivariate-curve-resolution algorithm, and interface-correlated fluorescence spectra are attained. The influence of anionic sodium dodecylbenzenesulfonate (SDBS) and cationic cetyltrimethylammonium bromide (CTAB) surfactants on the oil-water interface is elucidated with concentration-dependent measurements. A charge-dependent spectral shift is observed. The interface correlated band at 641 nm for bare hexadecane nanoemulsions red shifts in the presence of anionic surfactants, indicating an apparent dielectric increase. In contrast, the same band gradually blue shifts with increasing cationic surfactant concentration, indicating an apparent interface dielectric decrease. Such a method can be utilized to probe alterations at interfaces beyond the oil/water interface.
dc.description.sponsorshipT?rkiye Bilimler Akademisi; TUBA-GEBIP Outstanding Young Investigator Award; Science Academy BAGEP Young Scientist Awards
dc.description.sponsorshipThis work was supported by the TUBA-GEBIP Outstanding Young Investigator Award and the Science Academy BAGEP Young Scientist Awards. We sincerely thank Prof. Sylvie Roke for fruitful discussions and Laboratory for Fundamental BioPhotonics at EPFL to allow us to perform data acquisition of the early stages of this study.
dc.identifier.doi10.1021/acs.langmuir.4c01018
dc.identifier.endpage13121en_US
dc.identifier.issn0743-7463
dc.identifier.issn1520-5827
dc.identifier.issue25en_US
dc.identifier.pmid38861700
dc.identifier.scopus2-s2.0-85196009227
dc.identifier.scopusqualityQ1
dc.identifier.startpage13116en_US
dc.identifier.urihttps://doi.org/10.1021/acs.langmuir.4c01018
dc.identifier.urihttps://hdl.handle.net/20.500.12846/1631
dc.identifier.volume40en_US
dc.identifier.wosWOS:001246058800001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherAmer Chemical Soc
dc.relation.ispartofLangmuir
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250220
dc.subjectSum-Frequency Spectroscopyen_US
dc.subjectX-Rayen_US
dc.subjectSurfactant Adsorptionen_US
dc.subjectInterfacesen_US
dc.subjectDropletsen_US
dc.subjectIonen_US
dc.subjectGenerationen_US
dc.subjectMonolayersen_US
dc.subjectSolvationen_US
dc.subjectMechanismen_US
dc.titleOil-in-Water Emulsions Probed Using Fluorescence Multivariate-Curve-Resolution Spectroscopy
dc.typeArticle

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