Influence of perfluorohexane-enriched atmosphere on viscoelasticity and structural order of self-assembled semifluorinated alkanes at the air-water interface

• Verfasst von: Mielke, Salomé [VerfasserIn]
• Verfasst von: Abuillan, Wasim [VerfasserIn]
• Verfasst von: Veschgini, Mariam [VerfasserIn]
• Verfasst von: Tanaka, Motomu [VerfasserIn]
• Titel: Influence of perfluorohexane-enriched atmosphere on viscoelasticity and structural order of self-assembled semifluorinated alkanes at the air-water interface
• Verf.angabe: Salomé Mielke, Wasim Abuillan, Mariam Veschgini, Xianhe Liu, Oleg Konovalov, Marie Pierre Krafft, and Motomu Tanaka
• E-Jahr: 2019
• Jahr: June 12, 2019
• Umfang: 8 S.
• Fussnoten: Gesehen am 04.12.2019
• Titel Quelle: Enthalten in: ChemPhysChem
• Ort Quelle: Weinheim : Wiley-VCH Verl., 2000
• Jahr Quelle: 2019
• Band/Heft Quelle: 20(2019), 13, Seite 1698-1705
• ISSN Quelle: 1439-7641
• DOI: doi:10.1002/cphc.201900316
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: GISAXS
• Sach-SW: microbubbles
• Sach-SW: perfluorohexane
• Sach-SW: rheology
• Sach-SW: semifluorinated alkanes
• K10plus-PPN: 1684156254

Abstract

Abstract: Semifluorinated alkanes FnHm self-assemble into nanometer-sized surface micelles at the air-water interface. In this study, we investigated how an atmosphere enriched with perfluorohexane (PFH) influences the interfacial viscoelasticity and structural order of a monolayer of FnHm by the combination of dilational rheology and grazing-incidence small-angle X-ray scattering (GISAXS). The monolayers behaved predominantly elastic which can be attributed to the strong dipole repulsions of the surface domains. Enrichment of the atmosphere with PFH lead to an increase of the compressibility and a decrease of the elastic modulus without altering the structural ordering of the FnHm molecules into highly correlated nanodomains, suggesting the adsorption of PFH molecules to the free spaces between the domains. The capability of FnHm domains to retain the structural integrity in the presence of PFH gas is promising for the fabrication of stable microbubbles for sonographic imaging.