Premium
Influence of Perfluorohexane‐Enriched Atmosphere on Viscoelasticity and Structural Order of Self‐Assembled Semifluorinated Alkanes at the Air‐Water Interface
Author(s) -
Mielke Salomé,
Abuillan Wasim,
Veschgini Mariam,
Liu Xianhe,
Konovalov Oleg,
Krafft Marie Pierre,
Tanaka Motomu
Publication year - 2019
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201900316
Subject(s) - monolayer , chemical engineering , grazing incidence small angle scattering , viscoelasticity , materials science , micelle , atmosphere (unit) , adsorption , molecule , rheology , pulmonary surfactant , chemical physics , nanotechnology , chemistry , scattering , composite material , organic chemistry , optics , thermodynamics , small angle neutron scattering , aqueous solution , neutron scattering , physics , engineering
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.