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Unveiling Texture a...
Unveiling Texture and Topography of Fatty Acid Langmuir Films : Domain Stability and Isotherm Analysis
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- Bergendal, Erik (författare)
- KTH,Yt- och korrosionsvetenskap
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- Rutland, Mark W., Professor (författare)
- KTH,Yt- och korrosionsvetenskap,RISE Res Inst Sweden Chem Mat & Surfaces, SE-11486 Stockholm, Sweden.;Univ New South Wales, Sch Chem, Sydney, NSW 2052, Australia.;Ecole Cent Lyon, Lab Tribol & Dynam Syst, F-69134 Ecully, France.
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(creator_code:org_t)
- American Chemical Society (ACS), 2024
- 2024
- Engelska.
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Ingår i: Langmuir. - : American Chemical Society (ACS). - 0743-7463 .- 1520-5827. ; 40:20, s. 10468-10476
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 3D texturing by self-assembly at the air-water interface has recently been proposed. The hypothesis of this work is that, if this is true, such domain formation should be inferable directly from pressure-area isotherms and be thermodynamically stable. Monolayers of branched fatty acid mixtures with straight chain analogues and their stability are thus studied using a combination of pressure-area isotherms, thermodynamic analysis, in situ Brewster angle microscopy, and atomic force microscopy of both LB-deposited and drop-cast films on silicon wafers. Isotherms reflecting the behavior of monodisperse 3D domains are shown to be independent of compression rate and display long-term stability. Gibbs analysis further confirms the thermodynamic rather than kinetic origin of such novel species by revealing that deviations from ideal mixing can be explained only a priori by differences in the topography of the water surface, thus also indirectly confirming the self-assembly deformation of the water interface. The intrinsic self-assembly curvature and miscibility of the two fatty acids is confirmed by drop-casting, which also provides a rapid, tunable thin-film preparation approach. Finally, the longevity of the nanostructured films is extraordinary, the long-range order of the deposited films increases with equilibration time at the water interface, and the integrity of the nanopatterns remains intact on the scale of years.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
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