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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,KTH Royal Institute of Technology, Sweden
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- Rutland, Mark W., Professor (författare)
- KTH,RISE,Material- och ytdesign,KTH Royal Institute of Technology, Sweden; University of New South Wales, Australia; École Centrale de Lyon, France,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, 2024
- 2024
- Engelska.
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Ingår i: Langmuir. - : American Chemical Society. - 0743-7463 .- 1520-5827. ; 40:20, s. 10468-10476
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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 (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- Air; Drops; Film preparation; Isotherms; Phase interfaces; Silicon wafers; Textures; Thermoanalysis; Thin films; Topography; fatty acid; nanofilm; silicon; surface water; water; 3D texturing; Air/Water Interfaces; Atomic-force-microscopy; Brewster angle microscopy; Domain formation; Fatty acid mixture; Pressure-area isotherms; Thermo dynamic analysis; Thermodynamically stable; Water interface; article; atomic force microscopy; Brewster angle microscopy; compression; controlled study; isotherm; kinetics; longevity; miscibility; pressure; thermodynamics; topography; Fatty acids
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Langmuir
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