Liquids on Topologically Nanopatterned Surfaces

 Title: Liquids on Topologically Nanopatterned Surfaces Author: Gang, Oleg; Alvine, Kyle J.; Fukumo, Masafumi; Pershan, Peter S.; Black, Charles T.; Ocko, Benjamin M. Note: Order does not necessarily reflect citation order of authors. Citation: Gang, Oleg, Kyle J. Alvine, Masafumi Fukuto, Peter S. Pershan, Charles T. Black, and Benjamin M. Ocko. 2005. Liquids on topologically nanopatterned surfaces. Physical Review Letters 95(21): 217801. Full Text & Related Files: Gang_Liquids.pdf (515.2Kb; PDF) Abstract: We report here surface x-ray scattering studies of the adsorption of simple hydrocarbon liquid films on nanostructured surfaces—silicon patterned by an array of nanocavities. Two different regimes, filling and growing, are observed for the wetting film evolution as a function of the chemical potential offset $$\Delta \mu$$ from the bulk liquid-vapor coexistence. The strong influence of geometrical effects is manifested by a $$\Delta \mu$$ dependence of liquid adsorption $$\Gamma$$ in the nanocavities that is stronger than the van der Waals behavior $$\Gamma ~\Delta \mu -1/3$$ for flat surfaces. The observed $$\Delta \mu$$ dependence is, however, much weaker than predicted for the infinitely deep parabolic cavities, suggesting that the finite-size effects contribute significantly to the observed adsorption behavior. Published Version: doi:10.1103/PhysRevLett.95.217801 Other Sources: http://liquids.seas.harvard.edu/peter/2005.pdf/PRL95_217801_05.pdf Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4239019

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• FAS Scholarly Articles [5571]
Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University