Number of the records: 1
Scaling Behavior of Thin Films on Chemically Heterogeneous Walls.
- 1.
SYSNO ASEP 0482992 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Scaling Behavior of Thin Films on Chemically Heterogeneous Walls. Author(s) Malijevský, Alexandr (UCHP-M) RID, ORCID, SAI
Parry, A.O. (GB)
Pospíšil, M. (CZ)Article number 032801 Source Title Physical Review E. - : American Physical Society - ISSN 2470-0045
Roč. 96, č. 3 (2017)Number of pages 6 s. Language eng - English Country US - United States Keywords wetting ; scaling ; density functional theory Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GA17-25100S GA ČR - Czech Science Foundation (CSF) Institutional support UCHP-M - RVO:67985858 UT WOS 000411087600010 EID SCOPUS 85029879563 DOI 10.1103/PhysRevE.96.032801 Annotation We study the adsorption of a fluid in the grand canonical ensemble occurring at a planar heterogeneous wall which is decorated with a chemical stripe of width L. We suppose that the material of the stripe strongly preferentially adsorbs the liquid in contrast to the outer material which is only partially wet. This competition leads to the nucleation of a droplet of liquid on the stripe, the height hm and shape of which (at bulk two-phase coexistence) has been predicted previously using mesoscopic interfacial Hamiltonian theory. We test these predictions using a microscopic Fundamental Measure Density Functional Theory which incorporates short-ranged fluid-fluid and fully long-rangedwall-fluid interactions. Our model functional accurately describes packing effects not captured by the interfacial Hamiltonian but still we show that there is excellent agreement with the predictions h(m) approximate to L-1/2 and for the scaled circular shape of the drop even for L as small as 50 molecular diameters. For smaller stripes the droplet height is considerably lower than that predicted by the mesoscopic interfacial theory. Phase transitions for droplet configurations occurring on substrates with multiple stripes are also discussed.
Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2018
Number of the records: 1