Journal article
Model of Meniscus Shape and Disjoining Pressure of Thin Liquid Films on Nanostructured Surfaces with Electrostatic Interactions
Journal of physical chemistry. C, v 119(21), pp 11777-11785
28 May 2015
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The effect of electrostatic interactions on the stability of thin liquid,films on nanostructured surfaces important in lubrication, wetting, and phase, change but is poorly understood. In this study, a general, closed-form model is developed to account for both the effects of electrostatic and van der Waals interactions on meniscus shape and disjoining pressure for thin liquid films on nanostructured surfaces based on the minimization of free energy, the Derjaguin approx.-filiation, and the disjoining pressure theory for flat surfaces. The model is verified using the molecular dynamics (MD) simulations for a water-alumina system with both triangular and square nanostructures of varying depth and,film thickness. Good agreement is obtained between MD results and model predictions, demonstrating the robustness of the analytical model. The results show that the electrostatic interactions enhance the disjoining pressure, thereby making the meniscus more conformal to the nanostructured surfaces. In addition, the electrostatic disjoining pressure is shown to increase with the nanostructure depth but decrease with the thin film thickness.
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Details
- Title
- Model of Meniscus Shape and Disjoining Pressure of Thin Liquid Films on Nanostructured Surfaces with Electrostatic Interactions
- Creators
- Han Hu - Drexel UniversityChristopher R. Weinberger - Drexel UniversityYing Sun - Drexel University
- Publication Details
- Journal of physical chemistry. C, v 119(21), pp 11777-11785
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 9
- Grant note
- DMR-1104835; CMMI-1401438 / National Science Foundation; National Science Foundation (NSF) TG-CTS110056 / Extreme Science and Engineering Discovery Environment (XSEDE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- College of Engineering
- Web of Science ID
- WOS:000355495600057
- Scopus ID
- 2-s2.0-84930647213
- Other Identifier
- 991019167462104721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology