Surface force at the nano-scale: Observation of non-monotonic surface tension and disjoining pressure

Peng, Tiefeng, Firouzi, Mahshid, Li, Qibin and Peng, Kang (2015) Surface force at the nano-scale: Observation of non-monotonic surface tension and disjoining pressure. Physical Chemistry Chemical Physics, 17 32: 20502-20507. doi:10.1039/c5cp03050a


Author Peng, Tiefeng
Firouzi, Mahshid
Li, Qibin
Peng, Kang
Title Surface force at the nano-scale: Observation of non-monotonic surface tension and disjoining pressure
Journal name Physical Chemistry Chemical Physics   Check publisher's open access policy
ISSN 1463-9076
1463-9084
Publication date 2015-07-14
Year available 2015
Sub-type Article (original research)
DOI 10.1039/c5cp03050a
Open Access Status Not Open Access
Volume 17
Issue 32
Start page 20502
End page 20507
Total pages 6
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Abstract Nano bubbles and films are important in theory and various applications, such as the specific ion effect of bubble coalescence, flotation and porous medium seepage; these rely greatly on the fundamental aspects of extended-DLVO surface forces. However, the origin and validation of the non-DLVO forces are still obscure, especially at the nano scale (1–5 nm). Herein, we report the first determination of the disjoining pressures of aqueous electrolyte nano-films using molecular dynamics (MD) simulations. Our results showed that adding salt does not lead to a decrease in the disjoining pressure. On the contrary, higher concentrations results in greater disjoining pressures. In addition, the temperature was found to significantly change the pattern of the disjoining pressure isotherm. These results aid the understanding of a number of underlying mechanisms, involving nano solid–liquid–gas surfaces.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2016 Collection
 
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