Influence of water on the interfacial nanostructure and wetting of [Rmim][NTf2] ionic liquids at mica surfaces

Title: Influence of water on the interfacial nanostructure and wetting of [Rmim][NTf2] ionic liquids at mica surfaces
Creator: Wang, Zhantao; Li, Hua; Atkin, Rob; Priest, Craig
Relation: ARC
Relation: Langmuir Vol. 32, Issue 35, p. 8818-8825
Publisher Link: http://dx.doi.org/10.1021/acs.langmuir.6b01790
Publisher: American Chemical Society
Resource Type: journal article
Date: 2016
Description: The effect of water concentration on the interfacial nanostructure and wetting behavior of a family of ionic liquids (ILs), 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, [Rmim][NTf2], at the surface of mica was investigated by contact angle measurement and atomic force microscopy (AFM). AFM reveals that interfacial layers of ILs observed at the surface of mica for “dry” ILs are not present for water-saturated ILs. The interaction of the IL ions of [Rmim][NTf2] with water molecules through hydrogen bonding is suspected to disrupt IL ion layering and precursor film growth on mica. Without the IL precursor film, contact angle relaxation of “wet” ILs on mica is less significant and ambient vapor adsorption becomes more important in determining the macroscopic wetting behavior.
Subject: water; interfacial nanostructures; ionic liquids; mica surfaces
Identifier: http://hdl.handle.net/1959.13/1319241
Identifier: uon:23811
Identifier: ISSN:0743-7463
Language: eng
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