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Authors
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Elbourne, A. ; Dupont, M. ; Kariuki, R. ; Meftahi, N. ; Daeneke, T. ; Greaves, T. L. ; McConville, C. F. ; Bryant, G. ; Bryant, S. J. ; Besford, Q.A. ; Christofferson, A. J.
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Title
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Mapping the three-dimensional nanostructure of the ionic liquid-solid interface using atomic force microscopy and molecular dynamics simulations
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Date
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06.03.2023
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Number
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61326
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Abstract
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Ionic liquids (ILs) are a widely investigated class of solvents for scientific and industrial applications due to their desirable and “tunable” properties. The IL–solid interface is a complex entity, and despite intensive investigation, its true nature remains elusive. The understanding of the IL–solid interface has evolved over the last decade from a simple 1D double layer, to a 2D ordered interface, and finally a liquid-specific, complex 3D ordered liquid interface. However, most studies depend solely on one technique, which often only examine one aspect of the interfacial nanostructure. Here, a holistic study of the protic IL–solid interface is presented, which provides a more detailed picture of IL interfacial solvation. The 3D nanostructure of the ethylammonium nitrate (EAN)–mica interface is investigated using a combination of 1D, 2D, and 3D amplitude modulated-atomic force microscopy and molecular dynamics simulations. Importantly, it is found that the EAN–mica interface is more complex than previously reported, possessing surface-adsorbed, near-surface, surface-normal, and lateral heterogeneity, which propagates at relatively large distances from the solid substrate. The work presented in this study meaningfully enhances the understanding of the IL–solid interface.
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Publisher
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Advanced Materials Interfaces
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Wikidata
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Citation
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Advanced Materials Interfaces 10 (2023) 2202110
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DOI
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https://doi.org/10.1002/ADMI.202202110
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Tags
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