Water-induced mica/ionic liquid interfacial nanostructure switches revealed by AFM

Liu, Shuai; Li, Miangang; Jin, Peng; Chen, Li; Mao, Bing‐Wei; Yan, Jiawei

doi:10.1039/d0cc06587k

Cited by 5 publications

(3 citation statements)

References 30 publications

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“…86,89,147 On the other hand, the layered ion structures of ILs at solid interfaces can be altered by adding trace water, and with the increase of water concentration, the long-range monotonic force of ILs at solid interfaces switches from van der Waals attraction to double layer repulsion. 187 In the context of the interfacial structuring of ILs, the effects of water strongly depend on both surface charging and interfacial wetting properties. In general, the effect of water on IL structuring is a consequence of balances between ion-water, ion-surface, surface-water, and surface-ion interactions that may vary greatly at different ion/solid interfaces.…”

Section: Humiditymentioning

confidence: 99%

Atomic force microscopy probing interactions and microstructures of ionic liquids at solid surfaces

Laaksonen

et al. 2022

Nanoscale

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Section: Humiditymentioning

confidence: 99%

Atomic force microscopy probing interactions and microstructures of ionic liquids at solid surfaces

Laaksonen

et al. 2022

Nanoscale

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“…So far, studies of ILs/DESs‐water systems mainly focus on the potential dependent structures of the innermost layer and several nanometers from the charged surface, an issue remains open about the effect of water on the structure at several tens of nanometers away from the solid surface. [ 66 ] AFM‐based 3D imaging of EDL, which has already been used in ionic liquids, is expected to reveal the effect of water on the interfacial structure in ILs and DESs. [ 67 ] Undoubtedly, besides the role of water in the interfacial structure, the resultant effect of water on electrochemical reaction kinetics is of particular interest, which is worthy of further investigation like in ILs and DESs.…”

Section: Discussionmentioning

confidence: 99%

Electrochemical interfaces in ionic liquids/deep eutectic solvents incorporated with water: A review

Liu

Tan

et al. 2022

Electrochemical Science Adv

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Ionic Liquids (ILs) and deep eutectic solvents (DESs) are promising candidate electrolytes in electrochemical fields due to their excellent properties. They can absorb water from the environment quickly, the existence of water in ILs/DESs benefits or harms their performance depending on the purpose of the applications. Therefore, studies on the effect of water on the properties of ILs/DESs have received much attention in recent years. This mini‐review provides an overview of the structure of the electrochemical interface in ILs/DESs incorporated with water by summarizing the information acquired from a variety of characterization technologies and simulations. Both our understanding of the interfacial structure and our perspective on further research in the field are presented.

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“…It shows that there exists stabilizing effect of enhanced cation‐interfacial layers hydrogen bonding as the separation between hydroxide radical and cations increases, exhibiting the controllability of the interfacial structures through hydrogen bonding, and cation polarizability. In addition, in 2020, Yan's group [ 178 ] found it possible to switch the long‐range interactions from vdW attractive force to EDL repulsive force via increasing the content of water in a mica/pyrrolidinium system. This work highlights the challenge for practical applications of ionic liquids as water in the air will inevitably be absorbed by the ionic liquid, which could change the properties of the solid–liquid interface.…”

Section: Applicationsmentioning

confidence: 99%

Principles and Applications of Liquid‐Environment Atomic Force Microscopy

Chen

Liao

et al. 2022

Adv Materials Inter

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has been devoted to these areas due to the appearance of divergent phenomena at different scales, such as macroscopic fluid dynamics, mesoscopic hydrogen bond network, and nanoscopic hydration layer. Especially, as the basis of numerous important but complex physicochemical processes, such as dissolution, crystallization, corrosion, catalysis, protein folding, and so on, [10][11][12][13][14][15] the research of the underlying mechanism and atomic dynamics at the solid-liquid interface call for characterization technology of both high spatial and temporal resolution in liquid. Furthermore, forces between solid objects in liquid are very different from those in vacuum or air due to the emergence of the solid-liquid interface, and the measurement of these forces could provide a unique pathway to understanding the system dynamics in liquid. As a whole, an in-depth understanding of a solid-liquid system calls for efficient characterization techniques of high spatial and temporal resolution, as well as force measurement of high sensitivity. For various widely adopted characterization methods including Fourier transform infrared spectroscopy, [16] sum-frequency vibrational spectroscopy, [17] X-ray photoelectron spectroscopy, [18] environment scanning electron microscope, [19] surface force apparatus, [20] and so on, only one or two of these goals could be achieved. By contrast, the fast-developing atomic force microscopy (AFM) provides a feasible strategy for the investigation of solid-liquid interfaces.AFM was invented in 1986 for obtaining the high-resolution surface topography of materials [21] regardless of their electrical conductivity, which utilizes a cantilever as the force sensor to raster scan the interaction between a sample and a tip at the cantilever's free end and obtains the sample topography through a feedback control system. Three years later, Hansma's group [22] applied AFM in the liquid environment for the first time and obtained atomic-scale images of a mica surface, which unveiled the prelude to the application of LE-AFM. However, the static mode used by early LE-AFM was invasive to the sample during raster scanning. When LE-AFM was applied to susceptible samples such as biological materials, the static scanning mode is no longer adequate. To overcome this issue, various dynamic modes were proposed, including amplitude modulation (AM) mode, frequency modulation (FM) mode, and so on. In 1994, Putman et al. [23,24] applied AM mode LE-AFM to image monkey Liquid environment is essential for the occurrence of various vital processes in fields of chemistry, biology, mechanics, and so on, underscoring the importance of understanding the solid-liquid interfaces. In the past decades, liquid-environment atomic force microscopy (LE-AFM) has played a nonsubstitutable role in studying solid-liquid interfaces because of its sub-nanometer spatial resolution, video-level imaging rates as well as piconewton-level force measuring capabilities. Various state-of-the-art developments and exciting applications are made r...

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Water-induced mica/ionic liquid interfacial nanostructure switches revealed by AFM

Abstract: Glovebox-AFM-based force curve measurements have been employed to investigate the effect of controlled small amounts of water on the interfacial structure of mica/a pyrrolidinium-based ionic liquid. A close examination reveals...

Cited by 5 publications

References 30 publications

Atomic force microscopy probing interactions and microstructures of ionic liquids at solid surfaces

Atomic force microscopy probing interactions and microstructures of ionic liquids at solid surfaces

Electrochemical interfaces in ionic liquids/deep eutectic solvents incorporated with water: A review

Principles and Applications of Liquid‐Environment Atomic Force Microscopy

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