What causes extended layering of ionic liquids on the mica surface?

Gong, Xiao; Kozbial, Andrew; Li, Lei

doi:10.1039/c5sc00832h

Cited by 65 publications

(119 citation statements)

References 41 publications

(64 reference statements)

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“…As the adsorbed water molecules were released due to heating, hydrocarbon contaminants might replace the water molecules on the mica surface . The adsorbed contaminants would likely block the interaction between K ions and negative vacancies in the frame of mica . This should lead to the decrease in adhesion energy of the MNL mica system.…”

Section: Resultsmentioning

confidence: 99%

Environment‐Dependent Adhesion Energy of Mica Nanolayers Determined by a Nanomanipulation‐Based Bridging Method

Hou

Wang

et al. 2018

Adv Materials Inter

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Mica nanolayers have great potential for applications in the future flexible electronics due to their excellent flexibility and dielectric properties. Characterization of the adhesion behaviors of mica nanolayers is thus essential, as they would substantially affect the reliability of the electronic devices. In this work, a new delamination method is developed based on the optical microscopic nanomanipulation for measuring the adhesion energy of mica nanolayers. In particular, the tests are performed under different environmental conditions with relative humidity varying from 10% to 90% and temperature ranging from 25 to 300 °C. The average surface energy of mica nanolayers is 221.5 ± 25.4 mJ m−2 measured at the room temperature of 25 °C and decreases with the increase in relative humidity or temperature. The finding of the environmentally dependent adhesion is of importance for the design of flexible electronics products based on mica nanolayers.

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Section: Resultsmentioning

confidence: 99%

Environment‐Dependent Adhesion Energy of Mica Nanolayers Determined by a Nanomanipulation‐Based Bridging Method

Hou

Wang

et al. 2018

Adv Materials Inter

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“…Since most of the above‐mentioned solid surfaces, for example, silica and mica, are believed to be negatively charged, it is generally accepted that the electrostatic interactions at IL/solid interface is critical to the extended layering of RTILs . Recent research in our lab demonstrated that, adsorbed water is the key reason to the extended layering of ILs on the mica surface . The AFM results (Figure ) clearly revealed that ILs form extended layering when water is adsorbed on the mica surface under ambient conditions, while droplet structure, that is, dewetting, occurs on the mica surface, when the water is removed by heating at elevated temperatures.…”

Section: Ionic Liquids: Liquids or Solids?mentioning

confidence: 86%

Section: Ionic Liquids: Liquids or Solids?mentioning

confidence: 99%

Nanometer‐Thick Ionic Liquids as Boundary Lubricants

Gong

2017

Adv Eng Mater

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Ionic liquids (ILs) are fascinating materials with unique combination of solid and liquid properties. Due to high thermal stability and promising tribological properties, there have been increasing research interests in applying ILs as boundary lubricants. In this review, the authors will discuss the recent progress on this topic with the emphasis on the relationship between the molecular arrangement of ILs confined to a solid and the tribological properties. First, the fundamentals on boundary lubrication and the state-ofthe-art lubricants will be reviewed briefly. Second, the progress on the molecular structure of ILs confined to a solid surface will be discussed. Afterward, the experimental and computational efforts on the ILs as boundary lubricants will be discussed in details with emphasis on the effect of IL structure, solid substrates, and IL-soild interaction. Finally, the future research directions will be discussed.

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“…[10] For example, Liu et al [11] reported a novel method to fabricate a robust and corrosion resistant superhydrophobic aluminum alloy surface which has good mechanical stability. [17,18] This cleaner emits a high-intensity UV light with both 185 and 254 nm wavelengths. [12][13][14] However, the synthesis of nanoparticles is usually complex and expensive.…”

Section: Introductionmentioning

confidence: 99%

“…UV/ozone treatment was conducted on some alumina/glass samples, using a BioForce Nanosciences UV/ozone ProCleaner. [17,18] This cleaner emits a high-intensity UV light with both 185 and 254 nm wavelengths. The UV/ozone treatment was conducted in the ambient air and for a time period of 10 min for all the samples treated.…”

Section: Introductionmentioning

confidence: 99%

A Cost‐Effective Approach to Fabricate Superhydrophobic Coatings Using Hydrophilic Materials

et al. 2015

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Superhydrophobic coatings have many important applications and previous studies have shown that both hydrophobic material and certain surface topographical features are required to achieve the desired superhydrophobicity. Here, we report a simple and cost-effective approach to fabricate superhydrophobic coatings using alumina powders, which are intrinsically hydrophilic. The water contact angle (WCA) of the coating is close to 150 and the observed superhydrophobicity has been attributed to both the powder-induced surface topographical features and the airborne hydrocarbon contamination. This work provides a facile yet robust approach to fabricate superhydrophobic coatings, which is potentially applicable for many other hydrophilic materials. Experimental Section Fabrication of CoatingsAlumina powder (Aldrich; average 10 mm in size; used as received) was placed onto a glass microscope slide (Aldrich;[*] Dr.

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What causes extended layering of ionic liquids on the mica surface?

Abstract: The adsorbed water on the mica surface is the key to the extended layering of ILs.

Cited by 65 publications

References 41 publications

Environment‐Dependent Adhesion Energy of Mica Nanolayers Determined by a Nanomanipulation‐Based Bridging Method

Environment‐Dependent Adhesion Energy of Mica Nanolayers Determined by a Nanomanipulation‐Based Bridging Method

Nanometer‐Thick Ionic Liquids as Boundary Lubricants

A Cost‐Effective Approach to Fabricate Superhydrophobic Coatings Using Hydrophilic Materials

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