Nano-mechanics of ionic liquids at dielectric and metallic interfaces,Faraday Discussions

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Nano-mechanics of ionic liquids at dielectric and metallic interfaces
Faraday Discussions ( IF 3.3 ) Pub Date : 2017-06-09 00:00:00 , DOI: 10.1039/c7fd00149e
Léo Garcia _{1,

2,

3,

4,

5} , Léa Jacquot _{1,

2,

3,

4,

5} , Elisabeth Charlaix _{1,

2,

3,

4,

5} , Benjamin Cross _{1,

2,

3,

4,

5}

Affiliation

Using a dynamic surface force apparatus, we investigate the nano-mechanics and the nano-rheology of an ionic liquid at dielectric and metallic solid surfaces. On smooth dielectric Pyrex surfaces, we find an ordered interfacial phase extending over less than 3 nm away from the top of the layer, with a compression modulus of 15 MPa extracted from the profile of the oscillatory forces. We discuss the boundary flow of the Newtonian bulk phase on this ordered interfacial layer. On metallic platinum surfaces, our hydrodynamic measurements evidence an interfacial soft solid layer extending up to 20 nm away from the top of the layer. The elastic modulus of this interfacial layer, derived from elasto-hydrodynamic measurements, is similar to the one found on Pyrex surfaces. Both on the dielectric and on the metal surfaces, the thickness of the interfacial phases is not found to change upon approach of the opposite surface, and does not exhibit a capillary-freezing transition.

中文翻译：

介电和金属界面处离子液体的纳米力学

使用动态表面力设备，我们研究了电介质和金属固体表面上离子液体的纳米力学和纳米流变学。在光滑的介电派热克斯表面上，我们发现有序界面相从该层的顶部延伸到小于3 nm的范围内，其压缩模量为15 MPa（从振荡力的分布图中提取）。我们讨论了该有序界面层上牛顿体相的边界流。在金属铂表面上，我们的流体力学测量结果表明，界面软固体层距离该层的顶部延伸达20 nm。从弹性流体动力学测量得出的该界面层的弹性模量类似于在派热克斯表面上发现的弹性模量。在电介质和金属表面上，

更新日期：2017-12-15

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