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Nature of Dynamic Friction in a Humid Hydrophobic Nanocontact
ACS Nano ( IF 15.8 ) Pub Date : 2022-06-22 , DOI: 10.1021/acsnano.2c02665 Olivier Noël 1 , Pierre-Emmanuel Mazeran 2 , Igor Stanković 3
ACS Nano ( IF 15.8 ) Pub Date : 2022-06-22 , DOI: 10.1021/acsnano.2c02665 Olivier Noël 1 , Pierre-Emmanuel Mazeran 2 , Igor Stanković 3
Affiliation
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The physics of dynamic friction on water molecule contaminated surfaces is still poorly understood. In line with the growing interest in hydrophobic contact for industrial applications, this paper focuses on friction mechanisms in such interfaces. As a commonly used material, contact with graphite is considered in a twin-fold approach based on experimental investigations using the circular mode atomic force microscopy technique combined with molecular dynamic simulations. We demonstrate that an intuitive paradigm, which asserts that water molecules are squeezed out of a hydrophobic contact, should be refined. As a consequence, we introduce a mechanism considering a droplet produced within the sliding nanocontact by the accumulation of water adsorbed on the substrate. Then we show that a full slip regime of the droplet sliding on the hydrophobic substrate explains the experimental tribological behavior.
中文翻译：
潮湿疏水纳米接触中动态摩擦的性质
水分子污染表面上的动态摩擦物理学仍然知之甚少。随着人们对工业应用中疏水接触的兴趣日益浓厚，本文重点研究了此类界面中的摩擦机制。作为一种常用材料，基于使用圆形模式原子力显微镜技术结合分子动力学模拟的实验研究，以双重方法考虑与石墨的接触。我们证明了一个直观的范式，它断言水分子被挤出疏水接触，应该被改进。因此，我们引入了一种机制，考虑通过吸附在基板上的水的积累在滑动纳米接触内产生的液滴。
更新日期：2022-06-22
中文翻译：
潮湿疏水纳米接触中动态摩擦的性质
水分子污染表面上的动态摩擦物理学仍然知之甚少。随着人们对工业应用中疏水接触的兴趣日益浓厚，本文重点研究了此类界面中的摩擦机制。作为一种常用材料，基于使用圆形模式原子力显微镜技术结合分子动力学模拟的实验研究，以双重方法考虑与石墨的接触。我们证明了一个直观的范式，它断言水分子被挤出疏水接触，应该被改进。因此，我们引入了一种机制，考虑通过吸附在基板上的水的积累在滑动纳米接触内产生的液滴。
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