Thermodynamic aspects of nanoscale friction
Thermodynamic aspects of nanoscale friction
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DOI：
10.1103/physrevb.100.125431
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发表时间：
2019-05
影响因子：
3.7
通讯作者：
P. Torche;T. Polcar;O. Hovorka
中科院分区：
文献类型：
--
作者：
P. Torche;T. Polcar;O. Hovorka
发展摩擦的非平衡热力学是为广泛的技术应用而系统地设计低摩擦表面所必需的。直观地说，材料沿表面滑动所做的热力学功应该部分地以热的形式散失，部分地转化为系统内部能量的变化。然而，指导这种分离的一般非平衡热力学原理目前尚不清楚。将过渡态理论与传统的Prandtl-Tomlinson模型相结合，建立了计算典型摩擦力显微镜(FFM)针尖摩擦粘滑运动过程中的散热和内能变化的理论框架。在纳米摩擦的实际应用中，我们使用该公式来量化与材料相关的一系列参数的散热。
Developing the non-equilibrium thermodynamics of friction is required for systematic design of low friction surfaces for a broad range of technological applications. Intuitively, the thermodynamic work done by a material sliding along a surface is expected to be partially dissipated as heat and partially transformed into the change of the internal energy of the system. However, general non-equilibrium thermodynamic principles governing this separation are presently unknown. We develop a theoretical framework based on the transition state theory combined with the conventional Prandtl-Tomlinson model, allowing to set explicit expressions for evaluating the heat dissipation and internal energy change produced during the frictional stick-slip motion of a tip of a typical friction force microscope (FFM). We use the formalism to quantify the heat dissipation for a range of parameters relevant to materials in practical applications of nanoscale friction.