Abstract In this work, we have investigated anisotropic frictional behaviour of patterned silver surfaces. Anisotropy in coefficient of friction (COF) is observed depending on the sliding direction on one-arm and two-arm columnar structures as a function of applied normal load. Anisotropy in COF values for one-arm Ag nanocolumnar surface was observed to be as large as 42% when measured between along and transverse to the columnar tilt direction. However, the percentage change in COF values were as high as 67% for two-arm (zig-zag) nanocolumnar surface along the tilt direction of the columns between trace-retrace directions. There was a significant variation in COF of about 149% by changing geometry from one-arm to two-arm (zig-zag) nanorods, which is explained through a force balance model.

中文翻译：

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Ag纳米柱表面的摩擦各向异性

摘要 在这项工作中，我们研究了图案化银表面的各向异性摩擦行为。观察到摩擦系数 (COF) 的各向异性取决于单臂和双臂柱状结构上的滑动方向，作为施加的法向载荷的函数。当沿柱状倾斜方向和横向于柱状倾斜方向测量时，观察到单臂 Ag 纳米柱状表面的 COF 值的各向异性高达 42%。然而，对于两臂（之字形）纳米柱表面，沿着迹线-回扫方向之间柱的倾斜方向，COF 值的百分比变化高达 67%。通过将几何形状从单臂更改为双臂（锯齿形）纳米棒，COF 发生了约 149% 的显着变化，这可以通过力平衡模型进行解释。