角鲨烷
消散
云母
打滑(空气动力学)
烷烃
分子动力学
材料科学
机械
物理
经典力学
热力学
化学
复合材料
碳氢化合物
有机化学
量子力学
色谱法
作者
Yunhua Zhu,Steve Granick
标识
DOI:10.1103/physrevlett.93.096101
摘要
Using the method of Frantz and Salmeron to cleave mica [Tribol. Lett. 5, 151 (1998)] we investigate alkane fluids in a surface forces apparatus and confirm several predictions of molecular dynamics (MD) simulation. An oscillatory force-distance profile is observed for the methyl-branched alkane, squalane. Boundary slip is inferred from the frictional sliding of molecularly thin fluids and also from the hydrodynamic flow of thicker films. These findings resolve the paradox that prior experiments disagreed with these aspects of MD predictions, and demonstrate that exceptionally low energy dissipation is possible when fluids move past solid surfaces that are sufficiently smooth.
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