arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0708.2264cond-mat.mtrl-sci
收藏

随机粗糙度对金属表面毛细凝聚粘附力的影响

Influence of random roughness on the adhesion between metal surfaces due to capillary condensation

P. J. van Zwol, G. Palasantzas, J. Th. M. De Hosson

摘要:

用原子力显微镜测量了安装在悬臂梁上的镀金球体与不同粗糙度的金表面之间的毛细作用力。对于光滑表面,毛细粘附力的大小超过任何色散,例如范德华力/卡西米尔力和/或静电力。通过在1-10 nm之间增加几个纳米的粗糙度幅度,观察到毛细作用力的大幅降低。从这些测量可以定义两个极限:一个光滑的极限,其中一个紧密的宏观尺寸的接触表面通过毛细作用力相互作用,和粗糙的极限,其中只有少数粗糙的毛细贡献。

英文摘要:

The capillary force was measured by atomic force microscopy between a gold coated sphere mounted on a cantilever and gold surfaces with different roughness. For smooth surfaces the capillary adhesive force surpasses in magnitude any dispersion, e.g. van der Waals/Casimir, and/or electrostatic forces. A substantial decrease in the capillary force was observed by increasing the roughness ampltitude a few nanometers between 1-10 nm. From these measurements two limits can be defined: a smooth limit where a closely macroscopic size contact surface interacts through the capillary force, and the rough limit where only a few asperities give a capillary contribution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑