QUARTZ-CRYSTAL MICROBALANCE STUDIES OF THE VELOCITY DEPENDENCE OF INTERFACIAL FRICTION
QUARTZ-CRYSTAL MICROBALANCE STUDIES OF THE VELOCITY DEPENDENCE OF INTERFACIAL FRICTION
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界面摩擦速度依赖性的石英晶体微天平研究
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
J. Krim
中科院分区：
文献类型：
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作者：
C. Mak;J. Krim
我们采用石英晶体微量天平技术来测量当Kr单层吸附在微量天平的金电极上时发生的品质因子漂移的振动振幅依赖性。假设摩擦力与膜相对于其基底的滑动速度的某个幂成比例，这样的测量允许人们推断摩擦力定律在形式上是否是线性的。我们已经观察到线性摩擦定律对于液体和固体氪的完整单层都有效，滑动速度估计在3 - 8 cm/s范围内。在较低覆盖率下的摩擦定律的形式似乎是非线性的，在更一般的定律F}v n中与n，1一致。@S0163-1829~98！01030-3#
We have employed a quartz-crystal microbalance technique to measure the vibrational amplitude dependence of quality factor shifts which occur when Kr monolayers adsorb on the microbalance’s gold electrodes. Assuming that the friction force is proportional to some power of the sliding velocity of the film relative to its substrate, such measurements allow one to infer whether or not the friction force law is linear in form. We have observed a linear friction law to be valid for a full monolayer of both liquid and solid krypton, for sliding speeds estimated to be in the range 3‐8 cm/s. The form of the friction law at lower coverages appears to be nonlinear, consistent with n,1 in a more general law, F}v n . @S0163-1829~98!01030-3#