Interfacial friction of submonolayer helium films adsorbed on the surface of graphite
Interfacial friction of submonolayer helium films adsorbed on the surface of graphite
复制标题
石墨表面吸附亚单层氦膜的界面摩擦
DOI：
10.1007/bf00753341
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发表时间：
1995
影响因子：
2
通讯作者：
J. Saunders
中科院分区：
文献类型：
--
作者：
P. Mohandas;C. P. Lusher;V. Mikheev;B. Cowan;J. Saunders
在50mK ~ 2K的温度范围内，以石墨为衬底，用扭振法研究了吸附氦膜与石墨表面的摩擦耦合。随着温度的降低，所观察到的周期位移与薄膜与衬底的去耦一致，并且伴随着最大的耗散。在注册表以下的覆盖区域和不相称的固体区域，数据可以用热激活松弛时间的德拜关系很好地描述。这将对应于固体单层的界面摩擦在T→0时消失。在覆盖层0.064Å2and 0.08Å-2a之间观察到双峰结构的耗散。这些结果与Krim等人的工作有关，他们使用石英微天平研究了吸附单层的“纳米摩擦学”。在目前的工作中，石墨衬底的使用提供了在具有丰富且表征良好的亚单层相图的系统上研究这些效应的可能性。
The frictional coupling between an adsorbed helium film and the surface of graphite has been studied using torsional oscillator methods and exfoliated graphite as a substrate, in the temperature range 50mK to 2K. The observed period shift is consistent with the film decoupling from the substrate as the temperature is reduced, and is accompanied by a maximum in dissipation. At coverages below registry and in the incommensurate solid region the data are well described by Debye relations with a thermally activated relaxation time. This would correspond to a vanishing of the interfacial friction for the solid monolayer as T -→ 0. At coverages between 0.064Å2and 0.08Å-2a double peaked structure in the dissipation is observed. The results relate to the work of Krim et al.1who have used a quartz microbalance to study the “nanotribology” of adsorbed monolayers. In the present work the use of the graphite substrate offers the possibility of studying these effects on a system with a rich and well characterised submonolayer phase diagram.
DOI：
10.1007/978-1-4684-5970-8
发表时间：
1991
期刊：
--
影响因子：
--
作者：
H. Taub
通讯作者：
H. Taub