What is the behavior that molecules of fluids show in the vicinity of a solid surface? How does fluid behave itself when it is trapped by solid surfaces put very close to each other? These problems are of physical interest and are disputed by many researchers [1-4]. The results show that such liquid properties can differ significantly from bulk properties. Specific properties of ultrathin films of such fluids have not been considered as very important so far in such fields as engineering and manufacturing industry, but with the miniaturization of machine parts that followed after the development of the mechanical engineering in recent years, which can be exemplified by micromachines, the above problems began to play a very important role. For example, magnetic disk storage devices, which are one of the achievements of micromachine technology, include heads that fly over magnetic disks leaving an extra small gap of 10-19 nanometers and macromolecular fluid lubricant is applied between the head and the disk, the thickness of a lubricating film being 1-2 nm. Thus, ultrathin fluid films are used in fact as they are and knowledge about their properties is important from both the future development of mechanical engineering and the progress of tribology points of view. In the present work, specific features of ultrathin liquid films will be considered.
展开▼
