Title :
Measurement of disjoining pressure of a molecularly thin lubricant film by using a microfabricated groove
Author :
Fukuzawa, K. ; Kawamura, J. ; Deguchi, T. ; Zhang, H. ; Mitsuya, Y.
Author_Institution :
Sch. of Eng., Nagoya Univ., Japan
fDate :
7/1/2004 12:00:00 AM
Abstract :
A new method for measuring disjoining pressure of molecularly thin lubricant film with a microfabricated groove has been developed. The shape of the meniscus of a thin film in the groove was measured by atomic force microscopy, and the disjoining pressure was obtained from the Laplace pressure obtained from the curvature of the meniscus. The result obtained experimentally for a perfluoropolyether lubricant on a silicon surface agrees well with that predicted theoretically for an apolar polymer liquid. Moreover, we have demonstrated the intermolecular interaction between a thin film and a solid surface can be investigated by the method.
Keywords :
atomic force microscopy; hard discs; liquid films; lubricants; nanotechnology; polymer films; pressure measurement; thin films; tribology; Laplace pressure; Si; apolar polymer liquid; atomic force microscopy; disjoining pressure measurement; hard disk drive; head-disk interface; meniscus curvature; meniscus shape measurement; microfabricated groove; molecularly thin lubricant film; nanotribology; perfluoropolyether lubricant; silicon surface; Atomic force microscopy; Atomic measurements; Force measurement; Lubricants; Magnetic films; Magnetic recording; Polymer films; Pressure measurement; Solids; Transistors; Disjoining pressure; Laplace pressure; hard disk drive; head–disk interface; lubricant; nanotribology;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.830237
