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

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

3183

Lastpage

3185

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.830237

Filename

1325770