DocumentCode :
1311048
Title :
Effect of Ultraviolet Irradiation on Adhesion of Nanometer-Thick Lubricant Films Coated on Magnetic Disk Surfaces
Author :
Zhang, Hedong ; Takimoto, Taiki ; Fukuzawa, Kenji ; Itoh, Shintaro
Author_Institution :
Grad. Sch. of Inf. Sci., Nagoya Univ., Nagoya, Japan
Volume :
47
Issue :
1
fYear :
2011
Firstpage :
94
Lastpage :
99
Abstract :
By measuring force-distance curves with an environmental scanning probe microscope (SPM), we quantitatively evaluated the effect of ultraviolet (UV) irradiation on the adhesive properties of nanometer-thick perfluoropolyether (PFPE) Z03 films coated on magnetic disks. The experimental results indicated that UV irradiation shows negligible influence on the adhesion of the disk surface and on the adhesion of the mobile fraction contained in the UV-irradiated Z03 films. The effect of UV irradiation on the adhesion of Z03 films is essentially achieved by its effect that improves the bonding of the Z03 molecules to the disk surfaces. As the bonding ratio increased with UV irradiation, the adhesive force measured on the 2-nm-thick PFPE Z03 films initially decreased, but it increased after reaching a minimum at a bonding ratio of about 0.6. This is possibly attributed to the increase of the meniscus force caused by decreased mobile lubricant thickness and the decrease of the van der Waals force between the SPM probe and the sample surfaces caused by increased bonded lubricant thickness.
Keywords :
adhesion; discs (structures); lubricants; magnetic disc storage; magnetic recording; polymer films; scanning probe microscopy; thin films; ultraviolet radiation effects; van der Waals forces; SPM probe; Z03 molecules; adhesion; adhesive force; bonded lubricant thickness; bonding; bonding ratio; disk surface; environmental scanning probe microscope; force-distance curves; magnetic disk surfaces; meniscus force; mobile lubricant thickness; nanometer-thick lubricant films; nanometer-thick perfluoropolyether Z03 films; size 2 nm; ultraviolet irradiation effects; van der Waals force; Bonding; Films; Force; Lubricants; Mobile communication; Probes; Radiation effects; Adhesion; magnetic disk recording; thin films; ultraviolet irradiation;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2010.2068281
Filename :
5560852
Link To Document :
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