Bonding Mechanism of Perfluoropolyether Lubricant Film with Functional Endgroup on Magnetic Disks by Ultraviolet Irradiation

2011 ◽  
Vol 45 (1) ◽  
pp. 117-122 ◽  
Author(s):  
H. Tani ◽  
H. Kitagawa ◽  
N. Tagawa
Keyword(s):  
Ultraviolet Irradiation ◽  
Lubricant Film ◽  
Bonding Mechanism ◽  
Magnetic Disks ◽  
Perfluoropolyether Lubricant

scholarly journals Dependence of Pin Surface Roughness for Friction Forces of Ultrathin Perfluoropolyether Lubricant Film on Magnetic Disks by Pin-on-Disk Test

2012 ◽  
Vol 2012 ◽  
pp. 1-7
Author(s):  
H. Tani ◽  
Y. Mitsuya ◽  
T. Kitagawa ◽  
N. Tagawa
Keyword(s):  
Surface Roughness ◽  
Ion Beam ◽  
Lubricant Film ◽  
Friction Forces ◽  
Magnetic Disks ◽  
End Groups ◽  
Cluster Ion ◽  
Perfluoropolyether Lubricant ◽  
Gas Cluster Ion Beam ◽  
Pin On Disk

We fabricated supersmooth probes for use in pin-on-disk sliding tests by applying gas cluster ion beam irradiation to glass convex lenses. In the fabrication process, various changes were made to the irradiation conditions; these included one-step irradiation of Ar clusters or two-step irradiation of Ar and N2clusters, with or without Ar cluster-assisted tough carbon deposition prior to N2irradiation, and the application of various ion doses onto the surface. We successfully obtained probes with a centerline averaged surface roughness that ranged widely from 1.08 to 4.30 nm. Using these probes, we measured the friction forces exerted on magnetic disks coated with a molecularly thin lubricant film. Perfluoropolyether lubricant films with different numbers of hydroxyl end groups were compared, and our results indicated that the friction force increases as the surface roughness of the pin decreases and that increases as the number of hydroxyl end groups increases.

scholarly journals Electric-Field-Assisted Dip-Coating for Ultra-Thin PFPE Lubricant Film on Magnetic Disks - Molecular Conformation Change by Electric Field -

2011 ◽  
Vol 6 (1) ◽  
pp. 40-44
Author(s):  
Hiroshi Tani ◽  
Masami Kubota ◽  
Masayuki Kanda ◽  
Motohiro Terao ◽  
Norio Tagawa
Keyword(s):  
Electric Field ◽  
Molecular Conformation ◽  
Dip Coating ◽  
Lubricant Film ◽  
Conformation Change ◽  
Magnetic Disks ◽  
Pfpe Lubricant

Effect of Ultraviolet Irradiation on the Interactions between Perfluoropolyether Lubricant and Magnetic Disk Surfaces

2005 ◽  
Vol 20 (3-4) ◽  
pp. 191-199 ◽  
Author(s):  
H. Zhang ◽  
Y. Mitsuya ◽  
M. Imamura ◽  
N. Fukuoka ◽  
K. Fukuzawa
Keyword(s):  
Ultraviolet Irradiation ◽  
Magnetic Disk ◽  
Perfluoropolyether Lubricant

Pulsed UV-laser-induced chemistry of perfluoropolyether lubricant film

2002 ◽  
Vol 75 (5) ◽  
pp. 633-636 ◽  
Author(s):  
L. Zhu ◽  
T. Liew ◽  
T.C. Chong
Keyword(s):  
Lubricant Film ◽  
Uv Laser ◽  
Perfluoropolyether Lubricant

Influence of lubricant film on magnetic disks for smear accumulation on head slider surface by laser irradiation

2017 ◽  
Vol 2017 (0) ◽  
pp. S1610104
Author(s):  
Yuki UESARAIE ◽  
Hiroshi TANI ◽  
Renguo LU ◽  
Shinji KOGANEZAWA ◽  
Norio TAGAWA
Keyword(s):  
Laser Irradiation ◽  
Lubricant Film ◽  
Magnetic Disks ◽  
Head Slider ◽  
Slider Surface

Culturing and Bonding of Diatom on a Microfluidic Chip for Biosensing Application

2013 ◽  
Vol 461 ◽  
pp. 809-813 ◽  
Author(s):  
Jun Cai ◽  
Jun Feng Pan ◽  
Ming Li Chen ◽  
Yu Wang ◽  
De Yuan Zhang
Keyword(s):  
Organic Matter ◽  
Fluorescence Intensity ◽  
Microfluidic Chip ◽  
Ultraviolet Irradiation ◽  
High Sensitivity ◽  
Bonding Mechanism

In order to fabricate biosensors with high sensitivity, the diatom Coscinodiscus excentricus was cultured on a microfluidic chip made with polydimethylsiloxane (PDMS), then the organic matter of diatom cells was removed and only diatom frustules were left, after which the cleaned frustules were bonded onto the bottom of the PDMS micro chamber by ultraviolet irradiation. The overview and the detailed morphology of the frustules in the chamber were analyzed by SEM, and the ultraviolet irradiation bonding mechanism of diatom with PDMS was discussed. Finally, the diatom based microfluidic chip was tested with the fluorescein-labeled protein; and the result showed that the fluorescence intensity of the diatom is 4 times stronger compared with that of the blank regions.

scholarly journals Electric Field Assisted Dip-coating Process of Ultra-thin PFPE Lubricant Film on Magnetic Disks

2010 ◽  
Vol 4 (1) ◽  
pp. 397-404 ◽  
Author(s):  
Hiroshi TANI ◽  
Masami KUBOTA ◽  
Masayuki KANDA ◽  
Motohiro TERAO ◽  
Norio TAGAWA
Keyword(s):  
Electric Field ◽  
Dip Coating ◽  
Lubricant Film ◽  
Coating Process ◽  
Magnetic Disks ◽  
Pfpe Lubricant
Sign in / Sign up

Export Citation Format

Share Document