抄録
Surface design is important when designing micro/nano-scale devices as their function and performance are largely determined by the surface properties of adhesion, friction, wear, and wettability, etc. For the purpose of surface design, we have developed a method to pattern molecularly thin liquid lubricant films coated on solid surfaces with ultraviolet irradiation through a photomask. To investigate the effect of patterning on depletion and replenishment properties of lubricant films, we performed pin-on-disk type wear tests for patterned 2.0-nm-thick perfluoropolyether Zdo14000 films coated on magnetic disk surfaces. The pattern shape included radial, circumferential, and dotted ones, and the pattern linewidth included 0.5, 5, and 10μm. We found that the depletion and replenishment properties were mainly affected by pattern linewidth and pattern shape, respectively. The 0.5-μm patterned films showed lower depletion than the 5 and 10-μm patterned films, and the radial-patterned films showed faster replenishment than the circumferential-patterned films.
