| Budget Amount *help |
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2016: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2015: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Fiscal Year 2014: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
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| Outline of Final Research Achievements |
Aiming at establishing thin film lubrication for sliding surfaces separated by a nanoscale gap, we proposed a method to impart fine functional concavo-convex patterns to nanometer-thick liquid films by masked ultraviolet irradiation, and we confirmed its effectiveness. In this research, we improved and added new functions to our previously developed measuring equipment and coarse-grained molecular simulation method. This allowed us to evaluate and analyze tribological properties of nanometer-thick liquid films with high precision. From the results of experiments and simulations, we clarified the effects of pattern shape and dimension on tribological properties of nanometer-thick liquid films. For instance, films patterned orthogonally to the sliding direction exhibit low friction and fast replenishment of depleted portions, as compared with those patterned parallel to the sliding direction. Other important findings were also obtained, helping us to unveil the underlying mechanism.
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