| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2021: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
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| Outline of Final Research Achievements |
Surface of some animals have microstructures. Cicada is an example of whose wings have an array of piles that are approximately 250 nm in height. Although their heights are not uniform but distributed, the surface is known to show several functions such as anti-reflection, water repellency, and slipping effect. The purpose of the present study is to quantitatively confirm the multifunctionality of the biological irregular surface. We observed the transparent wing of a cicada with an atomic force microscopy to characterize the structural irregularity. We also performed various experiments to characterize the water-repellency and slipping effect. The analysis indicated that the distributed height of the piles causes these effects. We also performed an investigation of colloidal aggregation that are formed from a self-organizing process. The effects of structural irregularities on the optical properties are clarified for some types of the aggregation of the colloidal particles.
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