| Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2017: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
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| Outline of Final Research Achievements |
We demonstrated that UV irradiation onto polystyrene (PS) particles with ~200 nm resulted in the formation of a hole below the wavelength of the UV light. Oxygen in the air and hydroxyl radical in water were absolutely crucial for fabricating the hole inside the PS particles. We also demonstrated that (i) the hole formed in the center of PS particles below 250 nm in diameter, while it formed in the bottom of the particles above 300 nm in diameter, (ii) the hole position depended on the refractive index of the atmosphere, (iii) changing the irradiation angle of UV light provided many holes inside each PS particle, and (iv) this UV irradiation technique can be applied for making the hole pattern on PS films. Further, we proved that TEM 3D-tomography technique is very useful to analyze the hole structure inside PS particles and that FDTD simulation can predict the hole position.
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