Antireflection and Self-Cleaning Properties of a Moth-Eye-Like Surface Coated with TiO2 Particles

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• 作者：Kazuya Nakata ; Munetoshi Sakai ; Tsuyoshi Ochiai ; Taketoshi Murakami ; Katsuhiko Takagi ; Akira Fujishima
• 刊名：Langmuir
• 出版年：2011
• 出版时间：April 5, 2011
• 年：2011
• 卷：27
• 期：7
• 页码：3275-3278
• 全文大小：834K
• 年卷期：v.27,no.7(April 5, 2011)
• ISSN：1520-5827

文摘

Poly(ethylene terephthalate) (PET) films with a moth-eye-like surface are coated with TiO₂ particles to form self-cleaning antireflective films. The use of a TiO₂ suspension of high concentration to coat the PET surface produces a thicker TiO₂ layer with smaller pores, whereas a low concentration of a TiO₂ suspension gives a thinner layer of TiO₂ with larger pores. The PET films coated with TiO₂ particles exhibit a high transmittance of 76鈭?5% and almost no absorption in the range of 400鈭?00 nm. The PET films coated with a TiO₂ suspension with a concentration of 鈮? vol % exhibit superhydrophilicity after irradiation with UV light. After irradiation, the superhydrophilic nature is retained for at least 18 days. The TiO₂-coated PET films showed the ability to decompose methylene blue under UV irradiation.