Photoinduced Formation of Superhydrophobic Surface on Which Contact Angle of a Water Droplet Exceeds 170掳 by Reversible Topographical Changes on a Diarylethene Microcrystalline Surface

详细信息    查看全文

• 作者：Naoki Nishikawa ; Hiroyuki Kiyohara ; Shingo Sakiyama ; Seiji Yamazoe ; Hiroyuki Mayama ; Tsuyoshi Tsujioka ; Yuko Kojima ; Satoshi Yokojima ; Shinichiro Nakamura ; Kingo Uchida
• 刊名：Langmuir
• 出版年：2012
• 出版时间：December 21, 2012
• 年：2012
• 卷：28
• 期：51
• 页码：17817-17824
• 全文大小：481K
• 年卷期：v.28,no.51(December 21, 2012)
• ISSN：1520-5827

文摘

A superhydrophobic surface on which the contact angle of a water droplet exceeds 170掳 was reversibly produced by alternate irradiation with UV and visible light. Superhydrophobicity is due to the formation of densely generated submicrometer sized needle-shaped crystals (less than 0.2鈥?.3 渭m diameter and 2.2鈥?.5 渭m long) at 30 掳C, which is much lower than the eutectic temperature of either isomers of the diarylethene. Below the eutectic temperature, the generated crystals were much smaller than those generated above the eutectic temperature. These smaller crystals more effectively enhanced the superhydrophobicity.