Fractal Surfaces of Molecular Crystals Mimicking Lotus Leaf with Phototunable Double Roughness Structures

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• 作者：Ryo Nishimura ; Kengo Hyodo ; Haruna Sawaguchi ; Yoshiaki Yamamoto ; Yoshimune Nonomura ; Hiroyuki Mayama ; Satoshi Yokojima ; Shinichiro Nakamura ; Kingo Uchida
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：August 17, 2016
• 年：2016
• 卷：138
• 期：32
• 页码：10299-10303
• 全文大小：405K
• 年卷期：0
• ISSN：1520-5126

文摘

Double roughness structure, the origin of the lotus effect of natural lotus leaf, was successfully reproduced on a diarylethene microcrystalline surface. Static superwater-repellency and dynamic water-drop-bouncing were observed on the surface, in the manner of natural lotus leaves. Double roughness structure was essential for water-drop-bouncing. This ability was not observed on a single roughness microcrystalline surface showing the lotus effect of the same diarylethene derivative. The double roughness structure was reversibly controlled by alternating irradiation with UV and visible light.