Superhydrophobic Graphene/Nafion Nanohybrid Films with Hierarchical Roughness

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• 作者：Bong Gill Choi ; Ho Seok Park
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：February 9, 2012
• 年：2012
• 卷：116
• 期：5
• 页码：3207-3211
• 全文大小：268K
• 年卷期：v.116,no.5(February 9, 2012)
• ISSN：1932-7455

文摘

The micro- and macroscopic structures of functional films strongly influence the critical properties, such as superhydrophobicity, which exhibits super water repellency with a water contact angle (CA) larger than 150掳 for self-cleaning and antimicrobial surfaces. However, it is difficult to achieve the structural hierarchy of two-dimensional graphene for superhydrophobicity. Herein, we report the fabrication of superhydrophobic graphene/Nafion nanohybrid films by controlling the structures with respect to the chemical composition from an interpenetrating networked and compactly interlocked structure (surface area of 9.56 m² g^鈥?) to the hierarchical petal-like, porous structure (surface area of 413.46 m² g^鈥?). The superhydrophobicity of hybrid thin films with a CA of 161掳 was derived from the petal-like structure with hierarchical roughness, where microscale roughness was produced in the lateral direction of hybrid sheets while nanoscopic roughness was created on the edges of hybrid sheets. Furthermore, the wettability and optical and electrical properties of hybrid thin films can be controlled by manipulating the micro- and macroscale structures through the composition-dependent structural changes.