Fabrication of Hierarchically Structured Porous Films of Metal Oxides and Carbonates Through Coffee Ring Effect

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• 作者：Sachin Khapli^a ; ^{sdk275@nyu.edu" class="auth_mail" title="E-mail the corresponding author} ; Ina Rianasari^a ; Sudhir Sharma^a ; Tom Blanton^b ; Ramesh Jagannathan^a
• 关键词：Hierarchically porous materials ; nanowires ; two-dimensional crystals ; calcium carbonate ; zinc oxide
• 刊名：Materials Today: Proceedings
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：3
• 期：2
• 页码：362-368
• 全文大小：765 K

文摘

We report a versatile method for the fabrication of hierarchically structured porous ceramic films through a non-vacuum, aerosol-based deposition technique. Our method consists of evaporation of CO₂-enriched water microdroplets containing dissolved organic salts and yields a variety of porous scaffolds with micron-sized pores. In addition, the films are characterized by a hierarchy of structural features, such as nanowires, nanorods, 2-dimensional crystals, or nanopores. This scalable, environment-friendly method is applicable to a wide variety of ceramic materials and can lead to materials with an improved performance in catalysis, sensors, solar cells, fuel cells, and tissue engineering.