Facile method to fabricate raspberry-like particulate films for superhydrophobic surfaces |
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Authors: | Tsai Hui-Jung Lee Yuh-Lang |
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Institution: | Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan. |
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Abstract: | A facile method using layer-by-layer assembly of silica particles is proposed to prepare raspberry-like particulate films for the fabrication of superhydrophobic surfaces. Silica particles 0.5 microm in diameter were used to prepare a surface with a microscale roughness. Nanosized silica particles were then assembled on the particulate film to construct a finer structure on top of the coarse one. After surface modification with dodecyltrichlorosilane, the advancing and receding contact angles of water on the dual-sized structured surface were 169 and 165 degrees , respectively. The scale ratio of the micro/nano surface structure and the regularity of the particulate films on the superhydrophobic surface performance are discussed. |
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