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Open AccessArticle

Biomimetic Superhydrophobic Hollowed-Out Pyramid Surface Based on Self-Assembly

1
College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China
2
QuantumCTeK Co., Ltd., Hefei 230031, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(5), 813; https://doi.org/10.3390/ma11050813
Received: 31 March 2018 / Revised: 10 May 2018 / Accepted: 14 May 2018 / Published: 16 May 2018
(This article belongs to the Special Issue Self-Cleaning Surfaces)
In this paper, we present a periodic hollowed-out pyramid microstructure with excellent superhydrophobicity. In our approach, T-topping pillars and capillary-induced self-assembly methods were combined with the photolithography process to fabricate a hollowed-out pyramid structure. First, a wideband ultraviolet source without a filter was used to fabricate the T-topping pillars during the exposure process; then, the evaporation-induced assembly collapsed the pillars and formed the hollowed-out pyramid structure. Scanning electron microscopy images showed the microstructures of the prepared surface. The contact angle of the surface was 154°. The surface showed excellent high temperature and ultraviolet irradiation tolerance, and the contact angle of the surface barely changed when the temperature dropped. This excellent environmental durability of our superhydrophobic surface has potential applications for self-cleaning and friction drag reduction under water. View Full-Text
Keywords: superhydrophobic; biomimetic; self-assembly; SU-8 photoresist superhydrophobic; biomimetic; self-assembly; SU-8 photoresist
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MDPI and ACS Style

Luo, W.; Yu, B.; Xiao, D.; Zhang, M.; Wu, X.; Li, G. Biomimetic Superhydrophobic Hollowed-Out Pyramid Surface Based on Self-Assembly. Materials 2018, 11, 813.

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