期刊
APPLIED SURFACE SCIENCE
卷 347, 期 -, 页码 839-848出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.04.163
关键词
ZnO nanorods; Self-cleaning behaviour; Static contact angle; Roll-off angle; Contact angle hysteresis
类别
资金
- Department of Science and Technology-Science and Engineering Research Board, Government of India [SR/S2/JCB-58/2011]
A ZnO nanorods based superhydrophobic surface with extremely low roll-off angle is fabricated using a two-step solution based approach-Successive Ionic Layer Adsorption and Reaction (SILAR) and Chemical Bath Deposition (CBD). The grown ZnO nanorods have average diameter of 285 nm with a predominant growth direction of [002]. The static contact angle of ZnO nanorods superhydrophobic surface is 155 degrees, and the dynamic contact angles contact angle hysteresis and roll-off angle is 2 degrees and 1 degrees, respectively. Furthermore, to comprehend the mechanism governing the extremely low roll-off angle of ZnO nanorods based superhydrophobic surface, an analytical model has been developed by incorporating the topographical (diameter, density of nanorods and solid area fraction) and droplet parameters (surface tension, mass and volume). The theoretically calculated roll-off angle closely matches with the experimental results and reported results. (C) 2015 Elsevier B.V. All rights reserved.
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