Tunable wettability in surface-modified ZnO-based hierarchical nanostructures

被引：72

作者：

Li, Gongping ^{[1
]}

Chen, Tao ^{[2
]}

Yan, Bin ^{[1
]}

Ma, Yun ^{[1
]}

Zhang, Zhou ^{[1
]}

Yu, Ting ^{[1
]}

Shen, Zexiang ^{[1
]}

Chen, Hongyu ^{[2
]}

Wu, Tom ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore

[2] Nanyang Technol Univ, Sch Phys & Math Sci, Div Chem & Biol Chem, Singapore 637371, Singapore

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 17期

关键词：

D O I：

10.1063/1.2918447

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Designing geometrical structures and making chemical modifications are two effective routes to tailor wettability. ZnO-based hierarchical nanostructures, in particular, vertically aligned nanoneedles and nanonails were employed as a platform to study the effect of surface morphology. The hydrophobicity and the variation of contact angle in the as-grown samples were attributed to the combined effects of surface roughness and partial water-solid contact. Subsequent chemical modifications with stearic acid led to superhydrophobic ZnO surfaces, while annealing in air resulted into superhydrophilicity. Under the alternations of coating and removal of stearic acid, reversible transitions between superhydrophilicity and hydrophobicity were realized. (c) 2008 American Institute of Physics.

引用

页数：3

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