Application of Click Chemistry in the Fabrication of Cactus-Like Hierarchical Particulates for Sticky Superhydrophobic Surfaces

作者：Peng, Jinyang; Yu, Puren; Zeng, Songjun; Liu, Xi; Chen, Junren; Xu, Weijian^*

来源：Journal of Physical Chemistry C, 2010, 114(13): 5926-5931.

DOI：10.1021/jp909430z

In this article, cactus-like hierarchical structures were fabricated via click chemistry of azide-alkyne 1,3-dipolar Huisgen cycloaddition reaction. It is convenient to control the size of hierarchical particulates and to tune their surface roughness by adjusting the cycles of the click reaction. Dual-sized surface roughness, which biomimics the surface topology of sticky superhydrophobic gecko feet, originates from well-defined silica-based cactus-like particulates that are covalent, bonded to an alkynyl-treated substrate. After surface modification with fluorinated azobenzene, the resulting hairy hierarchical structure coatings show the static water contact angle as high as 151.6 +/- 1.5 degrees, high adhesion to water, and outstanding chemical stability. We believe that the densely packed nanoscale aggregates are the key contributors to the observed high adhesion, presumably by generating, large van der Waals' forces from the large surface area in very close contact with water.

• 出版日期2010-4-8
• 单位湖南大学