Water Droplet Bouncing and Superhydrophobicity Induced by Multiscale Hierarchical Nanostructures
详细信息 查看全文
- 作者：Doo Jin Lee ; Hyung Min Kim ; Young Seok Song ; Jae Ryoun Youn
- 刊名：ACS Nano
- 出版年：2012
- 出版时间：September 25, 2012
- 年：2012
- 卷：6
- 期：9
- 页码：7656-7664
- 全文大小：620K
- 年卷期：v.6,no.9(September 25, 2012)
- ISSN：1936-086X
文摘
Superhydrophobicity of multiscale hierarchical structures and bouncing phenomenon of a water droplet on the superhydrophobic surface were studied. The multiscale hierarchical structures of carbon nanotube/ZnO and ZnO/carbon nanofiber were produced by the hydrothermal method. The multiscale hierarchical structure showed superhydrophobicity with a static contact angle (CA) larger than 160掳 due to increased air pockets in the Cassie鈥揃axter state. The water bouncing effect observed on the multiscale hierarchical nanostructure was explained by the free energy barrier (FEB) analysis and finite element simulation. The multiscale hierarchical nanostructure showed low FEBs which provoke high CA and bouncing phenomenon due to small energy dissipation toward receding and advancing directions.