Critical length of nanowires for hydrophobic behavior

被引:35
作者
Cheng, YH [1 ]
Chou, CK
Chih, C
Cheng, SY
机构
[1] Ind Technol Res Inst, Mat Res Labs, Mito, Ibaraki 310, Japan
[2] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan
关键词
D O I
10.1016/j.cplett.2004.08.063
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This Letter investigates the wetting behavior on surface with well-controlled nanoscale structure. Water and water-alcohol droplets were brought to contact the surface electroplated by Ag nanowires. It is found that hydrophobic behavior becomes more pronounced as the length of the nanowires increases. A critical length of approximately 100 nm is observed, beyond which the contact angle approaches a steady value of 130degrees. In addition, the contact angle of water levels off around 160degrees when the length of the fluorine-coated Ag nanowires exceeds the critical value of 100 nm. The mechanism of the hydrophobic behavior on surface with nanoscale structure is proposed. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:17 / 20
页数:4
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