Accession Number : ADA607585


Title :   Superhydrophobicity of Hierarchical and ZNO Nanowire Coatings


Descriptive Note : Interim rept. 21 Dec 2010-17 Dec 2013


Corporate Author : AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE


Personal Author(s) : Mou, Shin ; Gong, Maogang ; Jasion, Daniel ; Ren, Shenqiang ; Yang, Zhou ; Xu, Xiaoliang ; Zhang, Hongdi ; Long, Yunze


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a607585.pdf


Report Date : Jan 2014


Pagination or Media Count : 9


Abstract : Hierarchical superhydrophobic surfaces were constructed by growing various lengths of ZnO nanowires on microscale Si pyramids produced by chemical etching. The nano-size effect on wettability of nano/micro complex structures has been investigated by adjusting the ZnO nanowire length. As the nanowire length on the Si pyramid surface increases, a transition from the Wenzel state to the Cassie state occurs. A water contact angle as high as 169.1 , with a contact angle hysteresis less than 1.3 , was formed by growing ZnO nanowires of a suitable length on Si micro-pyramids. Compression and impact experiments further demonstrate the robust superhydrophobicity of ZnO nanowire Si pyramid hierarchical structures.


Descriptors :   *COATINGS , *NANOWIRES , ELECTROOPTICS , HYDROPHOBIC PROPERTIES , MOLECULAR ELECTRONICS , NANOPARTICLES , QUANTUM DOTS , REPRINTS


Subject Categories : Electrical and Electronic Equipment
      Coatings, Colorants and Finishes


Distribution Statement : APPROVED FOR PUBLIC RELEASE