Open AccessTwo-step growth of superhydrophobic ZnO nanorod array films
Author(s) -
Gong Mao-Gang,
Xu Xiao-Liang,
Cao Zi-Li,
Yuanyue Liu,
Zhu Hai-Ming
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.1885
Subject(s) - nanorod , materials science , contact angle , scanning electron microscope , sputter deposition , substrate (aquarium) , nanotechnology , layer (electronics) , deposition (geology) , thin film , phase (matter) , chemical engineering , sputtering , optoelectronics , composite material , chemistry , paleontology , oceanography , organic chemistry , sediment , engineering , geology , biology
Well-aligned ZnO nanorod array films (ZnO-NAFs) were coatedon common glass substrate by two-step method. A thin buffer layer of ZnO seeds were first deposited via RF magnetron sputtering,the ZnO-NAFS were then grown in a simple aqueous solution. We report a surface-modification induced hydrophilicity to superhydrophobicity transiton on ZnO-NAFs. The sample was characterized by scanning electron microscopy (SEM). The surfaces of ZnO-NAFs was superhydrophobic with a three-phase contact angle of 151°±0.5°, while the sliding angle is 7°. The superhydrophobicity of ZnO-NAFs was validated by Cassie's model.