title: Biomimetic hierarchical ZnO structure with superhydrophobic and antireflective properties.
abstract: A two step method, with a combination of top-down and bottom-up approaches, was developed for the fabrication of ZnO based hierarchical structures with nanorods on microcraters. A layer of well c-axis aligned, transparent, conductive ZnO thin film was deposited by pulsed DC sputtering on a Corning glass substrate. The microcraters were created with anisotropic etching on the as-deposited ZnO thin film. ZnO nanorods were then synthesized onto the etched film by means of metal organic chemical vapor deposition. The resulting hierarchical film exhibits a high water contact angle (>160 degrees) with a low contact angle hysteresis (2 degrees) and low reflection over a wide spectral range. This biomimetic material may find potential applications in many industrial fields, e.g., self-cleaning, solar cells, displays.
authors.affiliation: Information and Electronic Materials Research Laboratory, Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-Dong, Seoul 120-749, Republic of Korea.
authors.forename: Junjie
authors.initials: J
authors.lastname: Xiong
authors.forename: Sachindra Nath
authors.initials: SN
authors.lastname: Das
authors.forename: Beomki
authors.initials: B
authors.lastname: Shin
authors.forename: Jyoti Prakash
authors.initials: JP
authors.lastname: Kar
authors.forename: Ji Hyuk
authors.initials: JH
authors.lastname: Choi
authors.forename: Jae-Min
authors.initials: JM
authors.lastname: Myoung
mesh_terms: D040761:Biomimetic Materials / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D049329:Nanostructures / Q000737:chemistry*; D013499:Surface Properties; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D015034:Zinc Oxide