Simple, large-scale patterning of hydrophobic ZnO nanorod arrays.
Here we describe a simple, versatile technique to produce large-scale arrays of highly ordered ZnO nanorods. Patterning of three distinct ZnO crystal morphologies is demonstrated through use of different ZnO seed layers. Array formation is accomplished through a simple variation on nanosphere lithography that imprints a thickness variation across a PMMA mask layer. The area of exposed seed layer is controlled through etching time in an oxygen plasma. Subsequent hydrothermal growth from the patterned seed layer produces high-quality ZnO crystals in uniform arrays. The high uniformity of the patterned array is shown to induce a high contact angle hydrophobic state even without the need for chemical modification of the ZnO surface. This technique provides a straightforward way to integrate the optical and electrical properties of high-quality ZnO nanorods with the tunable fluidic properties at the surface of well-ordered arrays.
Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea.
Seong Been
SB
Kim
Won Woo
WW
Lee
Jaeseok
J
Yi
Won Il
WI
Park
Jin-Sang
JS
Kim
William T
WT
Nichols
D015374:Biosensing Techniques / Q000379:methods*; D003460:Crystallization; D004563:Electrochemistry / Q000379:methods; D004867:Equipment Design; D057927:Hydrophobic and Hydrophilic Interactions; D008422:Materials Testing; D044085:Microfluidics; D036103:Nanotechnology / Q000379:methods; D043942:Nanotubes / Q000737:chemistry; D055095:Optics and Photonics / Q000379:methods; D010100:Oxygen / Q000737:chemistry; D019904:Polymethyl Methacrylate / Q000737:chemistry; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry*
D019904:Polymethyl Methacrylate; D010100:Oxygen; D015034:Zinc Oxide