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Light-induced reversible hydrophilicity of ZnO structures grown by aqueous chemical growth |
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| Authors: | G Kenanakis E Stratakis K Vlachou E Koudoumas N Katsarakis |
| Institution: | a Center of Materials Technology and Laser, School of Applied Technology, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece b University of Crete, Department of Chemistry, 710 03 Heraklion, Crete, Greece c Science Department, School of Applied Technology, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece d Electrical Engineering Department, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece e Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, P.O. Box 1527, Vassilika Vouton, 711 10 Heraklion, Crete, Greece f University of Crete, Department of Materials Science and Technology, 710 03 Heraklion, Crete, Greece |
| Abstract: | ZnO wurtzite microrods and flowerlike structures were deposited on glass and ITO substrates by the aqueous chemical growth (ACG) technique at mild temperature (95 °C). Wettability studies revealed that the as-deposited structures are hydrophilic and super-hydrophilic for short and long growth times, respectively. The hydrophilic ZnO surfaces could be reversibly switched to super-hydrophilic by alternation of UV illumination and dark storage. Our results demonstrate that ACG at low temperatures can be efficiently employed to deposit transparent photosensitive ZnO structures exhibiting reversible wettability changes. |
| Keywords: | ZnO Microstructures Aqueous chemical growth Wettability |
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