TY - JOUR
T1 - Hydrophobic/hydrophilic switching on zinc oxide micro-textured surface
AU - Myint, Myo Tay Zar
AU - Kumar, Nithin Senthur
AU - Hornyak, Gabor Louis
AU - Dutta, Joydeep
N1 - Funding Information:
The authors would like to acknowledge partial financial support from the National Nanotechnology Center of the National Science and Technology Development Agency (NSTDA) , Ministry of Science and Technology (MOST), Thailand and the Centre of Excellence in Nanotechnology at the Asian Institute of Technology, Thailand , and Sheikh Saqr Al Qasimi Graduate Research Fellowship , United Arab Emirates.
PY - 2013/1/1
Y1 - 2013/1/1
N2 - Switchable wettability of zinc oxide (ZnO) microrod coated surfaces was controlled in two different ways: (1) by physical geometry (surface coverage area S A : the area covered by solid) and (2) by irradiation with ultraviolet (UV) light followed by infrared (IR) or furnace heating. In the first approach, the threshold coverage area for achieving hydrophobic surfaces was found to be <40%, which is in good agreement with predicted values in the literature leading to a metastable Cassie-Baxter regime. The transformation of hydrophobic to hydrophilic surfaces was studied by alternating cycles of 3 h exposure to ultraviolet (λ peak ∼ 253 nm) light followed by 1 h of annealing or IR irradiation alone. Three different annealing temperatures (120 °C, 200 °C and 250 °C) were utilized. Results of this work can be applied for designing surfaces with controlled wettability.
AB - Switchable wettability of zinc oxide (ZnO) microrod coated surfaces was controlled in two different ways: (1) by physical geometry (surface coverage area S A : the area covered by solid) and (2) by irradiation with ultraviolet (UV) light followed by infrared (IR) or furnace heating. In the first approach, the threshold coverage area for achieving hydrophobic surfaces was found to be <40%, which is in good agreement with predicted values in the literature leading to a metastable Cassie-Baxter regime. The transformation of hydrophobic to hydrophilic surfaces was studied by alternating cycles of 3 h exposure to ultraviolet (λ peak ∼ 253 nm) light followed by 1 h of annealing or IR irradiation alone. Three different annealing temperatures (120 °C, 200 °C and 250 °C) were utilized. Results of this work can be applied for designing surfaces with controlled wettability.
KW - Annealing
KW - Hydrophilic
KW - Hydrophobic
KW - Microrod
KW - Ultraviolet
KW - Zinc oxide
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U2 - 10.1016/j.apsusc.2012.10.024
DO - 10.1016/j.apsusc.2012.10.024
M3 - Article
AN - SCOPUS:84870574517
SN - 0169-4332
VL - 264
SP - 344
EP - 348
JO - Applied Surface Science
JF - Applied Surface Science
ER -