| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Superhydrophilic and Wetting Behavior of TiO2 Films and their Surface Morphologies |
| WANG Wei1, ZHANG Da-Wei1**, TAO Chun-Xian1, WANG Qi1, WANG Wen-Na1, HUANG Yuan-Shen1, NI Zheng-Ji1, ZHUANG Song-Lin1, LI Hai-Xia2, MEI Ting3 |
1Engineering Research Center of Optical Instrument and System (Ministry of Education), Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093
2Department of Information Science and Technology, Shandong University of Politics Science and Law, Jinan 250014
3Laboratory of Nanophotonic Functional Materials and Devices, Institute of Optoelectronic Materials and Technology, South China Normal University, Guangzhou 510631 |
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Abstract TiO2 films, showing superhydrophilic behavior, are prepared by electron beam evaporation. Atomic force microscopy and the contact angle measurement were performed to characterize the morphology and wetting behavior of the TiO2 films. Most studies attribute the wetting behavior of TiO2 surfaces to their physical characteristics rather than surface chemistry. These physical characteristics include surface morphology, roughness, and agglomerate size. We arrange these parameters in order of effectiveness. Surface morphologies are demonstrated to be the most important. TiO2 films with particular morphologies show superhydrophilic behavior without external stimuli, and these thin films also show stable anti-contamination properties during cyclical wetting and drying.
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Received: 16 February 2012
Published: 31 July 2012
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| PACS: |
81.05.Rm
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(Porous materials; granular materials)
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81.40.Ef
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(Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization)
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68.60.Wm
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(Other nonelectronic physical properties)
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