Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Change in Water Contact Angle of Carbon Contaminated TiO2 Surfaces by High-energy Electron Beam

  • Kim, Kwang-Dae (Department of Chemistry, Sungkyunkwan University) ;
  • Tai, Wei Sheng (Department of Chemistry, Sungkyunkwan University) ;
  • Kim, Young-Dok (Department of Chemistry, Sungkyunkwan University) ;
  • Cho, Sang-Jin (Department of Chemistry, Sungkyunkwan University) ;
  • Bae, In-Seob (Department of Chemistry, Sungkyunkwan University) ;
  • Boo, Jin-Hyo (Department of Chemistry, Sungkyunkwan University) ;
  • Lee, Byung-Cheol (Quantum Optics Research Division, Korea Atomic Energy Research Institute) ;
  • Yang, Ki-Ho (Quantum Optics Research Division, Korea Atomic Energy Research Institute) ;
  • Pack, Ok-Kyung (Quantum Optics Research Division, Korea Atomic Energy Research Institute)
  • Published : 2009.05.20
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Abstract

We studied change in water contact angle on $TiO_2$ surfaces upon high-energy electron-beam treatment. Depending on conditions of e-beam exposures, surface OH-content could be increased or decreased. In contrast, water contact angle continuously decreased with increasing e-beam exposure and energy, i.e. change in the water contact angle cannot be rationalized in terms of the overall change in the surfacestructure of carbon-contaminated $TiO_2$. In the C 1s spectra, we found that the C-O and C=O contents gradually increased with increasing e-beam energy, suggesting that the change in the surface structure of carbon layers can be important for understanding of the wettability change. Our results imply that the degree of oxidation of carbon impurity layers on oxide surfaces should be considered, in order to fully understand the change in the oxide surface wettability.

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References

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