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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 5
BKCSDE 30(5)
May 20, 2009

Title	Change in Water Contact Angle of Carbon Contaminated TiO₂ Surfaces by High-energy Electron Beam
Author	Kwang Dae Kim, Wei Sheng Tai, Young Dok Kim*, Sang Jin Cho, In Seob Bae, Jin Hyo Boo, Byung Cheol Lee, Ki Ho Yang, Ok Kyung Park
Keywords	Electron beam, TiO₂, Water contact angle
Abstract	We studied change in water contact angle on TiO₂ 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 TiO₂. 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.
Page	1067 - 1070
Full Text	PDF

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