Author: Park, Y.D.
Paper Title Page
TH1PB04 Fabrication of Hydrophobic Surfaces from Hydrophilic BeO by Alpha-Irradiation-Induced Nuclear Transmutation 443
  • E.J. Lee, M.G. Hur, J.H. Park
    KAERI, Daejon, Republic of Korea
  • Y.B. Kong, Y.D. Park, J.M. Son, S.D. Yang
    Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongup-si, Jeollabuk-do, Republic of Korea
  Hydrophobic surfaces were simply fabricated by irradiating hydrophilic BeO surfaces with an alpha particle beam from a cyclotron. In this research, BeO disks were irradiated under conditions of ~25 MeV in alpha particle energy and ~1 μA in beam current with different irradiation time. After the alpha irradiation, the changes in the morphology and chemical composition of BeO surfaces were analyzed using a field emission scanning electron microscopy (FESEM) and X-ray photoelectron spectroscopy (XPS). The wetting property of alpha-irradiated BeO surfaces is analyzed by measuring water contact angles (CAs). C and F atoms were created, and consequently, hydrophobic CFx functional groups were formed by the alpha irradiation of hydrophilic BeO. The amount of CFx functional groups on the surface increases as the irradiation time increases. In addition, the surface roughening, which also affects the surface wettability, was induced by the alpha irradiation. Accordingly, the CA of alpha-irradiated BeO surfaces gradually increases as the irradiation time increases. In conclusion, hydrophilic BeO surfaces could be easily converted to hydrophobic surfaces by the alpha irradiation.  
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