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1 results

  • Three-Dimensional Lithography for Rutile TiO2 Single Crystals using Swift Heavy Ions

  • Koichi Awazu, Makoto Fujimaki, Yoshimichi Ohki, Tetsuro Komatsubara
  • Journal:
    MRS Online Proceedings Library Archive / Volume 797 / 2003
    Published online by Cambridge University Press:
    01 February 2011, W3.6
    Print publication:
    2003

  • We have developed a nano-micro structure fabrication method in rutile TiO2 single crystal by use of swift heavy-ion irradiation. The area where ions heavier than Cl ion accelerated with MeV-order high energy were irradiated was well etched by hydrofluoric acid, by comparison etching was not observed in the pristine TiO2 single crystal. Noticed that the irradiated area could be etched to a depth at which the electronic stopping power of the ion decayed to a value of 6.2keV/nm. We also found that the value of the electronic stopping power was increased, eventually decreased against depth in TiO2 single crystal with, e.g. 84.5MeV Ca ion. Using such a beam, inside of TiO2 single crystal was selectively etched with 20% hydrofluoric acid, while the top surface of TiO2 single crystal subjected to irradiation was not etched. Roughness of the new surface created in the single crystal was within 7nm with the atomic forth microscopy measurement.