Tunneling Desorption of Single Hydrogen on the Surface of Titanium Dioxide

Taketoshi Minato, Seiji Kajita, Chi Lun Pang, Naoki Asao, Yoshinori Yamamoto, Takashi Nakayama, Maki Kawai, Yousoo Kim

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    We investigated the reaction mechanism of the desorption of single hydrogen from a titanium dioxide surface excited by the tip of a scanning tunneling microscope (STM). Analysis of the desorption yield, in combination with theoretical calculations, indicates the crucial role played by the applied electric field. Instead of facilitating desorption by reducing the barrier height, the applied electric field causes a reduction in the barrier width, which, when coupled with the electron excitation induced by the STM tip, leads to the tunneling desorption of the hydrogen. A significant reduction in the desorption yield was observed when deuterium was used instead of hydrogen, providing further support for the tunneling-desorption mechanism.

    Original languageEnglish
    Pages (from-to)6837-6842
    Number of pages6
    JournalACS Nano
    Volume9
    Issue number7
    DOIs
    Publication statusPublished - 2015 Jul 28

    Keywords

    • defect
    • manipulation
    • scanning tunneling microscopy
    • titanium dioxide

    ASJC Scopus subject areas

    • Materials Science(all)
    • Engineering(all)
    • Physics and Astronomy(all)

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