Exploration of a standing mesochannel system with antimatter/matter atomic probes

Hiroyuki K M Tanaka, Yusuke Yamauchi, Toshikazu Kurihara, Yoshio Sakka, Kazuyuki Kuroda, Allen P. Mills

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    Positronium time-of-flight (Ps-TOF) spectroscopy was used to provide the accessibility of standing 2D hexagonal mesoporous film. The mesoporous film with perpendicular mesochannels was prepared by applying a magnetic field of 12T. The results show that all the 2D mesochannels are oriented parallel to the surface of the film, showing several morphologies such as S-, Y-, and swirl-shapes. The positron-implantation depth can be controlled precisely to a resolution of up to 10nm by changing the positron implantation energy. It is also found that the energy of the slow positron beam is 5 KeV, the beam size is 1 cm in diameter, and the beam intensity is 2×105 positrons/pulse. The results indicate that the micropores do not lead to significant Ps emission at higher implantation energies because the micropore density is low, leading to a large difference in the Ps emission rate between standing and lying 2D mesochannel systems.

    Original languageEnglish
    Pages (from-to)4728-4733
    Number of pages6
    JournalAdvanced Materials
    Volume20
    Issue number24
    DOIs
    Publication statusPublished - 2008 Dec 17

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    Positrons
    Spectroscopy
    Magnetic fields

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

    Cite this

    Tanaka, H. K. M., Yamauchi, Y., Kurihara, T., Sakka, Y., Kuroda, K., & Mills, A. P. (2008). Exploration of a standing mesochannel system with antimatter/matter atomic probes. Advanced Materials, 20(24), 4728-4733. https://doi.org/10.1002/adma.200800395

    Exploration of a standing mesochannel system with antimatter/matter atomic probes. / Tanaka, Hiroyuki K M; Yamauchi, Yusuke; Kurihara, Toshikazu; Sakka, Yoshio; Kuroda, Kazuyuki; Mills, Allen P.

    In: Advanced Materials, Vol. 20, No. 24, 17.12.2008, p. 4728-4733.

    Research output: Contribution to journalArticle

    Tanaka, HKM, Yamauchi, Y, Kurihara, T, Sakka, Y, Kuroda, K & Mills, AP 2008, 'Exploration of a standing mesochannel system with antimatter/matter atomic probes', Advanced Materials, vol. 20, no. 24, pp. 4728-4733. https://doi.org/10.1002/adma.200800395
    Tanaka, Hiroyuki K M ; Yamauchi, Yusuke ; Kurihara, Toshikazu ; Sakka, Yoshio ; Kuroda, Kazuyuki ; Mills, Allen P. / Exploration of a standing mesochannel system with antimatter/matter atomic probes. In: Advanced Materials. 2008 ; Vol. 20, No. 24. pp. 4728-4733.
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    AU - Kuroda, Kazuyuki

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