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Helium Film Formed in 1.2 nm Pore in Zeolite Templated Carbon

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Abstract

We have measured the vapor pressure of 4He adsorbed in zeolite templated carbon (ZTC) at 4.2 K, in order to examine 4He film growth in the nanopore. ZTC has a framework made of non-stacked graphene, and has a relatively uniform 1.2 nm pore with three-dimensional (3D) periodicity of 1.4 nm. The nanoporous substrate is a candidate to realize superfluid 4He film with closer 3D connectivity than those studied so far. From the vapor pressure, coverage dependences of the thickness and the two-dimensional (2D) isothermal compressibility of 4He film were derived using thermodynamic equations. The 2D compressibility indicates the onset coverage n 1 of the second adsorption layer around 20 µmol/m2. It is confirmed that the 4He film in the 1.2 nm pores grows uniformly at least up to 1.3–1.5 n 1.

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Author notes

  1. Ryo Toda

    Present address: Research Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan

Authors and Affiliations

  1. Department of Physics, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya, 464-8602, Japan

    Yusuke Kinosita, Ryo Toda, Taku Matsushita, Mitsunori Hieda & Nobuo Wada

  2. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai, 980-8577, Japan

    Hirotomo Nishihara & Takashi Kyotani

Authors
  1. Yusuke Kinosita
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  2. Ryo Toda
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  3. Taku Matsushita
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  4. Mitsunori Hieda
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  5. Nobuo Wada
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  6. Hirotomo Nishihara
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  7. Takashi Kyotani
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Corresponding author

Correspondence to Taku Matsushita.

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Kinosita, Y., Toda, R., Matsushita, T. et al. Helium Film Formed in 1.2 nm Pore in Zeolite Templated Carbon. J Low Temp Phys 158, 275–280 (2010). https://doi.org/10.1007/s10909-009-0007-8

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  • DOI: https://doi.org/10.1007/s10909-009-0007-8

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