Helium film formed in 1.2 nm pore in zeolite templated carbon

Yusuke Kinosita; Ryo Toda; Taku Matsushita; Mitsunori Hieda; Nobuo Wada; Hirotomo Nishihara; Takashi Kyotani

doi:10.1007/s10909-009-0007-8

Helium film formed in 1.2 nm pore in zeolite templated carbon

Yusuke Kinosita, Ryo Toda, Taku Matsushita, Mitsunori Hieda, Nobuo Wada, Hirotomo Nishihara, Takashi Kyotani

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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/m ². 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.

Original language	English
Pages (from-to)	275-280
Number of pages	6
Journal	Journal of Low Temperature Physics
Volume	158
Issue number	1-2
DOIs	https://doi.org/10.1007/s10909-009-0007-8
Publication status	Published - 2010 Jan

Keywords

Film growth
Helium 4
Nanopore

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Materials Science(all)
Condensed Matter Physics

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10.1007/s10909-009-0007-8

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title = "Helium film formed in 1.2 nm pore in zeolite templated carbon",

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/m 2. 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.",

keywords = "Film growth, Helium 4, Nanopore",

author = "Yusuke Kinosita and Ryo Toda and Taku Matsushita and Mitsunori Hieda and Nobuo Wada and Hirotomo Nishihara and Takashi Kyotani",

note = "Funding Information: Acknowledgements We thank T. Kurokawa for technical support. This research was partly supported by Grants-in-Aid for Scientific Research (Grants Nos. 17071006 and 17204029) from the Ministry of Education, Culture, Sports, Science and Technology of Japan.",

year = "2010",

month = jan,

doi = "10.1007/s10909-009-0007-8",

language = "English",

volume = "158",

pages = "275--280",

journal = "Journal of Low Temperature Physics",

issn = "0022-2291",

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T1 - Helium film formed in 1.2 nm pore in zeolite templated carbon

AU - Kinosita, Yusuke

AU - Toda, Ryo

AU - Matsushita, Taku

AU - Hieda, Mitsunori

AU - Wada, Nobuo

AU - Nishihara, Hirotomo

AU - Kyotani, Takashi

N1 - Funding Information: Acknowledgements We thank T. Kurokawa for technical support. This research was partly supported by Grants-in-Aid for Scientific Research (Grants Nos. 17071006 and 17204029) from the Ministry of Education, Culture, Sports, Science and Technology of Japan.

PY - 2010/1

Y1 - 2010/1

N2 - 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/m 2. 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.

AB - 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/m 2. 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.

KW - Film growth

KW - Helium 4

KW - Nanopore

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Helium film formed in 1.2 nm pore in zeolite templated carbon

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Keywords

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