Back to Search
Start Over
Helium Film Formed in 1.2 nm Pore in Zeolite Templated Carbon.
- Source :
- Journal of Low Temperature Physics; Jan2010, Vol. 158 Issue 1/2, p275-280, 6p, 1 Diagram, 3 Graphs
- Publication Year :
- 2010
-
Abstract
- 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 1.3â1.5 n 1. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222291
- Volume :
- 158
- Issue :
- 1/2
- Database :
- Complementary Index
- Journal :
- Journal of Low Temperature Physics
- Publication Type :
- Academic Journal
- Accession number :
- 47274442
- Full Text :
- https://doi.org/10.1007/s10909-009-0007-8