Condensation of helium in nanotube bundles
Helium atoms are strongly attracted to the interstitial channels within a bundle of carbon nanotubes. The strong corrugation of the axial potential within a channel can produce a lattice gas system wherein the weak mutual attraction between atoms in neighboring channels induces a transition to an anisotropic condensed phase. At low temperatures, the specific heat of the adsorbate phase (with fewer than 2% of the atoms) greatly exceeds that of the host.
Cole
MW
Department of Physics, 104 Davey Laboratory, Penn State University, University Park, Pennsylvania 16802-6300, USA.
Crespi
VH
Stan
G
Ebner
C
Hartman
JM
Moroni
S
Boninsegni
M