%0 DATA
%A Andreas W., Hauser
%A María, Pilar de Lara-Castells
%D 2016
%T Carbon Nanotubes Immersed in Superfluid Helium: The
Impact of Quantum Confinement on Wetting and Capillary Action
%U https://acs.figshare.com/articles/Carbon_Nanotubes_Immersed_in_Superfluid_Helium_The_Impact_of_Quantum_Confinement_on_Wetting_and_Capillary_Action/4287221
%R 10.1021/acs.jpclett.6b02414.ls01
%2 https://ndownloader.figshare.com/files/6987512
%K diameter
%K single-walled carbon nanotubes
%K adsorption
%K carbon Nanotubes Immersed
%K carbon nanotubes
%K orbital-free helium density
%K ab initio calculations
%X A recent
experimental study [Ohba, *Sci. Rep.* **2016**, *6*, 28992] of gas
adsorption on single-walled carbon nanotubes at temperatures between
2 and 5 K reported a quenched propagation of helium through carbon
nanotubes with diameters below 7 Å despite the small kinetic
diameter of helium atoms. After assessing the performance of a potential
model for the He–nanotube interaction via ab initio calculations
with density functional theory-based symmetry adapted perturbation
theory, we apply orbital-free helium density functional theory to
show that the counterintuitive experimental result is a consequence
of the exceptionally high zero-point energy of helium and its tendency
to form spatially separated layers of helium upon adsorption at the
lowest temperatures. Helium filling factors are derived for a series
of carbon nanotubes and compared to the available experimental data.