Dynamics of one-dimensional and two-dimensional helium adsorbed on carbon nanotubes S. O. Diallo, B. Fåk, M. A. Adams, O. E. Vilches, M. R. Johnson, H. Schober and H. R. Glyde EPL, 88 5 (2009) 56005 Published online: 16 December 2009 DOI: 10.1209/0295-5075/88/56005