Molecular dynamics study of the stability of a carbon nanotube atop a catalytic nanoparticle Alexey V. Verkhovtsev, Stefan Schramm and Andrey V. Solov’yov Eur. Phys. J. D, 68 9 (2014) 246 Published online: 11 September 2014 DOI: 10.1140/epjd/e2014-50371-4