Can one detach a fully adsorbed flexible polymer chain by an ultra-small external force? Alexander M. Skvortsov, Leonid I. Klushin, Alexey A. Polotsky and Kurt Binder EPL, 104 1 (2013) 18003 Published online: 15 November 2013 DOI: 10.1209/0295-5075/104/18003