Surface-charge effects on the movement of a polyelectrolyte through a solid-state nanopore K. Ding, Q. Yan, N. Wang, F. Wu and Z. Wu Eur. Phys. J. Appl. Phys., 58 3 (2012) 31201 Published online: 05 July 2012 DOI: 10.1051/epjap/2012110290