“Multiplexed Parallel Single Transport Recordings on Nanopore Arrays”,
DOI: 10.1021/nl1033528, Nano Lett., 2010, 10, 50805087 by
Alexander Kleefen, Daniel Pedone, Christian Grunwald, Ruoshan Wei, Matthias Firnkes, Gerhard Abstreiter, Ulrich Rant, and Robert Tampe.
Openings so small that DNA can only wiggle through in its stretched out form.