Probing DNA and RNA single molecules with a double optical tweezer P. Mangeol, D. Côte, T. Bizebard, O. Legrand and U. Bockelmann Eur. Phys. J. E, 19 3 (2006) 311-317 Published online: 17 February 2006 DOI: 10.1140/epje/i2005-10060-4