On-off dissociation dynamics of colloidal doublets J. Bergenholtz, E. Kaunisto, A. Rasmuson, J. Remmelgas, S. Folestad and L. Lindfors EPL, 104 1 (2013) 18005 Published online: 15 November 2013 DOI: 10.1209/0295-5075/104/18005