Probing passive diffusion of flagellated and deflagellated Escherichia coli S. Tavaddod, M.A. Charsooghi, F. Abdi, H.R. Khalesifard and R. Golestanian Eur. Phys. J. E, 34 2 (2011) 16 Published online: 21 February 2011 DOI: 10.1140/epje/i2011-11016-9