Neuronal chemotaxis by optically manipulated liposomes G. Pinato, L. T. Lien, E. D’Este, V. Torre and D. Cojoc J. Eur. Opt. Soc.-Rapid Publ., 6 (2011) 11042 Published online: 24 August 2011 DOI: 10.2971/jeos.2011.11042