Toward a standardization of physico-chemical protocols for nanomedicine characterization: II. Zeta potential measurements Fanny Varenne, Jérémie Botton, Claire Merlet, Jean-Jacques Vachon, Sandrine Geiger, Ingrid C. Infante, Mohamed Chehimi and Christine Vauthier Published online: 21 September 2015 DOI: 10.1051/metrology/20150014003