Vesicles-on-a-chip: A universal microfluidic platform for the assembly of liposomes and polymersomes Julien Petit, Ingmar Polenz, Jean-Christophe Baret, Stephan Herminghaus and Oliver Bäumchen Eur. Phys. J. E, 39 6 (2016) 59 Published online: 14 June 2016 DOI: 10.1140/epje/i2016-16059-8