Active spheres induce Marangoni flows that drive collective dynamics Martin Wittmann, Mihail N. Popescu, Alvaro Domínguez and Juliane Simmchen Eur. Phys. J. E, 44 2 (2021) 15 Published online: 08 March 2021 DOI: 10.1140/epje/s10189-020-00006-5