Deformation hysteresis of a water nano-droplet in an electric field Fenhong Song, Dapeng Ju, Jing Fan, Qicheng Chen and Qingzhen Yang Eur. Phys. J. E, 42 9 (2019) 120 Published online: 10 September 2019 DOI: 10.1140/epje/i2019-11885-8