3D spherical-cap fitting procedure for (truncated) sessile nano- and micro-droplets & -bubbles Huanshu Tan, Shuhua Peng, Chao Sun, Xuehua Zhang and Detlef Lohse Eur. Phys. J. E, 39 11 (2016) 106 Published online: 15 November 2016 DOI: 10.1140/epje/i2016-16106-6