Physicochemical properties of nano-enhanced colloidal gas aphron (NCGA)-based fluids Amir Tabzar, Hossein Ziaee, Milad Arabloo and Mohammad Hossein Ghazanfari Eur. Phys. J. Plus, 135 3 (2020) 312 Published online: 16 March 2020 DOI: 10.1140/epjp/s13360-020-00174-5