Fig. 4From: Regeneration of TiO2 Nanotube Arrays after Long-Term Cell and Tissue Culture for Multiple Use – an Environmental Scanning Electron Microscopy (ESEM) Survey of Adult Pig Retina and beyondESEM image of living cells on top of a nanotube array (a) and SEM images for different UV-light irradiation times on PFA fixed cells: 0 min (b), 2 min (c), 22 min (d), 62 min (e) and 102 min (f). Scale bars correspond to 50 μmBack to article page