Fig. 5.

SEM photographs of NIH 3T3 cells for culturing 48 h on GaN NWs surfaces (a) before and (b) after UV irradiation [55]. (c) The SEM photograph of the GaN NWs; (d) The fluorescence microscope photograph showing MCF-7 cells captured on the biofunctionalized GaN NWs depicted in (c) [56]. The confocal images illustrating the distribution of vinculin (red) in NIH 3T3 cells for culturing 48 h on GaN NWs (e) and flat surfaces (f) [57]. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)