SEM images for the Fe-doped In₂O₃ nanodot arrays. (a)–(d) The morphologies of nanodot arrays with average diameters of 80, 65, 50, and 35nm and inter-dot distances of 105nm. (e)–(h) The cross-sectional SEM images of corresponding nanodot arrays.^[54] Copyright (2018) Springer Nature.