(a) A representative image of DNA-linked G7-G5 dendrimer nanocluster on mica (500 nm × 500 nm), (b) a three-dimensional image of one single dimeric cluster arrowed in (a), and (c) a line scan analysis of the cluster according to the white line in (a). The intra-dendrimer distance was theoretically calculated to be 20 nm and observed to be 21 ± 2 nm on average.