Extended Data Fig. 2: Surface morphologies of the samples (1) and (6)-(8).

a-d, AFM surface profile of sample (1) (a), sample (6) (b), sample (7) (c), and sample (8) (d). Three different points for each sample were measured.
a-d, AFM surface profile of sample (1) (a), sample (6) (b), sample (7) (c), and sample (8) (d). Three different points for each sample were measured.