Fig. 16

C-Ring morphology. A A long poly(C) single strand is folded into a C-Ring in the presence of Ag⁺ ions. B AFM image of C-Rings deposited on mica. C AFM image of C-Rings deposited on gold. Inset: a C-Ring cross-section, from which the local apparent height is obtained. D All four C-Ring height distributions, attained from AFM at RT, STM at RT, STM at 77 K, and STM at 4 K, yield the same average apparent height. (reproduced with permission from Ref. [38],© Nano Letters 2020)