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Self-assembly of chiral windmill structure. (A) and (B) High-resolution STM images of windmill structure with clockwise and counterclockwise fashion. Vbias = 635 mV and It = 640 pA for (A), and Vbias = 635 mV and It = 646 pA for (B). (C) and (D) Structural models for adlayers in (A) and (B), respectively. The Insets in (C) and (D) show the possible H bondings in area A indicated by a red square.
