Fig. 3
From: Self-assembly directed one-step synthesis of [4]radialene on Cu(100) surfaces

Optimized structure and STM simulation of self-assembled and covalent connected products. a, b The optimized structure and the corresponding simulated STM image (Vb = 2.0 V) of the molecular assembly of four phenylacetylene molecules on the Cu(100) surface. c, d The optimized structure and the corresponding simulated STM image (Vb = 2.0 V) of the covalently bonded tetramer on the Cu(100) surface. Color code: Cu (brown), C (gray), and H (white)