Fig. 2
From: Self-assembly directed one-step synthesis of [4]radialene on Cu(100) surfaces
Formation of tetramers on Cu(100). a The STM image after dosing 0.003 ML phenylacetylene molecules on a Cu(100) surface held at 20 K. b The STM image after annealing the sample at 200 K for 20 min. c The high-resolution details of the tetramer features. The image size are 100 nm × 100 nm for a, 40 nm × 40 nm for b, and 4 nm × 4 nm for c. The scanning parameters are Vb = 1 V, It = 50 pA for all the images
