Fig. 7
From: Self-assembly directed one-step synthesis of [4]radialene on Cu(100) surfaces
Spectra measurements for the clean Cu(100) surface, single PA molecule and the tetramer. dZ/dV (a) and dI/dV (b) spectra acquired on bare Cu(100), isolated PA monomers and newly formed tetraphenyl[4]radialene products. c The calculated HOMO–LUMO levels for isolated PA monomer and tetraphenyl[4]radialene in vacuum
