Interfacial Coupling and Sparse Intercalation of 7-Atom-Wide Armchair Graphene Nanoribbons by N-Heterocyclic Carbene Monolayers
This study demonstrates that the intercalation efficiency of N-heterocyclic carbene monolayers beneath 7-atom-wide armchair graphene nanoribbons on Au(111) is critically governed by the molecular adsorption geometry, where flat-lying methyl-substituted dimers enable partial decoupling while bulky isopropyl-substituted monomers prevent intercalation.