“…[ 105–109 ] Indeed, very recently, the formation of hexagonal graphene lattice was observed by ultra‐high vacuum deposition of 40 onto a Cu(111) surface and heating at 1000 K (Figure 12C). [ 110 ] A similar graphene sheet was also formed by changing 40 with pyrene under the same conditions. Numerous measurements, including scanning tunneling microscopy, X‐ray photoelectron spectroscopy, angle‐resolved photoemission spectroscopy, Raman spectroscopy, and low‐energy electron diffraction, verified the formation of low‐defect monolayer graphene by depositing 40 on Cu(111).…”