Excitonic Photoluminescence of Ultra-Narrow 7-Armchair Graphene Nanoribbons Grown by a New “Bottom-Up” Approach on a Ni Substrate under Low Vacuum

Compared to well-studied single-wall carbon nanotubes, narrow graphene nanoribbons (GNRs) are in shadow due to difficulties in their synthesis (necessity of ultra-high vacuum, noble-metal substrate...