Research On-surface synthesis – nanoribbons Armchair vs. chiral Zig-zag edges Graphene nanostructure junctions Nanoribbon & h-BN On-surface synthesis – carbon nanotubes Single-chirality carbon nanotubes Light harvesting Luminescent solar concentrators Optical properties Charged molecules Growth-mode-dependent optical spectra Oscillator strength increase Solid-state excitons in PTCDA films