Electronic structure of highly ordered films of self-assembled graphitic nanocolumns
2003 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 68, no 19, 195414- p.Article in journal (Refereed) Published
Highly ordered, several nanometers thick films of alkylated large planar, polycyclic aromatic hydrocarbon (PAH) molecules have been grown on semi-metallic molybdenum disulfide substrates. The films are characterized by a two-dimensional lateral arrangement of columns standing at the surface on a macroscopic scale. The self-assembly of such insulated columns of face-to-face disks with surface-induced vertical alignment has been achieved directly from solution processing. Angle-resolved photoelectron spectra revealed a highly anisotropic quasi-one-dimensional electronic structure with an extended π-electronic wave function. An intermolecular dispersion of the highest occupied band of at least 0.15 eV along the stacking direction has been measured. A partial breakdown of the concept of quasimomentum due to the finite size of the nano-objects perpendicular to the stacks is observed.
Place, publisher, year, edition, pages
2003. Vol. 68, no 19, 195414- p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-47736DOI: 10.1103/PhysRevB.68.195414OAI: oai:DiVA.org:liu-47736DiVA: diva2:268632