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Zeitschriftenartikel

Electronic structure of highly ordered films of self-assembled graphitic nanocolumns

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons48768

Simpson,  C. D.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48967

Watson,  Mark D.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48459

Müllen,  Klaus
MPI for Polymer Research, Max Planck Society;

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Zitation

Friedlein, R., Crispin, X., Simpson, C. D., Watson, M. D., Jäckel, F., Osikowicz, W., et al. (2003). Electronic structure of highly ordered films of self-assembled graphitic nanocolumns. Physical Review B, 68(19): 195414.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-63C7-0
Zusammenfassung
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.