Scanning Tunneling Microscopy Investigations of Self-Organized Poly(3-hexylthiophene) Two-Dimensional Polycrystals


  • This work is in part supported by “CPER Nanophysique, région Rhône–Alpes”, France. M. Fakir and C. Lombard are gratefully acknowledged for technical developments and support. We thank Dr. D. Djurado and Prof. J. F. Legrand for helpful discussions.


Scanning tunneling microscopy images of thin films of polythiophene cast on highly oriented pyrolytic graphite gives structural insight on both local (chain-packing and conformational) and mesoscopic (polycrystal structure) scales. It is revealed that 2D polycrystals form mono-domains (20 nm parallel and perpendicular to the polymer backbone) (see Figure), partially interconnected by folded chains.