P. Lang et al., SPECTROSCOPIC EVIDENCE FOR A SUBSTRATE-DEPENDENT ORIENTATION OF SEXITHIOPHENE THIN-FILMS DEPOSITED ONTO ORIENTED PTFE, JOURNAL OF PHYSICAL CHEMISTRY B, 101(41), 1997, pp. 8204-8211
Sexithiophene (6T) was deposited onto PTFE layers oriented by friction
. The films were studied by polarized spectroscopy: UV-visible, IR abs
orption, and fluorescence. The nature of the surface and the depositio
n rate are shown to greatly influence the orientation of the molecules
and the mesoscopic organization of the film. A quantitative analysis
of the orienting influence of the PTFE substrate toward the structure
of the molecular film is shown.