Free Access
J. Chim. Phys.
Volume 95, Number 6, June 1998
Page(s) 1286 - 1290
DOI: 10.1051/jcp:1998267

J. Chim. Phys. Vol. 95, N°6  p. 1286-1290

Orientation and structure of thin films of $\alpha$, $\omega$- dihexyl sexithiophene deposited onto PTFE oriented by friction

P. Lang1, C. Nogues1, S. Verneyre1, F. Demanze1, P. Srivastava1, F. Garnier1, J.C. Wittmann2, B. Lotz2 and C. Straupé2

1  LMM, 2 rue H. Dunant, CNRS, 94320 Thiais, France
2  ICS, CNRS-ULP, 6 rue Boussingault, 67083 Strasbourg, France

We analyze the influence of hexyl chains in terminal positions of a sexithiophene (DHS) on the orientation and structure of the evaporated film onto a thin layer of PTFE oriented by friction. When the substrate is cooled, the alkyl chains disorganize the film whereas at room temperature, the chains improve the orientation and epitaxial organization of molecular film towards the PTFE.

Nous analysons l'influence de chaînes hexyles en positions terminales d'un sexithiophène (DHS) sur l'orientation et la structure du film déposé par évaporation sur une couche mince de PTFE orienté par friction. Alors qu'à basse température du substrat, les chaînes alkyles désorganisent le film, à température ambiante au contraire, elles améliorent l'orientation et l'organisation epitaxiale du film par rapport au PTFE

Key words: orientation -- oligothiophene -- $\alpha$, $\omega$-dihexylsexithiophene -- PTFE -- epitaxy

© EDP Sciences 1998

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