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Polar Order in Spin-Coated Films of a Regioregular Chiral Poly[(S)-3-(3,7-dimethyloctyl)thiophene]


  • G. K., C. S., S. S., T. V., and A. P thank the Fund for Scientific Research-Flanders (FWO-Vlaanderen; G.0261.02, G.0260.03), the Katholieke Universiteit Leuven (GOA/2000/03) and the Belgian government (IUAP P5/03). A. M., S. D. F. and F. C. D. S. thank the DWTC, through IUAP-V-03 and the Institute for the Promotion of Innovation by Sciences and Technology in Flanders (IWT) and the Fund for Scientific Research-Flanders (FWO). S. D. F and G. K. are postdoctoral fellows of the FWO.


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Films of regioregular chiral poly[(S)-3-(3,7-dimethyloctyl)thiophene] (see Figure) prepared via spin-coating and characterized by polarized UV-vis spectroscopy show that order along the film normal is present (which is proportional to the spinning rate). Phase-sensitive second-harmonic generation experiments demonstrate this order to be polar.

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