Abstract
We report measurements of the molecular first hyperpolarizability, thermal stability, photophysical, piezoelectric, and ferroelectric properties of a benzothiazole derivative bearing an arylthiophene π-conjugated bridge both in solution and when embedded into a poly (l-lactic acid) matrix in the form of electrospun fibers with an average diameter of roughly 500 nm. The embedded nanocrystalline phenylthienyl-benzothiazole with crystal sizes of about 1.4 nm resulted in a good piezoelectric response from these functionalized electrospun fibers, indicative of a polar crystalline structure.
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Acknowledgments
The authors wish to thank the Fundação para a Ciência e Tecnologia (FCT, Portugal) and FEDER-COMPETE for financial support through the Centro de Química and Centro de Física - Universidade do Minho, Projects PTDC/CTM/105597/2008 (FCOMP-01-0124-FEDER-009457), PEst-C/QUI/UI0686/2013 (FCOMP-01-0124-FEDER-037302), and a post-doctoral Grant to R.M.F. Batista (SFRH/BPD/79333/2011). The NMR spectrometer Bruker Avance III 400 is part of the National NMR Network and was purchased within the framework of the National Program for Scientific Re-equipment, contract REDE/1517/RMN/2005 with funds from POCI 2010 (FEDER) and FCT.
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Baptista, R.M.F., Isakov, D., Raposo, M.M.M. et al. Ferroelectric nanofibers with an embedded optically nonlinear benzothiazole derivative. J Nanopart Res 16, 2502 (2014). https://doi.org/10.1007/s11051-014-2502-3
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DOI: https://doi.org/10.1007/s11051-014-2502-3