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|Title:||The photophysics of polythiophene nanoparticles for biological applications||Authors:||Bargigia, Ilaria
Kandada, Ajay Ram Srimath
Wong, Walter P. D.
Miranda, Paulo Barbeitas
|Keywords:||Engineering::Nanotechnology||Issue Date:||2019||Source:||Bargigia, I., Zucchetti, E., Kandada, A. R. S., Moreira, M., Bossio, C., Wong, W. P. D., Miranda, P. B., Decuzzi, P., Soci, C., D'Andrea, C. & Lanzani, G. (2019). The photophysics of polythiophene nanoparticles for biological applications. ChemBioChem, 20(4), 532-536. https://dx.doi.org/10.1002/cbic.201800167||Journal:||ChemBioChem||Abstract:||In this work the photophysics of poly(3-hexylthiophene) nanoparticles (NPs) is investigated in the context of their biological applications. The NPs, made as colloidal suspensions in aqueous buffers, present a distinct absorption band in the low-energy region. On the basis of systematic analysis of absorption and transient absorption (TA) spectra taken under different pH conditions, this band is associated with charge-transfer states generated by the polarization of loosely bound polymer chains and originating from complexes formed with electron-withdrawing species. Importantly, the ground-state depletion of these states upon photoexcitation is active even on microsecond timescales, thus suggesting that they act as precursor states for long-living polarons; this could be beneficial for cellular stimulation. Preliminary transient absorption microscopy results for NPs internalized within the cells reveal the presence of long-living species, further substantiating their relevance in biointerfaces.||URI:||https://hdl.handle.net/10356/150565||ISSN:||1439-4227||DOI:||10.1002/cbic.201800167||Rights:||© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||MSE Journal Articles|
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