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Title: The photophysics of polythiophene nanoparticles for biological applications
Authors: Bargigia, Ilaria
Zucchetti, Elena
Kandada, Ajay Ram Srimath
Moreira, Miguel
Bossio, Caterina
Wong, Walter P. D.
Miranda, Paulo Barbeitas
Decuzzi, Paolo
Soci, Cesare
D'Andrea, Cosimo
Lanzani, Guglielmo
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.
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.
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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