Resumo – Publicações

The photophysics of polythiophene nanoparticles for biological applications.
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.
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.
ChemBioChem
v. 20, n. 4, p. 532-536 - Ano: 2019
Fator de Impacto: 2,774
http://dx.doi.org/10.1002/cbic.201800167
    @article={002930876,author = {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.},title={The photophysics of polythiophene nanoparticles for biological applications},journal={ChemBioChem},note={v. 20, n. 4, p. 532-536},year={2019}}