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Article Dans Une Revue Nanophotonics Année : 2021

Enhanced electric field sensitivity of quantum dot/rod two-photon fluorescence and its relevance for cell transmembrane voltage imaging

Résumé

The optoelectronic properties of semiconductor nanoparticles make them valuable candidates for the long-term monitoring of transmembrane electric fields in excitable cells. In this work, we show that the electric field sensitivity of the fluorescence intensity of type-I and quasi-type-II quantum dots and quantum rods is enhanced under two-photon excitation compared to single-photon excitation. Based on the superior electric field sensitivity of the two-photon excited fluorescence, we demonstrate the ability of quantum dots and rods to track fast switching E-fields. These findings indicate the potential of semiconductor nanoparticles as cellular voltage probes in multiphoton imaging.
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hal-03320264 , version 1 (16-11-2021)

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Stijn Jooken, Yovan de Coene, Olivier Deschaume, Dániel Zámbó, Tangi Aubert, et al.. Enhanced electric field sensitivity of quantum dot/rod two-photon fluorescence and its relevance for cell transmembrane voltage imaging. Nanophotonics, 2021, 10 (9), pp.2407-2420. ⟨10.1515/nanoph-2021-0077⟩. ⟨hal-03320264⟩
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