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Temperature-Dependence of Solvent-Induced Stokes Shift and Fluorescence Tunability in Carbon Nanodots

1
Dipartimento di Fisica e Chimica—Emilio Segrè, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo, Italy
2
Dipartimento di Fisica ed Astronomia, Università degli Studi di Catania, Via Santa Sofia 64, 95123 Catania, Italy
*
Author to whom correspondence should be addressed.
Received: 29 March 2019 / Revised: 12 April 2019 / Accepted: 16 April 2019 / Published: 24 April 2019
(This article belongs to the Special Issue Recent Advances in Carbon Dots)
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Abstract

We carried out a cryogenic investigation on the optical properties of carbon dots, aiming to better understand their emission mechanism and the role of the solvent. The solvatochromic Stokes shift is quantified by a low temperature approach which allows freezing of the photo-excited state of carbon dots, preventing any solvation relaxation. Moreover, the reduction in temperature helps to identify the dynamical inhomogeneous contribution to the broadening of the emission band; therefore, disentangling the role of solvent from other types of broadening, such as the homogeneous and the static inhomogeneous contributions. View Full-Text
Keywords: carbon nanodots; fluorescence tunability; cryogenic optical study carbon nanodots; fluorescence tunability; cryogenic optical study
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sciortino, A.; Cannas, M.; Messina, F. Temperature-Dependence of Solvent-Induced Stokes Shift and Fluorescence Tunability in Carbon Nanodots. C 2019, 5, 20.

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