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Spontaneous formation of carbon dots helps to distinguish molecular fluorophores species

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GOMEZ PEREZ Inmaculada Jennifer SULLEIRO Manuel Vazquez PIZUROVA Nadezda BEDNAŘÍK Antonín LEPCIO Petr HOLEC David PREISLER Jan ZAJÍČKOVÁ Lenka

Rok publikování 2023
Druh Článek v odborném periodiku
Časopis / Zdroj Applied Surface Science
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://www.sciencedirect.com/science/article/pii/S0169433222030641?via%3Dihub
Doi http://dx.doi.org/10.1016/j.apsusc.2022.155536
Klíčová slova Carbon fluorescent nanoparticles; Carbon dots; Molecular species; Photoluminescence; DFT
Popis Carbon dots (CDs) display photophysical features that appear similar, if not identical, despite the variety of synthesis protocols used to obtain them. The unique design of CDs toward the desired properties requires an exhaustive understanding of the structure itself. This work offers a fundamental insight into the structure and formation of the carbon dots that allows distinguishing the existence of molecular fluorophore species. Remarkably, density functional theory calculations of the elucidated structures support the spontaneous for-mation of a compact network of molecular species. In addition, as a proof-of-principle, our work comprehen-sively studies the photoluminescence properties (i.e., concentration, pH and solvent dependencies), which pave the way for developing CD-based logic gate fluorescent sensors.
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