2021
Exploring the Emission Pathways in Nitrogen-Doped Graphene Quantum Dots for Bioimaging
GOMEZ PEREZ, Inmaculada Jennifer, Manuel Vasques SULLEIRO, Anna DOLEČKOVÁ, Naděžda PIZÚROVÁ, Jiřina MEDALOVÁ et. al.Základní údaje
Originální název
Exploring the Emission Pathways in Nitrogen-Doped Graphene Quantum Dots for Bioimaging
Autoři
GOMEZ PEREZ, Inmaculada Jennifer (724 Španělsko, domácí), Manuel Vasques SULLEIRO (724 Španělsko), Anna DOLEČKOVÁ (203 Česká republika, domácí), Naděžda PIZÚROVÁ (203 Česká republika), Jiřina MEDALOVÁ (203 Česká republika, domácí), Rajarshi ROY (356 Indie, domácí), David NEČAS (203 Česká republika) a Lenka ZAJÍČKOVÁ (203 Česká republika, garant, domácí)
Vydání
Journal of Physical Chemistry C, American Chemical Society, 2021, 1932-7447
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10305 Fluids and plasma physics
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 4.177
Kód RIV
RIV/00216224:14310/21:00119558
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000704295900032
Klíčová slova anglicky
Fluorescence; Chemical synthesis; Transmission electron microscopy; Quantum mechanics; Functional groups
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 15. 2. 2023 16:48, doc. Mgr. Lenka Zajíčková, Ph.D.
Anotace
V originále
Graphene quantum dots (GQDs) with tunable fluorescence emission promise excellent bioapplication potential, especially in bioimaging. We report the synthesis of nitrogen-doped GQDs (N-GQDs) from glucose and ethylenediamine, cheap and safe chemicals, using a one-step and fast microwave-assisted hydrothermal method. Our N-GQDs exhibit fluorescence in the entire visible spectral region, which extends to near-ultraviolet and slightly to near-infrared. Since the origin of fluorescence and its relation to the structure and synthesis conditions are not yet fully understood, we also concentrated on the fluorescence mechanism explanation. Structural characterization with steady-state and time-resolved photoluminescence measurements indicated that band-to-band transitions, size effect, and different nitrogen and oxygen functional groups play a role in this multicolor emission. Remarkably, we found for the first time the evidence that directly relates a change in the N-GQD work function to the change in oxygen groups under UV irradiation via ultraviolet photoelectron spectroscopy. Thus, we confirmed that for λex ≲ 380 nm, photooxidation processes occurred, which led to chemical modification, thereby lowering the work function in the N-GQDs. The N-GQDs were proved to be highly biocompatible by a cell viability assay using vascular smooth muscle cells. Together with the wide spectral range emission observed in confocal fluorescence imaging, it demonstrated the potential of the N-GQDs for in vitro bioimaging applications.
Návaznosti
EF17_043/0009632, projekt VaV |
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EF18_070/0009846, projekt VaV |
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EF20_079/0017045, projekt VaV |
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GA18-12774S, projekt VaV |
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LM2018121, projekt VaV |
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LM2018129, projekt VaV |
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LQ1601, projekt VaV |
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857560, interní kód MU (Kód CEP: EF17_043/0009632) |
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