Article (Scientific journals)
Vibronic effect and influence of aggregation on the photophysics of graphene quantum dots.
Liu, Thomas; {"lastName":"Tonnelé", "firstNames":"Claire","affiliations":["CMN, Université MONS, Belgium"],"ids":["SC:36469058500""OR:0000-0003-0791-8239"]}; Zhao, Shen et al.
2022In Nanoscale, 14 (10), p. 3826 - 3833
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Keywords :
Bio-imaging; Emission process; Nano-objects; Optical study; Photophysical properties; Photophysics; Photovoltaics; Quantum light emitters; Single molecule level; Vibronic effect; Materials Science (all); General Materials Science
Abstract :
[en] Graphene quantum dots, atomically precise nanopieces of graphene, are promising nano-objects with potential applications in various domains such as photovoltaics, quantum light emitters and bio-imaging. Despite their interesting prospects, precise reports on their photophysical properties remain scarce. Here, we report on a study of the photophysics of C96H24(C12H25) graphene quantum dots. A combination of optical studies down to the single molecule level with advanced molecular modelling demonstrates the importance of coupling to vibrations in the emission process. Optical fingerprints for H-like aggregates are identified. Our combined experimental-theoretical investigations provide a comprehensive description of the light absorption and emission properties of nanographenes, which not only represents an essential step towards precise control of sample production but also paves the way for new exciting physics focused on twisted graphenoids.
Disciplines :
Chemistry
Author, co-author :
Liu, Thomas;  Université Paris-Saclay, ENS Paris-Saclay, CentraleSupélec, CNRS, LuMIn, Orsay, France. lauret@ens-paris-saclay.fr
{"lastName":"Tonnelé", "firstNames":"Claire","affiliations":["CMN, Université MONS, Belgium"],"ids":["SC:36469058500""OR:0000-0003-0791-8239"]}
Zhao, Shen;  Université Paris-Saclay, ENS Paris-Saclay, CentraleSupélec, CNRS, LuMIn, Orsay, France. lauret@ens-paris-saclay.fr
{"lastName":"Rondin", "firstNames":"Loïc","affiliations":["Université Paris-Saclay, ENS Paris-Saclay, CentraleSupélec, CNRS, LuMIn, Orsay, France. lauret@ens-paris-saclay.fr"],"ids":["SC:36437558800""OR:0000-0002-4833-2886"]}
Elias, Christine;  Université Paris-Saclay, ENS Paris-Saclay, CentraleSupélec, CNRS, LuMIn, Orsay, France. lauret@ens-paris-saclay.fr
Medina-Lopez, Daniel;  Université Paris-Saclay, CEA, CNRS, NIMBE, LICSEN, 91191, Gif-sur-Yvette, France
Okuno, Hanako;  University Grenoble Alpes, CEA INAC-MEM, F-38000 Grenoble, France
{"lastName":"Narita", "firstNames":"Akimitsu","affiliations":["Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany"],"ids":["SC:55169529600""OR:0000-0002-3625-522X"]}
Chassagneux, Yannick;  LPENS, PSL, CNRS, Université de Paris, Sorbonne Université, 75005 Paris, France
{"lastName":"Voisin", "firstNames":"Christophe","affiliations":["LPENS, PSL, CNRS, Université de Paris, Sorbonne Université, 75005 Paris, France"],"ids":["SC:57205273245""OR:0000-0003-3175-9311"]}
{"lastName":"Campidelli", "firstNames":"Stéphane","affiliations":["Université Paris-Saclay, CEA, CNRS, NIMBE, LICSEN, 91191, Gif-sur-Yvette, France"],"ids":["SC:12762946600""OR:0000-0001-6060-4891"]}
{"lastName":"Lauret", "firstNames":"Jean-Sébastien","affiliations":["Université Paris-Saclay, ENS Paris-Saclay, CentraleSupélec, CNRS, LuMIn, Orsay, France. lauret@ens-paris-saclay.fr"],"ids":["SC:15048347800""OR:0000-0003-1309-4977"]}
More authors (3 more) Less
Language :
English
Title :
Vibronic effect and influence of aggregation on the photophysics of graphene quantum dots.
Publication date :
10 March 2022
Journal title :
Nanoscale
ISSN :
2040-3364
eISSN :
2040-3372
Publisher :
Royal Society of Chemistry, England
Volume :
14
Issue :
10
Pages :
3826 - 3833
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S817 - Chimie des matériaux nouveaux
Research institute :
Complexys
Matériaux
Funders :
Agence Nationale de la Recherche
Deutsche Forschungsgemeinschaft
Fonds De La Recherche Scientifique - FNRS
Fédération Wallonie-Bruxelles
Funding text :
This work was financially supported by the FLAG-ERA Grant OPERA by DFG 437130745 and ANR-19-GRF1-0002-01, by the ANR-DFG NLE Grant GRANAO, by DFG 431450789 and ANR-19-CE09-0031-01, and by a public grant overseen by the French National Research Agency (ANR) as part of the “Investissements d'Avenir” program (Labex NanoSaclay, reference: ANR-10-LABX-0035). Computational resources were provided by the Consortium des Équipements de Calcul Intensif (CÉCI), funded by the Fonds de la Recherche Scientifiques de Belgique (F.R.S.-FNRS) under Grant No. 2.5020.11, and the Tier-1 supercomputer of the Fédération Wallonie-Bruxelles. The infrastructure was funded by the Walloon Region under the grant agreement n1117545. D. B. is a FNRS Research Director.
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