Skip to Main content Skip to Navigation
Conference papers

Synthesis and optical properties of graphene quantum dots

Julien Lavie 1, * Shen Zhao 2 Lucile Orcin Chaix 2 A. Narita 3 Jean‐sébastien Lauret 2 Stéphane Campidelli 1 
* Corresponding author
1 LICSEN - Laboratoire Innovation en Chimie des Surfaces et NanoSciences
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
Abstract : The outstanding electronic, optical and mechanical properties of graphene strongly inspire the scientific community at both the fundamental and applicative levels. However, one of the main challenges of the field is the control and modification of graphene electronic properties. It is well known that when a material is reduced to nanoscale dimensions, the electronic confinement induces original size-dependent properties. For the last decade, the size reduction of graphene was mostly done through conventional top-down approaches to fabricate graphene quantum dots (GQDs)or graphene nanoribbons (GNRs). However, top-down approaches do not allow a sufficient control of the morphology and oxidation state of the edges, which drastically impact the properties. In order to truly control, with the required level of precision, the morphology and the composition of the materials and of its edges, the bottom-up approach is the relevant way to proceed. With the aim to study and understand the optical properties of GQD materials, we performed the bottom-up synthesis e of different families of nanoparticles exhibiting controlled shapes and edges. Because of their strong aromatic character graphene nanoparticles tend to aggregate in solution; however, for future application it is of high interest to be able to discriminate the intrinsic absorption and emission of the GQDs from those of aggregates. For example, we observed that by STM and polarized microscopy the GQDs bearing alkyl chains are forming columnar structures with liquid crystal properties in solvents. Here, we study the optical properties of graphene quantum dots as a function of their individualization. Using absorption, steady-state and time-resolved photoluminescence and photoluminescence excitation (PLE) spectroscopy, we try to establish the intrinsic optical properties of the GQDs and understand how the structure influences the properties.
Document type :
Conference papers
Complete list of metadata
Contributor : Serge Palacin Connect in order to contact the contributor
Submitted on : Thursday, October 31, 2019 - 11:40:28 AM
Last modification on : Saturday, June 25, 2022 - 10:40:45 PM
Long-term archiving on: : Saturday, February 1, 2020 - 2:33:10 PM


Lavie_MRS 2017.pdf
Files produced by the author(s)


  • HAL Id : cea-02341205, version 1


Julien Lavie, Shen Zhao, Lucile Orcin Chaix, A. Narita, Jean‐sébastien Lauret, et al.. Synthesis and optical properties of graphene quantum dots. MRS Fall Meeting, Nov 2017, Boston, United States. ⟨cea-02341205⟩



Record views


Files downloads