Collective Fluorescence of Graphene Quantum Dots on a surface
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908619546558464 |
|---|---|
| author | Levy-Falk, Hugo Sarkar, Suman Huynh, Thanh Trung Medina-Lopez, Daniel Hurley, Lauren Capelle, Océane Bouttemy, Muriel Trippé-Allard, Gaëlle Campidelli, Stéphane Rondin, Loïc Cassette, Elsa Deleporte, Emmanuelle Lauret, Jean-Sébastien |
| author_facet | Levy-Falk, Hugo Sarkar, Suman Huynh, Thanh Trung Medina-Lopez, Daniel Hurley, Lauren Capelle, Océane Bouttemy, Muriel Trippé-Allard, Gaëlle Campidelli, Stéphane Rondin, Loïc Cassette, Elsa Deleporte, Emmanuelle Lauret, Jean-Sébastien |
| contents | This study explores the organization of graphene quantum dots on the surface of monocrystalline halide perovskite. We show that graphene quantum dots tends to aggregate on the surface of perovskite unlike in solution or on other substrates, even at very low concentration of the initial solution that should yield single-molecule samples. Spectral analysis on small clusters shows a back-and-forth dynamical transition between an uncoupled, monomer-like state, and an excimer state. Following this "dance" between states, a drastic one-way increase in fluorescence intensity combined with a shortening of the excited state lifetime has been observed on some clusters. This behavior is related to the emission of a collective state that may be a consequence of the dynamical organization of graphene quantum dots under illumination on the surface of the perovksite. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_22458 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Collective Fluorescence of Graphene Quantum Dots on a surface Levy-Falk, Hugo Sarkar, Suman Huynh, Thanh Trung Medina-Lopez, Daniel Hurley, Lauren Capelle, Océane Bouttemy, Muriel Trippé-Allard, Gaëlle Campidelli, Stéphane Rondin, Loïc Cassette, Elsa Deleporte, Emmanuelle Lauret, Jean-Sébastien Mesoscale and Nanoscale Physics Atomic and Molecular Clusters This study explores the organization of graphene quantum dots on the surface of monocrystalline halide perovskite. We show that graphene quantum dots tends to aggregate on the surface of perovskite unlike in solution or on other substrates, even at very low concentration of the initial solution that should yield single-molecule samples. Spectral analysis on small clusters shows a back-and-forth dynamical transition between an uncoupled, monomer-like state, and an excimer state. Following this "dance" between states, a drastic one-way increase in fluorescence intensity combined with a shortening of the excited state lifetime has been observed on some clusters. This behavior is related to the emission of a collective state that may be a consequence of the dynamical organization of graphene quantum dots under illumination on the surface of the perovksite. |
| title | Collective Fluorescence of Graphene Quantum Dots on a surface |
| topic | Mesoscale and Nanoscale Physics Atomic and Molecular Clusters |
| url | https://arxiv.org/abs/2507.22458 |