Resonance Energy Transfer Reveals the Presence of Multiple Luminescence Emission Centers within a Carbon Nanodot

Carbon nanodots are an emerging class of nanomaterials which exhibit visible photoluminescence, commonly attributed to luminescent organic groups within their structure. A question important for understanding luminescence mechanisms and practical applications of carbon nanodots is if a single nanopa...

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Bibliographic Details
Published in:JETP letters 2022-10, Vol.116 (8), p.505-513
Main Authors: Astafiev, A. A., Shakhov, A. M., Nadtochenko, V. A.
Format: Article
Language:English
Subjects:
Anisotropy
Atomic
Biological and Medical Physics
Biophysics
Carbon
Chemical compounds
Decay rate
Emission
Emitters
Energy transfer
Fluorescence
Luminescence
Molecular
Nanomaterials
Nanoparticles
Optical and Plasma Physics
Optical properties
Optics and Laser Physics
Particle and Nuclear Physics
Photoluminescence
Physics
Physics and Astronomy
Quantum Information Technology
Resonance
Solid State Physics
Spintronics
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Summary:Carbon nanodots are an emerging class of nanomaterials which exhibit visible photoluminescence, commonly attributed to luminescent organic groups within their structure. A question important for understanding luminescence mechanisms and practical applications of carbon nanodots is if a single nanoparticle can contain several independent luminescent emitters. In this study we employ resonance energy transfer to study mutual localization of fluorophores in nanodots solution of low concentration. Measurements of luminescence polarization anisotropy and photobleaching effects reveal considerable homo- and hetero-resonance energy transfer between fluorophores and thus demonstrate that several emitters can be comprised within a single nanoparticle. Energy transfer effects affect luminescent properties of carbon nanodots leading to decrease and faster decay of emission anisotropy, energy migration and quenching of blue luminescence.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364022601853