Size-Dependent One- and Two-Photon Fluorescence of Acetonitrile-Derived Carbon Dots

Carbon dots—carbonaceous luminescent nanoparticles—are increasingly employed in bioimaging, fluorescent sensing, photocatalysis, and light emitting devices. The nanoparticle size is the key morphological parameter, affecting optical properties of carbon dots. To study the relation between the size a...

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Bibliographic Details
Published in:JETP letters 2023-11, Vol.118 (9), p.619-628
Main Authors: Astafiev, A. A., Shakhov, A. M., Nadtochenko, V. A.
Format: Article
Language:English
Subjects:
Acetonitrile
Atomic
Biological and Medical Physics
Biophysics
Carbon dots
Chemical composition
Electromagnetic absorption
Fluorescence
Medical imaging
Molecular
Nanoparticles
Optical and Plasma Physics
Optical properties
Optics and Laser Physics
Particle and Nuclear Physics
Photoluminescence
Photon absorption
Photons
Physics
Physics and Astronomy
Quantum Information Technology
Solid State Physics
Spintronics
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Summary:Carbon dots—carbonaceous luminescent nanoparticles—are increasingly employed in bioimaging, fluorescent sensing, photocatalysis, and light emitting devices. The nanoparticle size is the key morphological parameter, affecting optical properties of carbon dots. To study the relation between the size and linear and nonlinear light absorption and luminescence of carbon dots, we separated products obtained by laser synthesis from acetonitrile into fractions of different size and analyzed their optical properties and chemical composition. We found that the nanoparticle diameter influences photoluminescence spectra, lifetimes and quantum yields. A size-dependent difference in fluorescence excited by one- and two-photon absorption was also revealed.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364023602798