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Open AccessArticle

Luminescent Carbon Dots Synthesized by the Laser Ablation of Graphite in Polyethylenimine and Ethylenediamine

1
Institute of Fundamental Technological Research Polish Academy of Science, Pawinskiego 5B, 02-106 Warsaw, Poland
2
Institute of Metallurgy and Materials Science Polish Academy of Science, Reymonta 25, 30-059 Cracow, Poland
3
Faculty of Chemical and Process Engineering, Warsaw University of Technology, Warynskiego 1, 00-645 Warsaw, Poland
*
Author to whom correspondence should be addressed.
Academic Editor: Marek Wiśniewski
Materials 2021, 14(4), 729; https://doi.org/10.3390/ma14040729
Received: 18 November 2020 / Revised: 29 January 2021 / Accepted: 30 January 2021 / Published: 4 February 2021
Fluorescent carbon dots (CDs) synthesized by pulsed laser ablation in liquid (PLAL) are still interesting materials due to their possible applications. However, unlike CDs produced by the hydrothermal method, CDs produced the synthesis products by the PLAL method were never separated by dialysis, which differentiates the synthesis products and allows the identification of the main source of fluorescence. In this work, the synthesis of fluorescent carbon dots (CDs) was performed by nanosecond laser ablation of a graphite target immersed in polyethyleneimine (PEI) and ethylenediamine (EDA), and the synthesis products were separated by dialysis. The results of optical measurements showed that the main source of luminescence of the obtained nanostructures are fluorescent particles or quasi-molecular fluorophores created in the ablation process. In the case of ablation in PEI, most of the produced molecular fluorophores are associated with carbogenic nanostructures, while in the case of EDA, free fluorescent molecules dominate. View Full-Text
Keywords: carbon dots; photoluminescence; laser ablation carbon dots; photoluminescence; laser ablation
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MDPI and ACS Style

Kaczmarek, A.; Hoffman, J.; Morgiel, J.; Mościcki, T.; Stobiński, L.; Szymański, Z.; Małolepszy, A. Luminescent Carbon Dots Synthesized by the Laser Ablation of Graphite in Polyethylenimine and Ethylenediamine. Materials 2021, 14, 729. https://doi.org/10.3390/ma14040729

AMA Style

Kaczmarek A, Hoffman J, Morgiel J, Mościcki T, Stobiński L, Szymański Z, Małolepszy A. Luminescent Carbon Dots Synthesized by the Laser Ablation of Graphite in Polyethylenimine and Ethylenediamine. Materials. 2021; 14(4):729. https://doi.org/10.3390/ma14040729

Chicago/Turabian Style

Kaczmarek, Agata; Hoffman, Jacek; Morgiel, Jerzy; Mościcki, Tomasz; Stobiński, Leszek; Szymański, Zygmunt; Małolepszy, Artur. 2021. "Luminescent Carbon Dots Synthesized by the Laser Ablation of Graphite in Polyethylenimine and Ethylenediamine" Materials 14, no. 4: 729. https://doi.org/10.3390/ma14040729

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