Highly photoluminescent blue–green carbon quantum dots synthesized via plasma solution interaction for bioimaging applications
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https://doi.org/10.15625/0868-3166/23622Keywords:
carbon quantum dots, plasma solution interaction, glucose precursor, photoluminescence, quantum yield, bioimagingAbstract
Blue (B-CQDs) and green (G-CQDs) Carbon Quantum Dots with exceptional photoluminescence were synthesized using a plasma solution interaction method, employing glucose as an environmentally friendly carbon source. The PSI process enabled rapid, catalyst-free synthesis with tunable optical properties by varying plasma exposure time. Both types of Carbon Quantum Dots consist of uniformly dispersed spherical nanoparticles (3–5 nm), with partially graphitic cores and a lattice spacing of 0.21 nm corresponding to the (100) plane of graphite. The B-CQDs emit intense blue light at 450 nm, with a quantum yield of 21%, while the G-CQDs display strong green emission at 515 nm, yielding a quantum yield of 19%. Structural and spectroscopic analyses indicate that blue emission results from intrinsic π–π* transitions within sp2-hybridized carbon domains, whereas green emission originates from surface or defect-state n–π* transitions linked to oxygen-containing groups formed during prolonged plasma treatment. Both types of CQDs exhibit excellent aqueous stability, photostability, and biocompatibility, with strong intracellular fluorescence observed in preliminary bioimaging tests. These findings underscore plasma solution interaction as an efficient, controllable method for producing color-tunable CQDs with potential for optical and biological applications.
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[1] X. Yao, R. E. Lewis and C. L. Haynes, Synthesis processes, photoluminescence mechanism, and the toxicity of amorphous or polymeric carbon dots, Acc. Chem. Res. 55 (2022) 3312.
[2] Q. Xu, H. Cai, W. Li, M. Wu, Y. Wu and X. Gong, Carbon dot/inorganic nanomaterial composites, J. Mater. Chem. A 10 (2022) 14709.
[3] Y. Li, Q. Li, S. Meng, Y. Qin, D. Cheng, H. Gu et al., Ultrabroad-band, white light emission from carbon dot-based materials with hybrid fluorescence/phosphorescence for single component white light-emitting diodes, Chin. Chem. Lett. 34 (2023) 107794.
[4] L. Ai, Z. Song, M. Nie, J. Yu, F. Liu, H. Song et al., Solid-state fluorescence from carbon dots widely tunable from blue to deep red through surface ligand modulation, Angew. Chem. 135 (2023) e202217822.
[5] J. Lin, L. Wang, Q. Jing and H. Zhao, Highly efficient and high color rendering index multilayer luminescent solar concentrators based on colloidal carbon quantum dots, Chem. Eng. J. 481 (2024) 148441.
[6] Y. Wang, Y. Qin, W. Tian, H. Zhang, F. Wang, X. Yan et al., Dye-incorporated carbonized polymer dots with tunable solid-state emission based on intraparticle f{"orster resonance energy transfer}, Adv. Funct. Mater. 34 (2024) 2402825.
[7] X. Xu, R. Ray, Y. Gu, H. J. Ploehn, L. Gearheart, K. Raker et al., Electrophoretic analysis and purification of fluorescent single-walled carbon nanotube fragments, J. Am. Chem. Soc. 126 (2004) 12736.
[8] V. D. Pham, A. T. Le, M. H. Do, T. H. Le Thi, D. T. Nguyen, H. M. Pham et al., Surface modification of nitrogen-doped carbon quantum dots for enhanced functionalities, Comm. Phys. 34 (2024) 413.
[9] K. Jiang, S. Sun, L. Zhang, Y. Lu, A. Wu, C. Cai et al., Red, green, and blue luminescence by carbon dots: Full-color emission tuning and multicolor cellular imaging, Angew. Chem. Int. Ed. 54 (2015) 5360.
[10] N. Thanh Binh, P. Van Duong, D. Hoang Tung, P. Hong Minh and D. Thi Kieu Anh, The effect of fabrication conditions on optical characteristics of cqds prepared by micro plasma, Vietnam J. Sci. Technol. 63 (2025) 1107.
[11] D. H. Tung, T. T. Thuong, N. D. Cong, N. T. Liem, N. Van Kha, L. H. Manh et al., Facile synthesis of carbon quantum dots by plasma-liquid interaction method, Comm. Phys. 27 (2017) 311.
[12] M. H. Nguyen, D. T. Le, H. T. Do and A. T. Le, Remarkable luminescent carbon quantum dots: green synthesis from orange juice using microplasma-liquid method, Fullerenes Nanotub. Carbon Nanostruct. 32 (2024) 282.
[13] P. Van Duong, L. Anh Thi, L. Duc Toan, P. Hong Minh, N. Thanh Binh, D. Hoang Tung et al., Size-dependent optical properties and exciton self-trapping emission in carbon quantum dots, ChemistrySelect 9 (2024) e202401754.
[14] H. Singh, A. Bamrah, M. Khatri and N. Bhardwaj, One-pot hydrothermal synthesis and characterization of carbon quantum dots (cqds), Mater. Today Proc. 28 (2020) 1891.
[15] J. B. Essner, C. H. Laber and G. A. Baker, Carbon dot reduced bimetallic nanoparticles: Size and surface plasmon resonance tunability for enhanced catalytic applications, J. Mater. Chem. A 3 (2015) 16354.
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