The effect of fabrication conditions on optical characteristics of CQDs prepared by micro plasma
Author affiliations
DOI:
https://doi.org/10.15625/2525-2518/18033Keywords:
Nano carbon quantum dots, solution-interaction microplasma methodAbstract
Carbon quantum dots (CQDs) are emerging nanomaterials with outstanding advantages such as non-toxicity, high biocompatibility, and abundant functional groups, making them highly suitable for biological and optoelectronic applications. In this study, CQDs were synthesized using a solution-interaction microplasma method operated at atmospheric pressure. The obtained CQDs exhibit spherical morphology with particle sizes below 10 nm and demonstrate excitation-dependent fluorescence over the 350 - 650 nm wavelength range. The effects of fabrication parameters-including plasma electrode polarization, precursor concentration, and preparation time-on the optical properties of CQDs were systematically investigated. Variations in these conditions resulted in changes in fluorescence intensity, spectral width, and emission peak position, reflecting the strong dependence of optical behavior on surface states and structural features. The results confirm that microplasma synthesis enables effective tuning of CQD optical properties, providing insights into exciton self-trapped emission (EST) and supporting the development of environmentally friendly CQD-based fluorescent materials for potential display and sensing applications.Downloads
References
1. Hao S. L., Il J., Rong X., Seungju S., Jin-Wook L., Chao L., Amrita P., Sergei M., Mark S. G., Yang Y., Shigeo M., Yutaka M. - Achieving high efficiency in solution-processed perovskite solar cells using C60/C70 mixed fullerenes, ACS Appl. Mater. Interfaces 10 (2018) 39590-39598. doi.org/10.1021/acsami.8b11049.
2. Adam J. C., Mustafa K. B., Stephen A. H., Neal T. S., Christopher A. H., and Milo S. P. S. - Charged carbon nanomaterials: Redox chemistries of fullerenes, carbon nanotubes, and graphenes. Chem. Rev. 118 (2018) 7363-7408. doi.org/10.1021/acs.chemrev. 8b00128.
3. Vasilios G., Jason A. P., Jiri T., Radek Z. - Broad family of carbon nanoallotropes: Classification, chemistry, and applications of fullerenes, carbon dots, nanotubes, graphene, nanodiamonds, and combined superstructures. Chem. Rev. 115 (2015) 4744-4822. doi.org/10.1021/cr500304f.
4. Xiaoyou X., Robert R., Yunlong G., Harry J. P., Latha G., Kyle R. and Walter A. S. - Electrophoretic analysis and purification of fluorescent single-walled carbon nanotube fragments. Chem. Soc. 126 (2004) 12736-12737. doi.org/10.1021/ja040082h.
5. Xunzhi H., Yongsheng L., Xiaoxia Z., Amanda E. R., Kostya (Ken) O. - Fast microplasma synthesis of blue luminescent carbon quantum dots at ambient conditions. Plasma Process. Polym. 12 (2015) 59-65. doi.org/10.1002/ppap.201400133.
6. Chuang H., Peng X., Xuanhan Z., Wujian L. - The synthetic strategies, photoluminescence mechanisms and promising applications of carbon dots: Current state and future perspective. Carbon 186 (2022) 91-127. doi.org/10.1016/j.carbon.2021.10.002.
7. J. Zheng, Y. Wang, F. Zhang, Y. Yang, X. Liu, K. Guo, H. Wang, B. Xu. - Microwave-assisted hydrothermal synthesis of solid-state carbon dots with intensive emission for white light-emitting devices. J. Mater. Chem. C 32 (2017) 8105-8111. doi.org/10.1039/C7TC01701D.
8. Chong Q., Huaidong W., Ailing Y., Xiaoxu W. and Jie X. - Facile fabrication of highly fluorescent n-doped carbon quantum dots using an ultrasonic-assisted hydrothermal method: optical properties and cell imaging. ACS Omega 6 (2021) 32904-32916. doi.org/10.1021/acsomega.1c04903.
9. Y. P. Sun, B. Zhou, Y. Lin, W. Wang, K. A. S. Fernando, P. Pathak, M. J. Meziani, B. A. Harruff, X. Wang, H. Wang, P.G. Luo, H. Yang, M. E. Kose, B. Chen, L.M. Veca, S. Y. Xie. - Quantum-sized carbon dots for bright and colorful photoluminescence, J. Am. Chem. Soc. 24 (2006) 7756-7757. doi: 10.1021/ja062677d.
10. Y. Li, X. Zhong, A. E. Rider, S. A. Furman, K. Ostrikov. - Fast, energy-efficient synthesis of luminescent carbon quantum dots, Green Chem. 16(5) (2014) 2566-2570. doi: 10.1039/c3gc42562b.
11. Athanasios B. B., Georgios T., Michael A. K., Maria B., Antonios K., Dimitrios G., Aristides B., Katerina H., Ondrej K., Radek Z., Irene P., Panagiotis A., Stelios C. - Green and simple route toward boron doped carbon dots with significantly enhanced non-linear optical properties, Carbon 83 (2015) 173-179. doi.org/10.1016/j.carbon.2014.11.032
12. R. Y. Li, X. Wang, Z. J. Li, H. Y. Zhu, J. K. Li. - Folic acid-functionalized graphene quantum dots with tunable fluorescence emission for cancer cell imaging and optical detection of Hg2+, New J. Chem. 42 (2018) 4352–4360. doi.org/10.1039/C7NJ05052F.
13. Do H. T., Tran T. T., Nguyen D. C., Nguyen T. L., Nguyen V. K., Le H. M., Pham H. M., Nguyen T. T. T., Nguyen M. H., Nguyen V. P. - Facile synthesis of carbon quantum dots by plasma-liquid interaction method, Communications in Physics 27 (2017) 311-316. doi.org/10.15625/0868-3166/27/4/10867.
14. Lin L. X., Zhang S. W. - Creating high yield water soluble luminescent graphene quantum dots via exfoliating and disintegrating carbon nanotubes and graphite flakes. Chem. Commun. 48 (2012) 10177-10179. doi.org/10.1039/C2CC35559K.
15. Vikas K. S., Virendra S., Pradeep K. Y., Subhash C., Daraksha B., Vijay K., Biplob K., Mahe T. and Syed H. H. - Bright-blue-emission nitrogen and phosphorus doped carbon quantum dots as a promising nanoprobe for detection of Cr(VI) and ascorbic acid in pure aqueous solution and in living cell. New J. Chem. 42 (2018) 12990-12997. doi.org/10.1039/C8NJ02126K.
16. Ju T., Jin Z., Yunfei Z., Yiming X., Yanli S., Yunhua C., Lan D., Wen X. - Influence of group modification at the edges of carbon quantum dots on fluorescent emission. Nanoscale Research Letters, 14 (2019) 241. doi.org/10.1186/s11671-019-3079-7.
17. Fanglong Y., Ting Y., Laizhi S., Zhibin W., Zifan X., Yunchao L., Xiaohong L., Louzhen F., Zhan’ao T., Anmin C., Mingxing J., Shihe Y. - Engineering triangular carbon quantum dots with unprecedented narrow bandwidth emission for multicolored LEDs. Nature Communications, 9 (2018) 2249. doi: 10.1038/s41467-018-04635-5.
18. Shoujun Z., Yubin S., Xiaohuan Z., Jieren S., Junhu Z., Bai Y. - The photoluminescence mechanism in carbon dots (graphene quantum dots, carbon nanodots, and polymer dots): current state and future perspective. Nano Research, 8 (2015) 375-381. doi.org/10.1007/s12274-014-0644-3.
19. P. V. Duong, N. M. Hoa, L. D. Toan, P. T. Chuyen, N. T. T. Hien, P. H. Minh, N. T. Binh and L. A. Thi. - Plasma-assisted green fabrication of fluorescent carbon quantum dot-silver nanocomposites. Journal of Dispersion Science and Technology, 46 (2025) 1356-1364. https://doi.org/10.1080/01932691.2024.2440422
P. V. Duong, L. A. Thi, L. D. Toan, P. H. Minh, N.T. Binh, D. H. Tung, N. D. Lam and N. M. Hoa. - Size-Dependent Optical Properties and Exciton Self Trapping Emission in Carbon Quantum Dots. ChemistrySelect, 9 (2024) e202401754 (1 of 7). Doi.org/10.1002/slct.202401754.
Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Vietnam Journal of Sciences and Technology (VJST) is an open access and peer-reviewed journal. All academic publications could be made free to read and downloaded for everyone. In addition, articles are published under term of the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA) Licence which permits use, distribution and reproduction in any medium, provided the original work is properly cited & ShareAlike terms followed.
Copyright on any research article published in VJST is retained by the respective author(s), without restrictions. Authors grant VAST Journals System a license to publish the article and identify itself as the original publisher. Upon author(s) by giving permission to VJST either via VJST journal portal or other channel to publish their research work in VJST agrees to all the terms and conditions of https://creativecommons.org/licenses/by-sa/4.0/ License and terms & condition set by VJST.
Authors have the responsibility of to secure all necessary copyright permissions for the use of 3rd-party materials in their manuscript.
