@article{ART003241502},
author={Varnika Singh and Gajal Singla and Vishal Kansay and Varun Dutt Sharma and Anita Bhatia and Nikhil Kumar and M. K. Bera},
title={Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays},
journal={Carbon Letters},
issn={1976-4251},
year={2025},
volume={35},
number={3},
pages={1167-1185},
doi={10.1007/s42823-024-00845-8}
TY - JOUR
AU - Varnika Singh
AU - Gajal Singla
AU - Vishal Kansay
AU - Varun Dutt Sharma
AU - Anita Bhatia
AU - Nikhil Kumar
AU - M. K. Bera
TI - Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays
JO - Carbon Letters
PY - 2025
VL - 35
IS - 3
PB - Korean Carbon Society
SP - 1167
EP - 1185
SN - 1976-4251
AB - Quantum dot nanocomposite-based luminescent materials have gained attention for solid-state lighting and optical displays. This study presents a one-step, eco-friendly hydrothermal process to synthesize nitrogen, potassium, and calcium-doped carbon quantum dots (N, K, Ca-doped CQDs) from the flower extract of Mesembryanthemum crystallinum L. (ice plant). The CQDs were characterized using HRTEM, EDX, SAED, XPS, XRD, NMR, FTIR, zeta potential, UV–Vis, and photoluminescence spectroscopy. HRTEM revealed an average particle size of 4.6 nm, with a range of 2 to 7 nm. The CQDs exhibited a quantum yield of 20%, excellent water solubility, photostability, and greenish fluorescence under UV (365 nm). The fluorescence spectra were analyzed using CIE (Commission Internationale de l’Eclairage) chromaticity coordinates to determine the emitted color. The fluorescence emission behavior was influenced by solvent polarity, locally excited (LE) states, intramolecular charge transfer (ICT) processes, and hydrogen bonding. The hydrogen bonds between N, K, Ca-doped CQDs and DI water likely enhanced the stability of the ICT state, resulting in a red shift in fluorescence. Additionally, we developed an eco-friendly wheat-starch-based bioplastic nanocomposite by embedding the CQDs. The effects of CQD concentration and pH sensitivity on luminescent properties were explored. Finally, we demonstrated a practical application by designing a conceptual nameplate-like calligraphy using the optimized CQDs@bioplastic nanocomposite film (CQD concentration: 240 mg/mL, pH: 2.7), highlighting its potential for luminescent film applications.
KW - Carbon quantum dots;Green synthesis;Luminescent nanocomposite film;Ice plant flower;Optical display
DO - 10.1007/s42823-024-00845-8
ER -
Varnika Singh, Gajal Singla, Vishal Kansay, Varun Dutt Sharma, Anita Bhatia, Nikhil Kumar and M. K. Bera. (2025). Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays. Carbon Letters, 35(3), 1167-1185.
Varnika Singh, Gajal Singla, Vishal Kansay, Varun Dutt Sharma, Anita Bhatia, Nikhil Kumar and M. K. Bera. 2025, "Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays", Carbon Letters, vol.35, no.3 pp.1167-1185. Available from: doi:10.1007/s42823-024-00845-8
Varnika Singh, Gajal Singla, Vishal Kansay, Varun Dutt Sharma, Anita Bhatia, Nikhil Kumar, M. K. Bera "Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays" Carbon Letters 35.3 pp.1167-1185 (2025) : 1167.
Varnika Singh, Gajal Singla, Vishal Kansay, Varun Dutt Sharma, Anita Bhatia, Nikhil Kumar, M. K. Bera. Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays. 2025; 35(3), 1167-1185. Available from: doi:10.1007/s42823-024-00845-8
Varnika Singh, Gajal Singla, Vishal Kansay, Varun Dutt Sharma, Anita Bhatia, Nikhil Kumar and M. K. Bera. "Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays" Carbon Letters 35, no.3 (2025) : 1167-1185.doi: 10.1007/s42823-024-00845-8
Varnika Singh; Gajal Singla; Vishal Kansay; Varun Dutt Sharma; Anita Bhatia; Nikhil Kumar; M. K. Bera. Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays. Carbon Letters, 35(3), 1167-1185. doi: 10.1007/s42823-024-00845-8
Varnika Singh; Gajal Singla; Vishal Kansay; Varun Dutt Sharma; Anita Bhatia; Nikhil Kumar; M. K. Bera. Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays. Carbon Letters. 2025; 35(3) 1167-1185. doi: 10.1007/s42823-024-00845-8
Varnika Singh, Gajal Singla, Vishal Kansay, Varun Dutt Sharma, Anita Bhatia, Nikhil Kumar, M. K. Bera. Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays. 2025; 35(3), 1167-1185. Available from: doi:10.1007/s42823-024-00845-8
Varnika Singh, Gajal Singla, Vishal Kansay, Varun Dutt Sharma, Anita Bhatia, Nikhil Kumar and M. K. Bera. "Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays" Carbon Letters 35, no.3 (2025) : 1167-1185.doi: 10.1007/s42823-024-00845-8
