@article{ART003241502},
author={Singh Varnika and Singla Gajal and Kansay Vishal and Sharma Varun Dutt and Bhatia Anita and Kumar Nikhil and Bera M. K.},
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 - Singh Varnika
AU - Singla Gajal
AU - Kansay Vishal
AU - Sharma Varun Dutt
AU - Bhatia Anita
AU - Kumar Nikhil
AU - Bera M. K.
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 -
Singh Varnika, Singla Gajal, Kansay Vishal, Sharma Varun Dutt, Bhatia Anita, Kumar Nikhil and Bera M. K.. (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.
Singh Varnika, Singla Gajal, Kansay Vishal, Sharma Varun Dutt, Bhatia Anita, Kumar Nikhil and Bera M. K.. 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
Singh Varnika, Singla Gajal, Kansay Vishal, Sharma Varun Dutt, Bhatia Anita, Kumar Nikhil, Bera M. K. "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.
Singh Varnika, Singla Gajal, Kansay Vishal, Sharma Varun Dutt, Bhatia Anita, Kumar Nikhil, Bera M. K.. 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
Singh Varnika, Singla Gajal, Kansay Vishal, Sharma Varun Dutt, Bhatia Anita, Kumar Nikhil and Bera M. K.. "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
Singh Varnika; Singla Gajal; Kansay Vishal; Sharma Varun Dutt; Bhatia Anita; Kumar Nikhil; Bera M. K.. 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
Singh Varnika; Singla Gajal; Kansay Vishal; Sharma Varun Dutt; Bhatia Anita; Kumar Nikhil; Bera M. K.. 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
Singh Varnika, Singla Gajal, Kansay Vishal, Sharma Varun Dutt, Bhatia Anita, Kumar Nikhil, Bera M. K.. 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
Singh Varnika, Singla Gajal, Kansay Vishal, Sharma Varun Dutt, Bhatia Anita, Kumar Nikhil and Bera M. K.. "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
