Facile and green synthesis of highly fluorescent nitrogen-doped carbon dots from jackfruit seeds and its applications towards the fluorimetric detection of Au3+ ions in aqueous medium and in in vitro multicolor cell imaging
| Autor: | Vadivel Ramanan, Kaviyarasan Raji, Perumal Ramamurthy |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Photoluminescence
Fluorophore chemistry.chemical_element Quantum yield 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Ionic strength Colloidal gold Materials Chemistry 0210 nano-technology Luminescence Carbon Nuclear chemistry |
| Zdroj: | New Journal of Chemistry. 43:11710-11719 |
| ISSN: | 1369-9261 1144-0546 |
| DOI: | 10.1039/c9nj02590a |
| Popis: | Carbon dots (CDs) have drawn tremendous attention of researchers due to their excellent properties. Herein, we synthesized highly luminescent N-doped carbon dots (N-CDs) from jackfruit seeds used as a green carbon source by a facile, green and rapid one-step microwave-assisted method. The resulting N-CDs display excellent solubility in water, high photoluminescence (PL) quantum yield, QY (17.91%), high photostability, longer storage stability (stable up to more than 180 days without any agglomeration) and low cytotoxicity (90% upon addition of 0 to 2 mg mL−1 of N-CDs) towards A549 cell line. In addition, the fluorescence of N-CDs is stable in a wide range of ionic strength and pH. The PL intensity of N-CDs was linearly, selectively and sensitively quenched by Au3+ ions. So we have demonstrated Au3+ sensing in aqueous media using N-CDs as the fluorophore and achieved a limit of detection of 239 nM. We also applied the obtained N-CDs as an effective fluorescent probe for in vitro multicolor cell imaging. In addition, we also synthesized gold nanoparticles (AuNPs) by using the strategy of reductive electron transfer between N-CDs and Au3+ ions. |
| Databáze: | OpenAIRE |
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