Journal
NANOSCALE
Volume 13, Issue 7, Pages 4301-4307Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nr09131f
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Funding
- National Natural Science Foundation of China [U1905213]
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This study synthesized water-soluble and thermally stable green-emitting carbon nanodots (CNDs) with high resistance towards photo-bleaching and an ionic environment. The CNDs showed promising potential for medical applications as bio-imaging agents in T-CA cancer cells, demonstrating stable performance at high temperatures.
High stability and water solubility of fluorescent nanomaterials are considered key factors to evaluate their feasibility for fundamental applications. Herein, water-soluble and thermally stable, green-emitting carbon nanodots (CNDs) have been synthesized via a facile hydrothermal method with an average size of 1.9 nm. CNDs showed green emission centered at 544 nm with the photo-luminescence quantum yield (PLQY) of up to 10.1% under the excitation of 400 nm. The obtained CNDs demonstrated high resistance towards photo-bleaching and an ionic (KCl) environment. Moreover, the aqueous solution of CNDs exhibited excellent stability under harsh thermal conditions from 10 degrees C to 80 degrees C. The as-prepared CNDs showed stable performance at high temperatures, even after keeping them at 80 degrees C for 30 min. Furthermore, the green emissive CNDs were incubated in T-ca cancer cells for bio-imaging applications. The results indicated that CNDs can served as an effective thermally-stable bio-imaging agent in T-ca cells at the physiological temperature range of 25 degrees C-45 degrees C. Green emission and excellent thermal stability make these CNDs promising fluorescent materials for potential applications in the medical field, which requires long-wavelength fluorescence and high-temperature imaging.
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