ArticleNanomaterials (Basel, Switzerland)2021
One-Pot Synthesis of Bright Blue Luminescent N-Doped GQDs: Optical Properties and Cell Imaging.
Article in Nanomaterials (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed.
- High-affinity nitrogen-doped graphene quantum dots for selectiveRSC advances · 2026Article
- Graphene Quantum Dots from Agricultural Wastes: Green Synthesis and Advanced Applications for Energy Storage.Molecules (Basel, Switzerland) · 2024Article
- Article
- Photothermal therapy using graphene quantum dots.APL bioengineering · 2023Review
- Lights and Dots toward Therapy-Carbon-Based Quantum Dots as New Agents for Photodynamic Therapy.Pharmaceutics · 2023Review
- Self-Assembled Nanocomposites and Nanostructures for Environmental and Energic Applications.Nanomaterials (Basel, Switzerland) · 2023Article
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5 authors.
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Abstract
High fluorescent graphene quantum dots (GQDs) are promising in bioimaging and optoelectronics. In this paper, bright blue fluorescent N-doped GQDs were synthesized using a ultrasonic-assisted hydrothermal method. The morphology, structure, surface chemistry, optical properties, and stability subject to photo-bleaching, temperature, pH and preservation period for the N-GQDs were investigated in detail using various microscopy and spectroscopy techniques. The results showed that the N-GQDs possessed an average size of 2.65 nm, 3.57% N doping, and up to 54% quantum yield (QY). The photoluminescence (PL) spectra of the N-GQDs are excitation dependent when excited in the range of 300-370 nm and excitation independent in the range of 380-500 nm for the core and surface states emission. The N-GQDs showed excellent photo-bleaching resistance and superior photo-stability. At room temperature and in the pH range of 3-8, the fluorescence of the N-GQDs was almost invariable. The N-GQDs can be stably preserved for at least 40 days. The average decay lifetime of the N-GQDs was 2.653 ns, and the radiative and nonradiative decay rate constants were calculated to be 2.04 × 10
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