Green synthesis of gardenia seeds-based carbon dots for bacterial imaging and antioxidant activity in aqueous and oil samples

Abstract

Gardenia seed carbon dots: bacterial imaging and antioxidant activity.

Green Synthesis of Carbon Quantum Dots and Carbon Quantum Dot-Gold Nanoparticles for Applications in Bacterial Imaging and Catalytic Reduction of Aromatic Nitro Compounds

“…In this mechanism, the CQDs might bind to cell surface receptors first before they can be transported into the cell. 10 As depicted in Figure 2 A, bacteria without CQDs did not exhibit any PL emission, while bacteria with CQDs showed clear PL signal uniformly throughout the cells, confirming the facile passage of CQDs through the cell membranes and their subsequent uptake by the cells. These observations strongly suggest the accumulation of the synthesized CQDs in both the cell membranes and cytoplasm.…”

“… 9 In recent years, studies have identified gardenia seeds as a viable carbon source for synthesizing CQDs. 10 , 11 The gardenia seeds are rich in functional groups on their surface, and deriving CQDs from plant seeds aligns with the principles of waste utilization, offering a sustainable, environmentally friendly, low-toxicity, and green synthesis approach for CQDs. 12 , 13 However, some drawbacks exist in these methods such as stringent synthesis conditions and relatively long reaction times.…”

“…In recent years, studies have identified gardenia seeds as a viable carbon source for synthesizing CQDs. , The gardenia seeds are rich in functional groups on their surface, and deriving CQDs from plant seeds aligns with the principles of waste utilization, offering a sustainable, environmentally friendly, low-toxicity, and green synthesis approach for CQDs. , However, some drawbacks exist in these methods such as stringent synthesis conditions and relatively long reaction times. Researchers have explored the use of pyrolysis as an alternative method for CQDs synthesis. , Pyrolysis presents the advantages of simplicity and ease of operation, requiring no expensive instruments or chemicals, making it cost-effective. CQDs synthesized through pyrolysis exhibit excellent biocompatibility, optical stability, and high quantum yields, leading to widespread applications in fields such as biodetection, cell imaging, and biomedicine .…”

“…Researchers have explored the use of pyrolysis as an alternative method for CQDs synthesis. 10 , 14 Pyrolysis presents the advantages of simplicity and ease of operation, requiring no expensive instruments or chemicals, making it cost-effective. CQDs synthesized through pyrolysis exhibit excellent biocompatibility, optical stability, and high quantum yields, leading to widespread applications in fields such as biodetection, cell imaging, and biomedicine.…”

“…Common methods for synthesizing CQDs include electrochemical methods, hydrothermal methods, microwave-assisted synthesis, ultrasound-assisted synthesis, oxidation methods, and reduction methods . In recent years, studies have identified gardenia seeds as a viable carbon source for synthesizing CQDs. , The gardenia seeds are rich in functional groups on their surface, and deriving CQDs from plant seeds aligns with the principles of waste utilization, offering a sustainable, environmentally friendly, low-toxicity, and green synthesis approach for CQDs. , However, some drawbacks exist in these methods such as stringent synthesis conditions and relatively long reaction times. Researchers have explored the use of pyrolysis as an alternative method for CQDs synthesis. , Pyrolysis presents the advantages of simplicity and ease of operation, requiring no expensive instruments or chemicals, making it cost-effective.…”