Prosopis juliflora hydrothermal synthesis of high fluorescent carbon dots and its antibacterial and bioimaging applications

Abstract

Carbon dots have stimulated the curiosity of biomedical researchers due to their unique properties, such as less toxicity and high biocompatibility. The synthesis of carbon dots for biomedical application is a core area in research. In the current research, an eco-friendly hydrothermal technique was employed to synthesize high fluorescent, plant-derived carbon dots from Prosopis juliflora leaves extract (PJ-CDs). The synthesized PJ-CDs were investigated by physicochemical evaluation instruments such as fluorescence spectroscopy, SEM, HR-TEM, EDX, XRD, FTIR, and UV-Vis. The UV-Vis absorption peaks obtained at 270 nm due to carbonyl functional groups shifts of n→π*. In addition, a quantum yield of 7.88 % is achieved. The synthesized PJ-CDs showing the presence of carious functional groups O–H, C–H, C=O, O–H, C–N and the obtained particles in spherical shape with an average size of 8 nm. The fluorescence PJ-CDs showed stability against various environmental factors such as a broad range of ionic strength and pH gradient. The antimicrobial activity of PJ-CDs was tested against a Staphylococcus aureus, and a Escherichia coli. The results suggest that the PJ-CDs could substantially inhibit the growth of Staphylococcus aureus. The findings also indicate that PJ-CDs are effective materials for bio-imaging in Caenorhabditis elegans and they can be also used for pharmaceutical applications.

Functional carbon dots derived from biomass and plastic wastes

“…Ramasamy et al employed a hydrothermal method to synthesize plant-derived CDs from Prosopis juliflora leaves extract (PJ-CDs) for biological imaging of Caenorhabditis elegans . 160 The biological imaging study using PJ-CDs revealed no significant reduction in cell viability, even at concentrations as high as 1 mg ml −1 . Additionally, no morphological changes were observed after incubation with PJ-CDs, indicating the low toxicity and excellent biocompatibility of PJ-CDs.…”

Plant Extract-Derived Carbon Dots as Cosmetic Ingredients

“…Thus, the technique offers versatility and reproducibility in generating C-dots with the desired characteristics. For instance, Prathap et al (2023) utilized a hydrothermal method to produce highly fluorescent plant extract-derived C-dots from Prosopis juliflora (P. juliflora) leaf extract [16]. The P. juliflora-derived C-dots exhibited emission/excitation peaks at wavelength of 540 nm/480 nm, and the absolute photoluminescence quantum yield was 7.88%, suggesting high photoluminescence activity [16].…”

“…For instance, Prathap et al (2023) utilized a hydrothermal method to produce highly fluorescent plant extract-derived C-dots from Prosopis juliflora (P. juliflora) leaf extract [16]. The P. juliflora-derived C-dots exhibited emission/excitation peaks at wavelength of 540 nm/480 nm, and the absolute photoluminescence quantum yield was 7.88%, suggesting high photoluminescence activity [16]. In addition, C-dots substantially inhibited the growth of Staphylococcus aureus and were powerful components for bioimaging in Caenorhabditis elegans, exhibiting potential pharmaceutical applications [16].…”

“…The P. juliflora-derived C-dots exhibited emission/excitation peaks at wavelength of 540 nm/480 nm, and the absolute photoluminescence quantum yield was 7.88%, suggesting high photoluminescence activity [16]. In addition, C-dots substantially inhibited the growth of Staphylococcus aureus and were powerful components for bioimaging in Caenorhabditis elegans, exhibiting potential pharmaceutical applications [16]. Rammanarayanan et al (2020) successfully synthesized C-dots from Guava leaf extract via a hydrothermal method [17].…”