Generation of engineered core-shell antibiotic nanoparticles

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Nanocomposite structures offer enhanced properties through rational design.
• Core-shell nanostructures can effectively incorporate and stabilize antibacterial agents.
• Developing novel antibacterial agents is crucial for combating resistant bacterial strains.

Purpose of the Study:

• To synthesize and characterize zinc oxide-curcumin (ZnO-Cum) core-shell nanoparticles.
• To evaluate the antibacterial efficacy of ZnO-Cum nanoparticles against various bacterial pathogens.
• To explore the potential of ZnO-Cum nanoparticles for antibacterial and biomedical applications.

Main Methods:

• Synthesis of ZnO-Cum core-shell nanoparticles via sonication-assisted curcumin deposition on ZnO nanoparticles.
• Characterization using transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-Visible diffuse reflectance spectroscopy (UV-DRS), and attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR).
• Antibacterial activity assessment using the diffusion method against Staphylococcus aureus, Streptococcus pneumoniae, Escherichia coli, and Shigella dysenteriae.

Main Results:

• ZnO-Cum nanoparticles exhibited a spiracle shape with approximately 45 nm ZnO cores and 12 nm curcumin shells.
• XRD, UV-DRS, and ATR-FTIR confirmed the formation of the core-shell nanocomposite structure.
• ZnO-Cum nanoparticles demonstrated superior inhibition of Gram-positive and Gram-negative bacteria compared to amoxicillin.

Conclusions:

• Zinc oxide-curcumin core-shell nanoparticles are successfully synthesized and possess significant antibacterial activity.
• The developed nanocomposite shows broad-spectrum efficacy against tested bacterial strains.
• ZnO-Cum core-shell nanoparticles hold promise for future antibacterial and biomedical applications.