Unveiling the photocatalytic and antimicrobial activities of star–shaped gold nanoparticles under visible spectrum DOI Creative Commons
Ahmed M. El‐Khawaga,

Amir Elsaidy,

Miguel A. Correa‐Duarte

и другие.

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Янв. 7, 2025

This study reports on the facile development of star-shaped gold nanoparticles via seed-mediated growth protocol. Gold nanostars (AuNSTs) demonstrated average particle size 48 nm using transmission electron microscopy (TEM). Chemical composition AuNSTs was verifired energy dispersive X-ray spectroscopy (EDX) mapping. high optical response under visible spectrum, with maximum absorption at 685 nm, UV-Vis spectroscopy. Therefore could be involoved into photocatalytic reaction spectrum. superior performance in degradation rhodamine B dye (RB), and disinfection some pathogenic bacteria. offered enhanced removal efficiency against (82.0 ± 0.35% 135 min) irradiation. Remarkably, proper conditions pH = 9, approximately 94 0.55% a 10 ppm RB solution effectively photodegraded after min; this ascribed to strong electrostatic attraction between negatively charged surface positive contaminant. activity correlated interfacial charge transfer for Au, pair separation Additionally, exhibited potential antibacterial Escherichia coli (E. coli) Staphylococcus aureus (S. aureus). substantial disk diffusion microbroth dilution tests zones inhibition minimum inhibitory concentrations (MIC) E. (20.0 0.54 mm, 1.25 µg/ml) S. (23.0 0.35 0.625 µg/ml), respectively. In conclusion, efficient capabilities along significant antimicrobial gram-positive gram-negative bacterial strains.

Язык: Английский

Unveiling the photocatalytic and antimicrobial activities of star–shaped gold nanoparticles under visible spectrum DOI Creative Commons
Ahmed M. El‐Khawaga,

Amir Elsaidy,

Miguel A. Correa‐Duarte

и другие.

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Янв. 7, 2025

This study reports on the facile development of star-shaped gold nanoparticles via seed-mediated growth protocol. Gold nanostars (AuNSTs) demonstrated average particle size 48 nm using transmission electron microscopy (TEM). Chemical composition AuNSTs was verifired energy dispersive X-ray spectroscopy (EDX) mapping. high optical response under visible spectrum, with maximum absorption at 685 nm, UV-Vis spectroscopy. Therefore could be involoved into photocatalytic reaction spectrum. superior performance in degradation rhodamine B dye (RB), and disinfection some pathogenic bacteria. offered enhanced removal efficiency against (82.0 ± 0.35% 135 min) irradiation. Remarkably, proper conditions pH = 9, approximately 94 0.55% a 10 ppm RB solution effectively photodegraded after min; this ascribed to strong electrostatic attraction between negatively charged surface positive contaminant. activity correlated interfacial charge transfer for Au, pair separation Additionally, exhibited potential antibacterial Escherichia coli (E. coli) Staphylococcus aureus (S. aureus). substantial disk diffusion microbroth dilution tests zones inhibition minimum inhibitory concentrations (MIC) E. (20.0 0.54 mm, 1.25 µg/ml) S. (23.0 0.35 0.625 µg/ml), respectively. In conclusion, efficient capabilities along significant antimicrobial gram-positive gram-negative bacterial strains.

Язык: Английский

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