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| Main Authors: | , , , |
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| Format: | Artículo Open Access |
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Wiley
2025
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| Online Access: | https://onlinelibrary.wiley.com/doi/10.1111/php.70020 |
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| _version_ | 1867015985233395712 |
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| author | M. Paola Sanchez‐Castañeda Leidy T. Sanchez Diana Blach Cristian C. Villa |
| author_facet | M. Paola Sanchez‐Castañeda Leidy T. Sanchez Diana Blach Cristian C. Villa M. Paola Sanchez‐Castañeda Leidy T. Sanchez Diana Blach Cristian C. Villa |
| collection | Wiley Open Access |
| contents | Photodynamic antifungal activity of curcumin‐capped TiO ₂ nanoparticles: A colorant‐based photochemical approach for packaging applications M. Paola Sanchez‐Castañeda Leidy T. Sanchez Diana Blach Cristian C. Villa Photochemistry and Photobiology Abstract The present study explores the development, characterization, and antifungal application of curcumin‐capped titanium dioxide nanoparticles (cur–TiO 2 Nps) for photodynamic inactivation (PDI) of Aspergillus niger spores, particularly in food packaging contexts. Cur–TiO 2 Nps were synthesized via surface functionalization of anatase‐phase TiO 2 with curcumin, and their physicochemical properties were evaluated using XRD, FTIR, UV–Vis spectroscopy, and dynamic light scattering. The structural analyses confirmed the preservation of TiO 2 crystallinity with effective curcumin capping, indicated by characteristic FTIR shifts and a modest increase in the band gap from 3.31 to 3.43 eV. Photoinactivation assays under blue LED irradiation (450 nm) demonstrated that cur–TiO 2 Nps achieved significantly higher antifungal activity (up to 80% inhibition) compared with either curcumin or TiO 2 Nps alone, highlighting a synergistic interaction that enhances reactive oxygen species (ROS) generation. Further evaluation of cur–TiO 2 Nps applied to A. niger ‐contaminated food packaging surfaces—including polyethylene terephthalate (PET), expanded polystyrene (EPS), and polyvinyl chloride (PVC)—showed material‐dependent efficacy. PVC and EPS achieved superior inhibition rates (35% and 27%, respectively), while PET was less effective (~8%), likely due to differences in surface roughness, wettability, and nanoparticle adhesion. These results indicate that cur–TiO 2 Nps are promising candidates for use in light‐activated antimicrobial systems, particularly as part of functional food packaging strategies aimed at controlling fungal contamination and extending product shelf life through non‐thermal and residue‐free methods. 10.1111/php.70020 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| doi_str_mv | 10.1111/php.70020 |
| format | Artículo Open Access |
| id | wiley_oa_10_1111_php_70020 |
| institution | Wiley Open Access |
| license_str_mv | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| publishDate | 2025 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Photodynamic antifungal activity of curcumin‐capped TiO ₂ nanoparticles: A colorant‐based photochemical approach for packaging applications M. Paola Sanchez‐Castañeda Leidy T. Sanchez Diana Blach Cristian C. Villa Photochemistry and Photobiology Photodynamic antifungal activity of curcumin‐capped TiO ₂ nanoparticles: A colorant‐based photochemical approach for packaging applications M. Paola Sanchez‐Castañeda Leidy T. Sanchez Diana Blach Cristian C. Villa Photochemistry and Photobiology Abstract The present study explores the development, characterization, and antifungal application of curcumin‐capped titanium dioxide nanoparticles (cur–TiO 2 Nps) for photodynamic inactivation (PDI) of Aspergillus niger spores, particularly in food packaging contexts. Cur–TiO 2 Nps were synthesized via surface functionalization of anatase‐phase TiO 2 with curcumin, and their physicochemical properties were evaluated using XRD, FTIR, UV–Vis spectroscopy, and dynamic light scattering. The structural analyses confirmed the preservation of TiO 2 crystallinity with effective curcumin capping, indicated by characteristic FTIR shifts and a modest increase in the band gap from 3.31 to 3.43 eV. Photoinactivation assays under blue LED irradiation (450 nm) demonstrated that cur–TiO 2 Nps achieved significantly higher antifungal activity (up to 80% inhibition) compared with either curcumin or TiO 2 Nps alone, highlighting a synergistic interaction that enhances reactive oxygen species (ROS) generation. Further evaluation of cur–TiO 2 Nps applied to A. niger ‐contaminated food packaging surfaces—including polyethylene terephthalate (PET), expanded polystyrene (EPS), and polyvinyl chloride (PVC)—showed material‐dependent efficacy. PVC and EPS achieved superior inhibition rates (35% and 27%, respectively), while PET was less effective (~8%), likely due to differences in surface roughness, wettability, and nanoparticle adhesion. These results indicate that cur–TiO 2 Nps are promising candidates for use in light‐activated antimicrobial systems, particularly as part of functional food packaging strategies aimed at controlling fungal contamination and extending product shelf life through non‐thermal and residue‐free methods. 10.1111/php.70020 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| title | Photodynamic antifungal activity of curcumin‐capped TiO ₂ nanoparticles: A colorant‐based photochemical approach for packaging applications |
| topic | Photochemistry and Photobiology |
| url | https://onlinelibrary.wiley.com/doi/10.1111/php.70020 |