Plasmon-enhanced visible-light photocatalytic antibacterial activity of metal–organic framework/gold nanocomposites

Guo, Wenfeng; Gao, Wenxing; Li, Qiang; Qu, Shaojian; Zhang, Lianbing; Tan, Li‐Li; Li, Shang

doi:10.1039/d2ta09061a

Cited by 21 publications

(6 citation statements)

References 55 publications

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“…In contrast, the absorption edge of AuKN showed a significant red-shift, and an absorption peak could be observed at 520 nm, attributing to the surface plasmon resonance (SPR) band of Au NPs. 46 The results indicated that the modification with Au NPs tuned the light absorption of KN from ultraviolet region to visible light, and it was consistent with the existent papers. Raja et al modified potassium niobate with palladium nanoparticles, and the SPR effect of palladium adjusted the light absorption of potassium niobate toward visible light.…”

Section: Characterization Of Aukn-lasupporting

confidence: 89%

“…Pure KN exhibited an absorption band at the edge of 400 nm, indicating its strong absorption in the ultraviolet region. In contrast, the absorption edge of AuKN showed a significant red-shift, and an absorption peak could be observed at 520 nm, attributing to the surface plasmon resonance (SPR) band of Au NPs . The results indicated that the modification with Au NPs tuned the light absorption of KN from ultraviolet region to visible light, and it was consistent with the existent papers.…”

Section: Resultsmentioning

confidence: 99%

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Reactive Oxygen Species Responsive Nitric Oxide Release for Enhanced Photodynamic Antibacterial Therapy of Scaffolds

Qi,

Liu,

et al. 2024

ACS Appl. Polym. Mater.

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Photodynamic therapy (PDT) presented tremendous potential for combating implant-related infections, but its antibacterial efficacy was constrained by rapid electron−hole pair recombination of photosensitizers and barrier action of a dense biofilm on reactive oxygen species (ROS). Herein, a cascade phototherapeutic AuKN-LA nanosystem was constructed by depositing Au nanoparticles and L-arginine (LA) on potassium niobate (KN) photosensitizer. In the nanosystem, Au nanoparticles with lower Fermi levels could capture photogenerated electrons and thus suppress electron−hole pair recombination to enhance ROS generation. Especifically, L-arginine could cascade trigger by the generated ROS to release nitric oxide (NO) to destroy the biofilm, thereby facilitating the entry of ROS. Furthermore, NO itself possessed antibacterial activity, which could form synergy with PDT. Then, the nanosystem was introduced into poly(L-lactic acid) scaffolds fabricated by laser additive manufacturing. Photoelectrochemical and ROS analysis proved that the electron−hole pair separation was improved, significantly increasing ROS generation. NO detection and crystal violet staining showed that the scaffolds could effectively remove the biofilm by sustainably releasing NO under light irradiation. As a consequence, the scaffolds exhibited excellent antibacterial rates of 98.7% and 99.2% against E. coli and S. aureus, respectively, by disrupting bacterial cell membranes and causing leakage of nucleic acid molecules and proteins.

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Section: Characterization Of Aukn-lasupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Reactive Oxygen Species Responsive Nitric Oxide Release for Enhanced Photodynamic Antibacterial Therapy of Scaffolds

Qi,

Liu,

et al. 2024

ACS Appl. Polym. Mater.

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“…46,47 Researchers have studied and reported air filters and masks endowed with photo-responsive properties. [48][49][50][51] Li et al investigated the potential of metal-organic frameworks (MOFs) for air pollution control and personal protection, focusing on a zinc-imidazolate MOF with photocatalytic bactericidal properties. 48 The fabricated MOF-based air filters not only achieve efficient particulate matter removal but also demonstrate remarkable photocatalytic antibacterial behavior.…”

Section: Introductionmentioning

confidence: 99%

Engineering surgical face masks with photothermal and photodynamic plasmonic nanostructures for enhancing filtration and on-demand pathogen eradication

Haghighat Bayan,

Rinoldi,

Rybak

et al. 2024

Biomater. Sci.

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“…Metallic NPs have demonstrated their versatility over the decades, owing to their adjustable size, structure, morphology, composition, and fascinating optical characteristics [6][7][8]. The literature contains well-documented production procedures for numerous types of metal nanoparticles [9][10][11][12][13][14][15]. Metallic nanostructures, particularly colloidal gold NPs, are used in biomedical applications due to their ease of production, simplicity, and speed of bioconjugation [16].…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Stable Gold Nanoparticles Synthesized Using Sonochemical and Reduction Methods for Antibacterial Activity

et al. 2023

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The increasing bacterial resistance and negative impacts of the present antibacterial agents have led to the search for novel antibacterial agents. This study focuses on the influence of synthetic methods on the aggregation stability and antibacterial activity of gold nanoparticles (NPs) prepared by using sodium citrate as a reducing and capping agent against Staphylococcus aureus (S. aureus). Gold NPs were synthesized using a simple and rapid sonochemical method and compared to gold NPs synthesized using a reduction method. The physicochemical features of gold NPs were characterized using UV-vis, XRD, TEM, and zeta potential, and the TEM results showed that the sonochemical method produced monodispersed spherical gold NPs with an average diameter of 18.5 nm, while the reduction method produced NPs with an average diameter of around 20 nm. The sonochemical method produced gold NPs with excellent stability (−48 mV) compared to the reduction method (−21 mV). The gold NPs with high stability also exhibited strong antibacterial activity against S. aureus present in water, indicating their potential use in water purification processes to limit bacterial growth. The outcomes of this research are expected to significantly contribute to the creation of new drugs by paving the way for the development of novel strategies to combat pathogens using highly stable gold nanoparticles. These gold NPs, produced via the sonochemical method, have the potential to be employed as beneficial nanocompounds in the medical industry.

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Plasmon-enhanced visible-light photocatalytic antibacterial activity of metal–organic framework/gold nanocomposites

Abstract: The use of metal-organic frameworks (MOFs) to achieve excellent photocatalytic antibacterial properties have attracted considerable attention. However, insufficient visible light absorption and rapid electron-hole recombination are two crucial issues for...

Cited by 21 publications

References 55 publications

Reactive Oxygen Species Responsive Nitric Oxide Release for Enhanced Photodynamic Antibacterial Therapy of Scaffolds

Reactive Oxygen Species Responsive Nitric Oxide Release for Enhanced Photodynamic Antibacterial Therapy of Scaffolds

Engineering surgical face masks with photothermal and photodynamic plasmonic nanostructures for enhancing filtration and on-demand pathogen eradication

Comparative Analysis of Stable Gold Nanoparticles Synthesized Using Sonochemical and Reduction Methods for Antibacterial Activity

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