Photocatalytic antibacterial activity of nano-TiO2 (anatase)-based thin films: Effects on Escherichia coli cells and fatty acids

Joost, Urmas; Juganson, Katre; Visnapuu, Meeri; Mortimer, Monika; Kahru, Anne; Nõmmiste, E.; Kisand, Vambola; Ivask, Angela

doi:10.1016/j.jphotobiol.2014.12.010

Cited by 198 publications

(109 citation statements)

References 62 publications

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“…Significant antibacterial performances are light activated from the nanomaterial of TiO 2 nanoparticle-based film. 121 Another example of its photocatalytic properties is from nanostructured titania (nTiO 2 ). Its antibacterial activities are due to the photocatalytic effect of nTiO 2 /PU nanocomposite film when irradiated under solar illumination ( Figure 7A).…”

Section: Photocatalytic Effectsmentioning

confidence: 99%

Antibacterial properties and toxicity from metallic nanomaterials

Vimbela¹,

Ngo²,

Fraze³

et al. 2017

IJN

474

334

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The era of antibiotic resistance is a cause of increasing concern as bacteria continue to develop adaptive countermeasures against current antibiotics at an alarming rate. In recent years, studies have reported nanoparticles as a promising alternative to antibacterial reagents because of their exhibited antibacterial activity in several biomedical applications, including drug and gene delivery, tissue engineering, and imaging. Moreover, nanomaterial research has led to reports of a possible relationship between the morphological characteristics of a nanomaterial and the magnitude of its delivered toxicity. However, conventional synthesis of nanoparticles requires harsh chemicals and costly energy consumption. Additionally, the exact relationship between toxicity and morphology of nanomaterials has not been well established. Here, we review the recent advancements in synthesis techniques for silver, gold, copper, titanium, zinc oxide, and magnesium oxide nanomaterials and composites, with a focus on the toxicity exhibited by nanomaterials of multidimensions. This article highlights the benefits of selecting each material or metal-based composite for certain applications while also addressing possible setbacks and the toxic effects of the nanomaterials on the environment.

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Section: Photocatalytic Effectsmentioning

confidence: 99%

Antibacterial properties and toxicity from metallic nanomaterials

Vimbela¹,

Ngo²,

Fraze³

et al. 2017

IJN

474

334

View full text Add to dashboard Cite

show abstract

“…11 The ROS generated in this reaction lead to the decomposition of organic compounds 11 and have demonstrated antibacterial activity toward several bacterial strains including Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus. [12][13][14] Nanoparticles, primarily silica and zirconium oxide, are currently used in dental composite resins to increase the strength properties while reducing material shrinkage during curing. 15 There is a clear opportunity to replace these with functionalized nanomaterials that could impart additional benefits, such as antibacterial TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Biocompatibility and antibacterial activity of nitrogen-doped titanium dioxide nanoparticles for use in dental resin formulations

Zane

Villamena²,

Rockenbauer³

et al. 2016

IJN

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“…SEM has 113 shown that treatment with TiO 2 NPs increases the bacterial cell volume, causes honeycomb changes in the cell membrane, and causes cytoplasmic leakage. The surface of a bacterial cell has many pits, and bits of cell debris have been observed after n-ZnO treatment, 101 resulting in reduced enzymatic activity and eventual bacterial death.…”

mentioning

confidence: 99%

“…In addition, Joost et al 113 analyzed bacterial cell chemical structure and membrane changes using X-ray photoelectron spectroscopy after saturated fatty acid and unsaturated fatty acid oxidation and decomposition. Joost et al also determined malondialdehyde (MDA) content (MDA is the most important product of membrane lipid peroxidation), and the results showed that NPs can cause oxidative decomposition of the bacterial membrane.…”

mentioning

confidence: 99%

The antimicrobial activity of nanoparticles: present situation and prospects for the future

Wang¹,

Hu²,

Shao³

2017

IJN

2,715

1,792

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Nanoparticles (NPs) are increasingly used to target bacteria as an alternative to antibiotics. Nanotechnology may be particularly advantageous in treating bacterial infections. Examples include the utilization of NPs in antibacterial coatings for implantable devices and medicinal materials to prevent infection and promote wound healing, in antibiotic delivery systems to treat disease, in bacterial detection systems to generate microbial diagnostics, and in antibacterial vaccines to control bacterial infections. The antibacterial mechanisms of NPs are poorly understood, but the currently accepted mechanisms include oxidative stress induction, metal ion release, and non-oxidative mechanisms. The multiple simultaneous mechanisms of action against microbes would require multiple simultaneous gene mutations in the same bacterial cell for antibacterial resistance to develop; therefore, it is difficult for bacterial cells to become resistant to NPs. In this review, we discuss the antibacterial mechanisms of NPs against bacteria and the factors that are involved. The limitations of current research are also discussed.

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Photocatalytic antibacterial activity of nano-TiO2 (anatase)-based thin films: Effects on Escherichia coli cells and fatty acids

Cited by 198 publications

References 62 publications

Antibacterial properties and toxicity from metallic nanomaterials

Antibacterial properties and toxicity from metallic nanomaterials

Biocompatibility and antibacterial activity of nitrogen-doped titanium dioxide nanoparticles for use in dental resin formulations

The antimicrobial activity of nanoparticles: present situation and prospects for the future

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