Aluminum plasmonic nanoshielding in ultraviolet inactivation of bacteria

Kunz, Jeremy N.; Voronine, Dmitri V.; Lü, Weigang; Liege, Zachary; Lee, Ho Wai Howard; Zhang, Zhenrong; Scully, Marlan O.

doi:10.1038/s41598-017-08593-8

Cited by 19 publications

(18 citation statements)

References 67 publications

(71 reference statements)

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“…This observation allowed us to speculate a possible bactericidal effect of the anodizing based on titanium oxide, which mainly make up the DURALTI ® surface treatment. Such effect became significant once applied all sanitizing agents, thus supposing a synergistic activity characterized by a photocatalytic reaction of both oxides (aluminum and titanium) under UV radiation, as was also demonstrated by different literature reports [66][67][68][69]. The similar bactericidal effects observed after alcohol treatment might be ascribed to a synergistic effect of the friction with the sterile spatula and titanium oxide [66,70] within the DURALTI ® coating.…”

Section: Discussionsupporting

confidence: 60%

Antibacterial Effect of Aluminum Surfaces Untreated and Treated with a Special Anodizing Based on Titanium Oxide Approved for Food Contact

Cerbo

Mescola

Iseppi

et al. 2020

Biology

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One of the main concerns of the food industry is microbial adhesion to food contact surfaces and consequent contamination. We evaluated the potential bacteriostatic/bactericidal efficacy of aluminum surfaces with different large-scale roughness (0.25, 0.5 and 1 μm) before and after the surface treatment with a special anodizing based on titanium oxide nanotechnology (DURALTI®) and after 3 different sanitizing treatments, e.g., UV, alcohol and a natural product named Gold lotion. Four Gram-negative (Escherichia coli ATCC 25922, Salmonella typhimurium ATCC 1402, Yersinia enterocolitica ATCC 9610 and Pseudomonas aeruginosa ATCC 27588) and four Gram-positive (Staphylococcus aureus ATCC 6538, Enterococcus faecalis ATCC 29212, Bacillus cereus ATCC 14579 and Listeria monocytogenes NCTT 10888) bacteria were screened. As far as concerns aluminum surfaces without nanotechnology surface treatment, an overall bacteriostatic effect was observed for all strains with respect to the initial inoculum that was 106 CFU/mL. Conversely, an overall bactericidal effect was observed both for Gram-negative and -positive bacteria on DURALTI®-treated aluminum disks, regardless of roughness and sanitizing treatment. These results are innovative in terms of the great potential of the antibacterial activity of nanotechnologically treated food contact surfaces and their combination with some sanitizing agents that might be exploited in the food industry.

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Section: Discussionsupporting

confidence: 60%

Antibacterial Effect of Aluminum Surfaces Untreated and Treated with a Special Anodizing Based on Titanium Oxide Approved for Food Contact

Cerbo

Mescola

Iseppi

et al. 2020

Biology

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“…The nanosheets are irregular flakes in shape with an average size of 300-400 nm and thickness of several layers (~ 10 nm). Aluminum nanosheets 46 were prepared via ultrasonication of commercial aluminum foil in ethylene glycol. The Al nanosheets were separated through centrifugation to remove the ethylene glycol and placed in a solution of pure ethanol.…”

Section: Methodsmentioning

confidence: 99%

Multi-pulse laser-induced bubble formation and nanoparticle aggregation using MoS2 nanoparticles

Lü

Sokolov

et al. 2020

Sci Rep

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Understanding of how particles and light interact in a liquid environment is vital for optical and biological applications. MoS2 has been shown to enhance nonlinear optical phenomena due to the presence of a direct excitonic resonance. Its use in biological applications is predicated on knowledge of how MoS2 interacts with ultrafast (< 1 ps) pulses. In this experiment, the interaction between two femtosecond pulses and MoS2 nanoparticles suspended in liquid is studied. We found that the laser pulses induce bubble formation on the surface of a nanoparticle and a nanoparticle aggregate then forms on the surface of the trapped bubble. The processes of formation of the bubble and the nanoparticle aggregation are intertwined.

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“…To avoid the above problems related to the human body, many alternative methods have been studied such as inactivation by using cold plasma 19 , 20 , far-UVC light (200–220 nm region) 21 – 23 , and plasmonic effects 24 , 25 . However, these methods are still based on high-energy photons or plasma jets, and their effects on the human body have not yet been clarified.…”

Section: Introductionmentioning

confidence: 99%

Transient photothermal inactivation of Escherichia coli stained with visible dyes by using a nanosecond pulsed laser

Kohmura

Igami

Tatsuno

et al. 2020

Sci Rep

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Efficient inactivation of Escherichia coli (E. coli) under visible (532 nm) pulsed light irradiation was achieved by fusion of a visible light-absorbing dye with E. coli. Inactivation experiments showed that 3-log inactivation of E. coli was obtained within 20 min under a 50 kJ/cm2 dose. This treatment time and dose magnitude were 10 times faster and 100 times lower, respectively, than the values previously obtained by using a visible femtosecond laser. The mechanism of bacterial death was modeled based on a transient photothermal evaporation effect, where a quantitative evaluation of the temperature increase was given based on the heat transfer equation. As a result of this theoretical analysis, the maximum temperature of the bacteria was correlated with the absorption ratio, pulse energy, and surface-to-volume ratio. An increase in the surface-to-volume ratio with the decreasing size of organic structures leads to the possibility of efficient inactivation of viruses and bacteria under low-dose and non-harmful-visible pulsed light irradiation. Hence, this method can be applied in many fields, such as the instantaneous inactivation of pathogenic viruses and bacteria in a safe and simple manner without damaging large organic structures.

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Aluminum plasmonic nanoshielding in ultraviolet inactivation of bacteria

Cited by 19 publications

References 67 publications

Antibacterial Effect of Aluminum Surfaces Untreated and Treated with a Special Anodizing Based on Titanium Oxide Approved for Food Contact

Antibacterial Effect of Aluminum Surfaces Untreated and Treated with a Special Anodizing Based on Titanium Oxide Approved for Food Contact

Multi-pulse laser-induced bubble formation and nanoparticle aggregation using MoS2 nanoparticles

Transient photothermal inactivation of Escherichia coli stained with visible dyes by using a nanosecond pulsed laser

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