Optimized Synthesis Approaches of Metal Nanoparticles with Antimicrobial Applications

Marinescu, Liliana; Ficai, Denisa; Oprea, Ovidiu; Marín, Anabel; Ficai, Anton; Andronescu, Ecaterina; Holban, Alina Maria

doi:10.1155/2020/6651207

Cited by 61 publications

(36 citation statements)

References 68 publications

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“…The absorption peak generated by the localized surface plasmon resonance is the main characteristic of the UV-Vis spectrum for Ag NPs [69]. It can be observed at wavelengths starting from 400 nm up to 600 nm depending on Ag NPs shape and size [70][71][72]. In addition, UV-Vis spectra can be used to monitor the stability of the Ag NPs suspension.…”

Section: Uv-vis and Fluorescence Spectroscopy Uv-vis Spectroscopymentioning

confidence: 99%

Antibacterial Biodegradable Films Based on Alginate with Silver Nanoparticles and Lemongrass Essential Oil–Innovative Packaging for Cheese

et al. 2021

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Replacing the petroleum-based materials in the food industry is one of the main objectives of the scientists and decision makers worldwide. Biodegradable packaging will help diminish the environmental impact of human activity. Improving such biodegradable packaging materials by adding antimicrobial activity will not only extend the shelf life of foodstuff, but will also eliminate some health hazards associated with food borne diseases, and by diminishing the food spoilage will decrease the food waste. The objective of this research was to obtain innovative antibacterial films based on a biodegradable polymer, namely alginate. Films were characterized by environmental scanning electron microscopy (ESEM), Fourier-transform infrared spectroscopy (FTIR) and microscopy, complex thermal analysis (TG-DSC-FTIR), UV-Vis and fluorescence spectroscopy. Water vapor permeability and swelling behavior were also determined. As antimicrobial agents, we used silver spherical nanoparticles (Ag NPs) and lemongrass essential oil (LGO), which were found to act in a synergic way. The obtained films exhibited strong antibacterial activity against tested strains, two Gram-positive (Bacillus cereus and Staphylococcus aureus) and two Gram-negative (Escherichia coli and Salmonella Typhi). Best results were obtained against Bacillus cereus. The tests indicate that the antimicrobial films can be used as packaging, preserving the color, surface texture, and softness of cheese for 14 days. At the same time, the color of the films changed (darkened) as a function of temperature and light presence, a feature that can be used to monitor the storage conditions for sensitive food.

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Section: Uv-vis and Fluorescence Spectroscopy Uv-vis Spectroscopymentioning

confidence: 99%

Antibacterial Biodegradable Films Based on Alginate with Silver Nanoparticles and Lemongrass Essential Oil–Innovative Packaging for Cheese

et al. 2021

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“…In contrast, a zinc oxide (ZnO) nanopyramid depicted the highest biomimetic enzyme inhibition as it provides a geometrical match with the enzyme [ 133 ]. This anisotropic shape has greater antimicrobial activity because of its basal plane with a high atom density (111); these are facets that provide maximum reactivity at site [ 134 ].…”

Section: Classes Of Antimicrobial Materials For Antimicrobial Coatingmentioning

confidence: 99%

Past and Current Progress in the Development of Antiviral/Antimicrobial Polymer Coating towards COVID-19 Prevention: A Review

et al. 2021

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The astonishing outbreak of SARS-CoV-2 coronavirus, known as COVID-19, has attracted numerous research interests, particularly regarding fabricating antimicrobial surface coatings. This initiative is aimed at overcoming and minimizing viral and bacterial transmission to the human. When contaminated droplets from an infected individual land onto common surfaces, SARS-CoV-2 coronavirus is able to survive on various surfaces for up to 9 days. Thus, the possibility of virus transmission increases after touching or being in contact with contaminated surfaces. Herein, we aim to provide overviews of various types of antiviral and antimicrobial coating agents, such as antimicrobial polymer-based coating, metal-based coating, functional nanomaterial, and nanocomposite-based coating. The action mode for each type of antimicrobial agent against pathogens is elaborated. In addition, surface properties of the designed antiviral and antimicrobial polymer coating with their influencing factors are discussed in this review. This paper also exhibits several techniques on surface modification to improve surface properties. Various developed research on the development of antiviral/antimicrobial polymer coating to curb the COVID-19 pandemic are also presented in this review.

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“…For example, the morphology of platinum nanocrystals changes in the presence of oxygen gases and carbon monoxide. It should be noted that when the synthesis process is carried out in an aqueous medium, H + and OH + species are produced, the presence of which causes changes in the shape of various nanocrystals such as gold, silver, palladium and platinum [133,134]. SIO 2 , TIO 2 and Al 2 O 3 have been known as nanoparticles in the construction of mixed matrix membranes.…”

Section: Metal Nanoparticlesmentioning

confidence: 99%

Recent advances in synthesis and applications of mixed matrix membranes

2021

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Researchers are currently considering membranes separation processes due to their eco-friendly, process simplicity and high efficiency. Selecting a suitable and efficient operation is the primary concern of researchers in the field of separation industries. In recent decades, polymeric and inorganic membranes in the separation industry have made significant progress. The polymeric and inorganic membranes have been challenged due to their competitiveness in permeability and selectivity factors. A combination of nanoparticle fillers within the polymer matrix is an effective method to increase polymeric and inorganic membranes’ efficiency in separation processes. Mixed matrix membranes (MMMs) have been considered by the separation industry due to high mechanical and physicochemical, and transfer properties. Moreover, gas separation, oil treatment, heavy metal ions removal, water treatment and oil-water separation are common MMMs applications. Selecting suitable polymer blends and fillers is the key to the MMMs construction. The combination of rubbery and glassy polymers with close solubility parameters increases the MMMs performance. The filler type and synthesis methods also affect the morphological and transfer properties of MMMs significantly. Zeolites, graphene oxide (GO), nanosilica, carbon nanotubes (CNTs), zeolite imidazole frameworks (ZIFs) and metal-organic frameworks (MOFs) are used in the MMMs synthesis as fillers. Finally, solution mixing, polymerization in situ and sol-gel are the primary synthesising MMMs methods.

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Optimized Synthesis Approaches of Metal Nanoparticles with Antimicrobial Applications

Cited by 61 publications

References 68 publications

Antibacterial Biodegradable Films Based on Alginate with Silver Nanoparticles and Lemongrass Essential Oil–Innovative Packaging for Cheese

Antibacterial Biodegradable Films Based on Alginate with Silver Nanoparticles and Lemongrass Essential Oil–Innovative Packaging for Cheese

Past and Current Progress in the Development of Antiviral/Antimicrobial Polymer Coating towards COVID-19 Prevention: A Review

Recent advances in synthesis and applications of mixed matrix membranes

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