Laser Ablation Synthesis of Hybrid Copper/Silver Nanocolloids for Prospective Application as Nanoantimicrobial Agents for Food Packaging

Picca, Rosaria Anna; Maria, Anna Di; Riháková, Lenka; Volpe, Annalisa; Lugarà, Pietro Mario; Ancona, Antonio; Cioffi, Nicola

doi:10.1557/adv.2016.336

Cited by 13 publications

(7 citation statements)

References 22 publications

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“…Besides being used as aqueous disinfectants [ 176 , 177 ], the main application of NPs is as coatings on substrates, such as textiles (synthetic polymers and cotton) and implants (polymers, ceramics and metals). Other products, including food packaging materials [ 178 , 179 ], and water [ 180 , 181 ] and air [ 182 , 183 ] filters, can also be decorated with antimicrobial NPs.…”

Section: Coatings On Substratesmentioning

confidence: 99%

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Fan

Yahia

Sacher

2021

Biology

106

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Microbes, including bacteria and fungi, easily form stable biofilms on many surfaces. Such biofilms have high resistance to antibiotics, and cause nosocomial and postoperative infections. The antimicrobial and antiviral behaviors of Ag and Cu nanoparticles (NPs) are well known, and possible mechanisms for their actions, such as released ions, reactive oxygen species (ROS), contact killing, the immunostimulatory effect, and others have been proposed. Ag and Cu NPs, and their derivative NPs, have different antimicrobial capacities and cytotoxicities. Factors, such as size, shape and surface treatment, influence their antimicrobial activities. The biomedical application of antimicrobial Ag and Cu NPs involves coating onto substrates, including textiles, polymers, ceramics, and metals. Because Ag and Cu are immiscible, synthetic AgCu nanoalloys have different microstructures, which impact their antimicrobial effects. When mixed, the combination of Ag and Cu NPs act synergistically, offering substantially enhanced antimicrobial behavior. However, when alloyed in Ag–Cu NPs, the antimicrobial behavior is even more enhanced. The reason for this enhancement is unclear. Here, we discuss these results and the possible behavior mechanisms that underlie them.

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Section: Coatings On Substratesmentioning

confidence: 99%

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Fan

Yahia

Sacher

2021

Biology

106

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“…There are many literature papers on laser interaction with hard, soft and smart materials, targeting future applications in the fields of energy production (nano-energy) and biomedicine [ 8 ], as well as recent progress in the understanding of the fundamental mechanisms involved in laser processing [ 9 ]. Such laser techniques are interesting in many regards, as they enable the processing of photovoltaic cells [ 10 ], thermoelectric materials and devices [ 11 ], micro and nanosystems for energy storage and conversion [ 12 , 13 ], biodegradable and biocompatible NPs for food packaging [ 14 ] as well as vectors for drug and gene delivery [ 15 , 16 ]. The interest towards pure and electrostatically stabilized nanocolloids is well recognized [ 17 , 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Nanoparticles Engineering by Pulsed Laser Ablation in Liquids: Concepts and Applications

et al. 2020

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Laser synthesis emerges as a suitable technique to produce ligand-free nanoparticles, alloys and functionalized nanomaterials for catalysis, imaging, biomedicine, energy and environmental applications. In the last decade, laser ablation and nanoparticle generation in liquids has proven to be a unique and efficient technique to generate, excite, fragment and conjugate a large variety of nanostructures in a scalable and clean way. In this work, we give an overview on the fundamentals of pulsed laser synthesis of nanocolloids and new information about its scalability towards selected applications. Biomedicine, catalysis and sensing are the application areas mainly discussed in this review, highlighting advantages of laser-synthesized nanoparticles for these types of applications and, once partially resolved, the limitations to the technique for large-scale applications.

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“…The LASiS method provides, instead, stable colloids without the use of reducing agents or potentially dangerous substances. Regarding antimicrobial applications and considering the preparation method herein studied, it is noteworthy that Zamiri et al proposed an LASiS route to silver-chitosan (Ag-CS) composites for biomedical applications [ 69 ], and we are presently exploring LASiS routes to multi-metal nanoantimicrobials [ 70 ]. In fact, silver and copper nano-antimicrobials exert their bioactivity by means of different mechanisms, and even considering the common aspects, they provide different releases of bioactive ions in the most diffused contact media, such as physiological solution, sweat, food matrices, etc.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic Characterization of Copper-Chitosan Nanoantimicrobials Prepared by Laser Ablation Synthesis in Aqueous Solutions

et al. 2016

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Copper-chitosan (Cu-CS) nanoantimicrobials are a novel class of bioactive agents, providing enhanced and synergistic efficiency in the prevention of biocontamination in several application fields, from food packaging to biomedical. Femtosecond laser pulses were here exploited to disrupt a Cu solid target immersed into aqueous acidic solutions containing different CS concentrations. After preparation, Cu-CS colloids were obtained by tuning both Cu/CS molar ratios and laser operating conditions. As prepared Cu-CS colloids were characterized by Fourier transform infrared spectroscopy (FTIR), to study copper complexation with the biopolymer. X-ray photoelectron spectroscopy (XPS) was used to elucidate the nanomaterials’ surface chemical composition and chemical speciation of the most representative elements. Transmission electron microscopy was used to characterize nanocolloids morphology. For all samples, ξ-potential measurements showed highly positive potentials, which could be correlated with the XPS information. The spectroscopic and morphological characterization herein presented outlines the characteristics of a technologically-relevant nanomaterial and provides evidence about the optimal synthesis parameters to produce almost monodisperse and properly-capped Cu nanophases, which combine in the same core-shell structure two renowned antibacterial agents.

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Laser Ablation Synthesis of Hybrid Copper/Silver Nanocolloids for Prospective Application as Nanoantimicrobial Agents for Food Packaging

Cited by 13 publications

References 22 publications

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Nanoparticles Engineering by Pulsed Laser Ablation in Liquids: Concepts and Applications

Spectroscopic Characterization of Copper-Chitosan Nanoantimicrobials Prepared by Laser Ablation Synthesis in Aqueous Solutions

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