Nanocomposites: suitable alternatives as antimicrobial agents

Edirisinghe, Mohan; Ciric, Lena

doi:10.1088/1361-6528/aabbff

Cited by 65 publications

(44 citation statements)

References 179 publications

(222 reference statements)

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“…Biocompatibility of nanocellulose makes it potential candidate for biomedical applications . Previous reports on nanocellulose‐Ag NPs composites showed that it can be utilized for various biological applications . Poly(methacrylic acid) (PMAA) protected Ag NP functionalized CNF films showed fluorescence and antimicrobial activity .…”

Section: Introductionmentioning

confidence: 94%

“…Recently, Nanocellulose is explored as matrix material for the fabrication of inorganic‐organic nanocomposites as it can provide synergistic properties with environmentally benign and energy efficient production routes. Nanocellulose based composites integrated with optical, electronic, magnetic and mechanical properties of inorganic nanomaterials showed broad range of applications like catalyst, energy storage, sensors, electronics, water purification, antimicrobial properties etc.…”

Section: Introductionmentioning

confidence: 99%

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Antimicrobial Activity of Composite Consisting of Cellulose Nanofibers and Silver Nanoparticles

et al. 2019

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In this work influence of silver (Ag) nanoparticles (NPs) on cellulose nanofibers (CNF) was investigated. Free standing composite films of CNF/ polyvinylalcohol (PVA) ‐ Ag NPs have been synthesized by ex‐situ method. Composite films with different Ag NPs content (1%, 10% and 20%) were obtained and characterized by various techniques such as UV‐visible absorption spectroscopy, field emission scanning electron microscopy (FESEM), Infrared (IR) spectroscopy and Thermo gravimetric analysis (TGA). A UV‐vis absorption spectroscopy study demonstrates that as Ag NPs content increases the optical transparency decreases. The FESEM studies of the composite films revealed the presence of Ag NPs with average size ∼ 20 nm. Infrared spectroscopy illustrates that the CNF/PVA and Ag NPs are bound through electrostatic interactions. Comparison of the thermal properties of the CNF/PVA and the CNF/PVA ‐ Ag composite films showed that the thermal stability is improved for the highest Ag content composite films. It is shown that the CNF/PVA ‐ Ag composites have potential antibacterial effects against Gram‐positive bacteria (Bacillus subtilis) and Gram‐negative bacteria (Escherichia coli).

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Antimicrobial Activity of Composite Consisting of Cellulose Nanofibers and Silver Nanoparticles

et al. 2019

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“…Both graphene and AgNPs have been combined with polymer matrices to develop antimicrobial materials [30]. Polymer nanofibrous patches containing antimicrobial agents have been fabricated via electrospinning for application in various fields [31].…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide–Silver Nanoparticle Nanohybrids: Synthesis, Characterization, and Antimicrobial Properties

et al. 2020

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Drug resistance of pathogenic microorganisms has become a global public health problem, which has prompted the development of new materials with antimicrobial properties. In this context, antimicrobial nanohybrids are an alternative due to their synergistic properties. In this study, we used an environmentally friendly one-step approach to synthesize graphene oxide (GO) decorated with silver nanoparticles (GO–AgNPs). By this process, spherical AgNPs of average size less than 4 nm homogeneously distributed on the surface of the partially reduced GO can be generated in the absence of any stabilizing agent, only with ascorbic acid (L-AA) as a reducing agent and AgNO3 as a metal precursor. The size of the AgNPs can be controlled by the AgNO3 concentration and temperature. Smaller AgNPs are obtained at lower concentrations of the silver precursor and lower temperatures. The antimicrobial properties of nanohybrids against Gram-negative bacteria Escherichia coli and Pseudomonas aeruginosa, Gram-positive Staphylococcus aureus, and the yeast Candida albicans were found to be concentration- and time-dependent. C. albicans and S. aureus showed the highest susceptibility to GO–AgNPs. These nanohybrids can be used as nanofillers in polymer nanocomposites to develop materials with antimicrobial activity for applications in different areas, and another potential application could be cancer therapeutic agents.

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“…The atoms also have a weakly delocalized π‐electron cloud that is orientated in the z‐axis (Greshnov, 2014; Luo, Qiu, Lu, & Ni, 2013; Novoselov et al., 2007). The antibacterial properties of carbonaceous nanomaterials have been widely investigated and reported in the literature; however, their antiviral properties are unknown (Matharu, Ciric, & Edirisinghe, 2018; Matharu, Ciric, et al, 2018; Matharu et al., 2018, 2020). Studying the interaction between graphene nanomaterials and viral pathogens is of immense interest, to allow for the development of new antiviral treatments.…”

Section: Introductionmentioning

confidence: 99%

Viral filtration using carbon‐based materials

et al. 2020

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Viral infections alone are a significant cause of morbidity and mortality worldwide and have a detrimental impact on global healthcare and socio‐economic development. The discovery of novel antiviral treatments has gained tremendous attention and support with the rising number of viral outbreaks. In this work, carbonaceous materials, including graphene nanoplatelets and graphene oxide nanosheets, were investigated for antiviral properties. The materials were characterized using scanning electron microscopy and transmission electron microscopy. Analysis showed the materials to be two‐dimensional with lateral dimensions ranging between 1 and 4 µm for graphene oxide and 110 ± 0.11 nm for graphene nanoplatelets. Antiviral properties were assessed against a DNA virus model microorganism at concentrations of 0.5, 1.0 and 2.0 wt/v%. Both carbonaceous nanomaterials exhibited potent antiviral properties and gave rise to a viral reduction of 100% across all concentrations tested. Graphene oxide nanosheets were then incorporated into polymeric fibres, and their antiviral behaviour was examined after 3 and 24 hr. A viral reduction of 39% was observed after 24 hr of exposure. The research presented here showcases, for the first time, the antiviral potential of several carbonaceous nanomaterials, also included in a carrier polymer. These outcomes can be translated and implemented in many fields and devices to prevent viral spread and infection.

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Nanocomposites: suitable alternatives as antimicrobial agents

Cited by 65 publications

References 179 publications

Antimicrobial Activity of Composite Consisting of Cellulose Nanofibers and Silver Nanoparticles

Antimicrobial Activity of Composite Consisting of Cellulose Nanofibers and Silver Nanoparticles

Graphene Oxide–Silver Nanoparticle Nanohybrids: Synthesis, Characterization, and Antimicrobial Properties

Viral filtration using carbon‐based materials

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