Synthesis, Characterization and Antimicrobial Properties of Silver Nanocomposites

Abbas, Mudassar; Naeem, Nida; Iftikhar, Hina; Latif, Usman

doi:10.5772/intechopen.74623

Cited by 15 publications

(9 citation statements)

References 52 publications

(41 reference statements)

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“…Antibacterial activity is usually attributed to electrostatic interactions between cations and the negatively charged membrane surface of bacteria and/or to other interactions between the cations and the bacteria’s RNA/DNA proteins [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. As a result, antibacterial coatings usually contain positively charged materials in the form of either small molecules (mostly metal ions such as copper [ 11 , 12 , 13 , 17 , 19 , 20 , 21 , 22 ], silver [ 17 , 18 , 21 ], zinc [ 21 , 23 , 24 ], cobalt [ 25 ], nickel [ 26 ] or polyoxometalates [ 27 , 28 ]), nanoparticles (such as silver-based nanoparticles [ 15 , 29 , 30 , 31 ], rubidium-silver-titanium oxide nanocomposites [ 32 ], phenol-based nanoparticles [ 33 ] or silica-based nanoparticles [ 31 , 34 , 35 , 36 , 37 ]) or polymeric (such as chitosan/chitin [ 38 , 39 ], modified poly(ethylene imine) [ 40 , 41 , 42 , 43 ], quaternary ammonium containing polymers [ 44 , 45 , 46 ,…”

Section: Introductionmentioning

confidence: 99%

Hybrid Antibacterial and Electro-Conductive Coating for Textiles Based on Cationic Conjugated Polymer

et al. 2020

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The development of efficient synthetic strategies for incorporating antibacterial coatings into textiles for pharma and medical applications is of great interest. This paper describes the preparation of functional nonwoven fabrics coated with polyaniline (PANI) via in situ polymerization of aniline in aqueous solution. The effect of three different monomer concentrations on the level of polyaniline coating on the fibers comprising the fabrics, and its electrical resistivities and antibacterial attributes, were studied. Experimental results indicated that weight gains of 0.7 and 3.0 mg/cm2 of PANI were achieved. These levels of coatings led to the reduction of both volume and surface resistivities by several orders of magnitude for PANI-coated polyester-viscose fabrics, i.e., from 108 to 105 (Ω/cm) and from 109 to 105 Ω/square, respectively. Fourier Transform Infrared (FTIR) Spectroscopy and Scanning Electron Microscopy (SEM) confirmed the incorporation of PANI coating with an average thickness of 0.4–1.5 µm, while Thermogravimetric Analysis (TGA) demonstrated the preservation of the thermal stability of the pristine fabrics. The unique molecular structure of PANI, consisting of quaternary ammonium ions under acidic conditions, yielded an antibacterial effect in the modified fabrics. The results revealed that all types of PANI-coated fabrics totally killed S. aureus bacteria, while PANI-coated viscose fabrics also demonstrated 100% elimination of S. epidermidis bacteria. In addition, PANI-coated, PET-viscose and PET fabrics showed 2.5 log and 5.5 log reductions against S. epidermidis, respectively.

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Section: Introductionmentioning

confidence: 99%

Hybrid Antibacterial and Electro-Conductive Coating for Textiles Based on Cationic Conjugated Polymer

et al. 2020

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“…Silver ions were also reported to induce reactive oxygen species in bacteria which leads to the destruction of the bacterial cell ( Meena et al, 2013 ; Shaikh et al, 2019 ). It has been reported that the antimicrobial activity of Ag-NPs was enhanced by the combination of polymer even at low concentrations ( Chen et al, 2016 ; Abbas et al, 2018 ; Batista et al, 2018 ). Chitosan, a cationic polysaccharide was used along with Ag-NPs to improve the antimicrobial properties of NPs ( Abdelgawad et al, 2014 ).…”

Section: Role Of Nanotechnology In Crop Protectionmentioning

confidence: 99%

Endophytic Nanotechnology: An Approach to Study Scope and Potential Applications

et al. 2021

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Nanotechnology has become a very advanced and popular form of technology with huge potentials. Nanotechnology has been very well explored in the fields of electronics, automobiles, construction, medicine, and cosmetics, but the exploration of nanotecnology’s use in agriculture is still limited. Due to climate change, each year around 40% of crops face abiotic and biotic stress; with the global demand for food increasing, nanotechnology is seen as the best method to mitigate challenges in disease management in crops by reducing the use of chemical inputs such as herbicides, pesticides, and fungicides. The use of these toxic chemicals is potentially harmful to humans and the environment. Therefore, using NPs as fungicides/ bactericides or as nanofertilizers, due to their small size and high surface area with high reactivity, reduces the problems in plant disease management. There are several methods that have been used to synthesize NPs, such as physical and chemical methods. Specially, we need ecofriendly and nontoxic methods for the synthesis of NPs. Some biological organisms like plants, algae, yeast, bacteria, actinomycetes, and fungi have emerged as superlative candidates for the biological synthesis of NPs (also considered as green synthesis). Among these biological methods, endophytic microorganisms have been widely used to synthesize NPs with low metallic ions, which opens a new possibility on the edge of biological nanotechnology. In this review, we will have discussed the different methods of synthesis of NPs, such as top-down, bottom-up, and green synthesis (specially including endophytic microorganisms) methods, their mechanisms, different forms of NPs, such as magnesium oxide nanoparticles (MgO-NPs), copper nanoparticles (Cu-NPs), chitosan nanoparticles (CS-NPs), β-d-glucan nanoparticles (GNPs), and engineered nanoparticles (quantum dots, metalloids, nonmetals, carbon nanomaterials, dendrimers, and liposomes), and their molecular approaches in various aspects. At the molecular level, nanoparticles, such as mesoporous silica nanoparticles (MSN) and RNA-interference molecules, can also be used as molecular tools to carry genetic material during genetic engineering of plants. In plant disease management, NPs can be used as biosensors to diagnose the disease.

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“…Ag-NPs are one of the most promising system to fight the emergence of pathogenic bacterial strains and the increase of resistant microorganisms resulted from the excessive use of antibiotics [67]. Nanotechnology products database 2019 reported, Ag-NCs have been used in 278 different types of product in 34 countries and 15 industries with diverse properties and applications [68,69].…”

Section: Silver Nanoparticlesmentioning

confidence: 99%

Gamma Irradiation-Assisted Synthesis of Silver Nanoparticle and Their Antimicrobial Applications: A Review

Mossa

Shameli

2021

JRNN

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This review presents an introduction to the synthesis of silver nanoparticles (Ag-NPs) by gamma irradiation method. This method offers some benefits over the conventional methods because it provides fully reduced and highly pure nanoparticles free from by-products or chemical reducing agents, and is capable of controlling the particle size and structure. The nucleation and growth mechanism of metallic nanoparticles are also discussed. The competition between nucleation and growth process in the formation of nanoparticles can determine the size of nanoparticles which is influenced by certain parameters such as the choice of solvents and stabilizer, the precursor to stabilizer ratio, pH during synthesis, and absorbed dose. The present review, summarizes the gamma irradiation synthesis of Ag-NPs procedure, advantages, applications and their antibacterial properties.

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Synthesis, Characterization and Antimicrobial Properties of Silver Nanocomposites

Cited by 15 publications

References 52 publications

Hybrid Antibacterial and Electro-Conductive Coating for Textiles Based on Cationic Conjugated Polymer

Hybrid Antibacterial and Electro-Conductive Coating for Textiles Based on Cationic Conjugated Polymer

Endophytic Nanotechnology: An Approach to Study Scope and Potential Applications

Gamma Irradiation-Assisted Synthesis of Silver Nanoparticle and Their Antimicrobial Applications: A Review

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