Bactericidal coating of paper towels via sustainable biosynthesis of silver nanoparticles using Ocimum sanctum leaf extract

Jacob, Jaya Mary; John, Merin Sara; Jacob, Aleena; Abitha, P; Kumar, Sruthy S; Rajan, Reju; Suganthy, Natarajan; Pugazhendhi, Arivalagan

doi:10.1088/2053-1591/aafaed

Cited by 63 publications

(33 citation statements)

References 49 publications

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“…Researchers have also demonstrated that silver nanoparticles release silver ions faster in acidic solution than they do in neutral solution. 16 Gram-negative bacteria are more susceptible to silver nanoparticles. 17 The cellular wall of gram-negative bacteria is narrower than that of gram-positive strains.…”

Section: Antibacterial Mechanism Of Silver Nanoparticlesmentioning

confidence: 99%

The Antibacterial Mechanism of Silver Nanoparticles and Its Application in Dentistry

Yin¹,

Zhang²,

Zhao³

et al. 2020

IJN

1,224

681

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Nanotechnology has recently emerged as a rapidly growing field with numerous biomedical science applications. At the same time, silver has been adopted as an antimicrobial material and disinfectant that is relatively free of adverse effects. Silver nanoparticles possess a broad spectrum of antibacterial, antifungal and antiviral properties. Silver nanoparticles have the ability to penetrate bacterial cell walls, changing the structure of cell membranes and even resulting in cell death. Their efficacy is due not only to their nanoscale size but also to their large ratio of surface area to volume. They can increase the permeability of cell membranes, produce reactive oxygen species, and interrupt replication of deoxyribonucleic acid by releasing silver ions. Researchers have studied silver nanoparticles as antimicrobial agents in dentistry. For instance, silver nanoparticles can be incorporated into acrylic resins for fabrication of removable dentures in prosthetic treatment, composite resin in restorative treatment, irrigating solution and obturation material in endodontic treatment, adhesive materials in orthodontic treatment, membrane for guided tissue regeneration in periodontal treatment, and titanium coating in dental implant treatment. Although not all authorities have acknowledged the safety of silver nanoparticles, no systemic toxicity of ingested silver nanoparticles has been reported. A broad concern is their potential hazard if they are released into the environment. However, the interaction of nanoparticles with toxic materials and organic compounds can either increase or reduce their toxicity. This paper provides an overview of the antibacterial use of silver nanoparticles in dentistry, highlighting their antibacterial mechanism, potential applications and safety in clinical treatment.

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Section: Antibacterial Mechanism Of Silver Nanoparticlesmentioning

confidence: 99%

The Antibacterial Mechanism of Silver Nanoparticles and Its Application in Dentistry

Yin¹,

Zhang²,

Zhao³

et al. 2020

IJN

1,224

681

View full text Add to dashboard Cite

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“…The intensive diffraction peak at 38.1°, which is related to the {111} lattice plane of face-centered cubic silver, indicates that pure AgNPs were formed. 21,48 The diffraction planes of the mPEGTH2-AgNPs indicated the presence of a typical face-centered cubic structure of silver, according to the available literature (Joint Committee on Powder Diffraction Standards, JCPDS file No 04-0783).…”

Section: Edx and Xrd Analysismentioning

confidence: 88%

“…Furthermore, during the synthesatic process, numerous toxic and hazardous byproducts are generated. 20 Unlike chemical methods used for AgNPs synthesis, biological methods 21 are simple, rapid, non-toxic, dependable, and green; additionally, the AgNPs produced are of well-defined size and morphology under optimized conditions. However, particle characterization is necessary because the physicochemical properties of the particles could have a significant impact on their biological properties.…”

Section: Introductionmentioning

confidence: 99%

“…In this green chemistry approach, researchers have used several different types of bacteria. 21,[24][25][26] Additionally, several biomolecules, such as biopolymers, 27 starch, 28 and amino acids 29 have been used. The use of biological molecules for the synthesis of AgNPs is eco-friendly and environmentally safe, and appeared to be useful for controlling of particle size and shape, which is an important factor in biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

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Simple Approaches for the Synthesis of AgNPs in Solution and Solid Phase Using Modified Methoxypolyethylene Glycol and Evaluation of Their Antimicrobial Activity

El‐Faham¹,

Al-Rasheed²,

Sholkamy³

et al. 2020

IJN

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Purpose: Simple methodology for preparation of metal nanoparticles such as AgNPs uses an methanolic aqueous medium at room temperature or a solvent-free procedure under microwave irradiation. The prepared AgNPs showed a significant antimicrobial effect against Gram-positive bacteria, Gram-negative bacteria, and fungi. Methods: The modified methoxypolyethylene glycol bishydrazino-s-triazine (mPEGTH2) showed remarkable activity for reducing Ag + to Ag 0 in an aqueous methanolic solution and using a solvent-free method (solid phase) under microwave irradiation. In the solid phase synthesis, the size and shape of the AgNPs can be controlled by varying the weight ratio of mPEGTH2 to AgNO 3 used. In addition, the antimicrobial activity depends on the ratio of mPEGTH2 to AgNO 3. The mPEGTH2-AgNPs (2:1) demonstrated higher antimicrobial activity compared to mPEGTH2-AgNPs (1:1) against Gram-positive bacteria, Gram-negative bacteria, and C.albicans. Results: This work presents simple methods for the synthesis of AgNPs using modified methoxypolyethylene glycol with bishydrazino-s-triazine (mPEGTH2); a solution method, using methanol-water medium at room temperature, and a solvent-free (solid phase) method, employing microwave irradiation or direct heating which could be used for the preparation of AgNPs on large scale. In the solid phase, ratios of mPEGTH2 to AgNO 3 (1:1 or 2:1, respectively) are very important to control the size and shape of AgNPs. While in solution phase is not necessary where the molar ratio used is 10:1. Most of the experimental methods resulted in AgNPs ranging in size from 7 to 10 nm as observed from XRD and TEM characterization. The antimicrobial activity of the AgNPs was also dependent on the weight ratio of mPEGTH2 to AgNO 3 , with a large effect as observed when using the solvent-free method. The mPEGTH2-AgNPs (2:1) demonstrated higher antimicrobial activities compared to mPEGTH2-AgNPs (1:1) against S. aureus, S. epidermidis, E. faecalis, E. coli, P. aeruginosa, S. typhimurium, and C. albicans. In all cases, the MICs and MBCs of mPEGTH2-AgNPs (1:1) were lower than those of mPEGTH2-AgNPs (2:1). Conclusion: In summary, mPEGTH2-AgNPs (2:1) is a promising candidate to kill pathogenic microbes. In particular, the method used for the preparation of AgNPs by using polyethylene glycol polymer modified with bishydrazino-s-triazine has the most potential and would be the most cost-effective method. This method of the synthesis of nanoparticles may be suitable for the preparation of other metal nanoparticles, which would allow for numerous applications in medicinal and industrial.

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“…Comparing with bacterial cells, freeze-dried metal nanoparticles can be easily immobilized and stored. 57 Combining with the above advantages, the bimetallic Au-AgNPs with high efficiency of MG detoxification, we believe, have considerable application prospect in bioremediation.…”

Section: Reusability Of Drp-au-agnpsmentioning

confidence: 95%

Functionalized Gold and Silver Bimetallic Nanoparticles Using Deinococcus radiodurans Protein Extract Mediate Degradation of Toxic Dye Malachite Green

Weng¹,

Li²,

Ding³

et al. 2020

IJN

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Background: Biodegradation of toxic organic dye using nanomaterial-based microbial biocatalyst is an ecofriendly and promising technique. Materials and Methods: Here, we have investigated the novel properties of functionalized Au-Ag bimetallic nanoparticles using extremophilic Deinococcus radiodurans proteins (Drp-Au-AgNPs) and their degradation efficiency on the toxic triphenylmethane dye malachite green (MG). Results and Discussion: The prepared Drp-Au-AgNPs with an average particle size of 149.8 nm were capped by proteins through groups including hydroxyl and amide. Drp-Au-AgNPs demonstrated greater degradation ability (83.68%) of MG than D. radiodurans cells and monometallic AuNPs. The major degradation product was identified as 4-(dimethylamino) benzophenone, which is less toxic than MG. The degradation of MG was mainly attributed to the capping proteins on Drp-Au-AgNPs. The bimetallic NPs could be reused and maintained MG degradation ability (>64%) after 2 cycles. Conclusion: These results suggest that the easily prepared Drp-Au-AgNPs have potential applications as novel nanomedicine for MG detoxification, and nanomaterial for biotreatment of a toxic polyphenyl dye-containing wastewater.

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Bactericidal coating of paper towels via sustainable biosynthesis of silver nanoparticles using Ocimum sanctum leaf extract

Cited by 63 publications

References 49 publications

<p>The Antibacterial Mechanism of Silver Nanoparticles and Its Application in Dentistry</p>

<p>The Antibacterial Mechanism of Silver Nanoparticles and Its Application in Dentistry</p>

<p>Simple Approaches for the Synthesis of AgNPs in Solution and Solid Phase Using Modified Methoxypolyethylene Glycol and Evaluation of Their Antimicrobial Activity</p>

<p>Functionalized Gold and Silver Bimetallic Nanoparticles Using <em>Deinococcus radiodurans</em> Protein Extract Mediate Degradation of Toxic Dye Malachite Green</p>

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