Green chemistry inspired formation of bioactive stable colloidal nanosilver and its wide-spectrum functionalised properties for sustainable industrial escalation

Das, Dipayan; Bhattacharyya, Subires; Bhattacharyya, Monidipa; Mandal, Palash

doi:10.1016/j.rechem.2022.100533

Cited by 4 publications

(4 citation statements)

References 289 publications

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“…These honey-capped AgNPs were found to kill both GNB and GPB (minimum inhibitory concentration (MIC) ranging from 1.69 to 6.25 µg mL −1 ) but were more efficient in GNB [ 119 ]. These new kinds of colloidal AgNPs are eco-friendly and biocompatible with medical and environmental applications [ 120 , 121 ]. However, biological processes lead to the formation of less homogeneous AgNPs, which require extensive or costly purification [ 122 ].…”

Section: Silver Nanoparticle (Agnp) Modelsmentioning

confidence: 99%

Nanosilver: An Old Antibacterial Agent with Great Promise in the Fight against Antibiotic Resistance

Kaiser,

Delattre,

Frost

et al. 2023

Antibiotics

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Antibiotic resistance in bacteria is a major problem worldwide that costs 55 billion USD annually for extended hospitalization, resource utilization, and additional treatment expenditures in the United States. This review examines the roles and forms of silver (e.g., bulk Ag, silver salts (AgNO3), and colloidal Ag) from antiquity to the present, and its eventual incorporation as silver nanoparticles (AgNPs) in numerous antibacterial consumer products and biomedical applications. The AgNP fabrication methods, physicochemical properties, and antibacterial mechanisms in Gram-positive and Gram-negative bacterial models are covered. The emphasis is on the problematic ESKAPE pathogens and the antibiotic-resistant pathogens of the greatest human health concern according to the World Health Organization. This review delineates the differences between each bacterial model, the role of the physicochemical properties of AgNPs in the interaction with pathogens, and the subsequent damage of AgNPs and Ag+ released by AgNPs on structural cellular components. In closing, the processes of antibiotic resistance attainment and how novel AgNP–antibiotic conjugates may synergistically reduce the growth of antibiotic-resistant pathogens are presented in light of promising examples, where antibiotic efficacy alone is decreased.

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Section: Silver Nanoparticle (Agnp) Modelsmentioning

confidence: 99%

Nanosilver: An Old Antibacterial Agent with Great Promise in the Fight against Antibiotic Resistance

Kaiser,

Delattre,

Frost

et al. 2023

Antibiotics

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“…Many more examples of nanoantioxidants engineered from natural sources, such as plant extraction, referred to in the bibliography, are listed in Table 2 , along with the antioxidant mechanism and the utilized evaluation methods. Finally, Figure 15 depicts a top-down and bottom-up synthetic approach of a phyto-synthetical Ag nanoparticles preparation [ 121 ].…”

Section: Optimizing Antioxidant Systems By Biomimetic Nanoengineeringmentioning

confidence: 99%

“… Schematic representation of ( left ) a top-down and bottom-up synthetic approach ( right ) of a phyto-synthetical Ag nanoparticles preparation. Reprinted (adapted) with permission from [ 121 ]. …”

Section: Figurementioning

confidence: 99%

Nanoantioxidant Materials: Nanoengineering Inspired by Nature

et al. 2023

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Oxidants are very active compounds that can cause damage to biological systems under specific environmental conditions. One effective way to counterbalance these adverse effects is the use of anti-oxidants. At low concentrations, an antioxidant is defined as a compound that can delay, control, or prevent an oxidative process. Antioxidants exist in plants, soil, and minerals; therefore, nature is a rich source of natural antioxidants, such as tocopherols and polyphenols. In nature, antioxidants perform in tandem with their bio-environment, which may tune their activity and protect them from degradation. In vitro use of antioxidants, i.e., out of their biomatrix, may encounter several drawbacks, such as auto-oxidation and polymerization. Artificial nanoantioxidants can be developed via surface modification of a nanoparticle with an antioxidant that can be either natural or synthetic, directly mimicking a natural antioxidant system. In this direction, state-of-the-art nanotechnology has been extensively incorporated to overcome inherent drawbacks encountered in vitro use of antioxidants, i.e., out of their biomatrix, and facilitate the production and use of antioxidants on a larger scale. Biomimetic nanoengineering has been adopted to optimize bio-medical antioxidant systems to improve stability, control release, enhance targeted administration, and overcome toxicity and biocompatibility issues. Focusing on biotechnological sciences, this review highlights the importance of nanoengineering in developing effective antioxidant structures and comparing the effectiveness of different nanoengineering methods. Additionally, this study gathers and clarifies the different antioxidant mechanisms reported in the literature and provides a clear picture of the existing evaluation methods, which can provide vital insights into bio-medical applications.

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“…Antimicrobial, wound healing, antiviral, and anti-inflammatory applications, microbial control of phytopathogens, anticancer cell targeting, and optical receptors are just some of the recent uses for Ag-NPs. These have also been used as catalysts in chemistry, biosensors, antioxidants, and even for the delivery of DNA [6]. The novel stability, catalytic activity, biocompatibility, high conductivity, and huge surface area-to-volume ratio of Ag-NPs may account for their wide range of applications.…”

Section: Introductionmentioning

confidence: 99%

Carica papaya Crude Extracts Are an Efficient Source of Environmentally Friendly Biogenic Synthesizers of Silver Nanoparticles

Jahangir,

Anjum,

Rashid

et al. 2023

Sustainability

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Metallic nanoparticles are very useful, effective, and usually synthesized by toxic and expensive chemicals. Silver nanoparticles (AgNPs), measuring less than 100 nm, have shown promising impact in several biomedical investigations. These can inhibit microbial growth and aid in medicine administration. Six substrates of Carica papaya were used to synthesize silver nanoparticles that can limit the growth of bacteria and fungi. In this article, we report the synthesis of AgNPs from the leaf, seed, callus, peel, fruit juice, and bark of Carica papaya. AgNPs synthesized from callus showed the most promising results when tested against the growth of bacteria like Xanthomonas campestris, Erwinia carotovera, Bacillus subtilis, and fungi (Aspergillus niger and Fusarium oxysporum) when compared with other extracts’ efficacy, and the callus was regenerated from petiole and midrib explants of Carica papaya in MS basal media supplemented with NAA and Kinetin (1 + 0.5 mg/L). A ratio of 1:20 of substrate extract to 1 mM AgNO3 produced the most effective nanoparticles in terms of capping, quality, and stability when tested through surface plasmon resonance (SPR) within the 400–435 nm range. The nanoparticle sizes of all six types were measured using Image J software on micrographs of SEM at 200 nm resolution. The average diameters were analyzed through Origin software, and the finest AgNPs were observed to be synthesized from callus extract, i.e., 18.91 nm with rod-like morphology. Energy dispersive X-ray (EDX) at 2.6 keV revealed 43.38, 75.39, 70.611, 36.54, 58.57, and 45.94 percent elemental silver in AgNPs formed from the leaf, callus, juice, seed, bark, and peel extract, respectively. Silver nanoparticles synthesized from callus extract were smaller and exhibited the most effective antimicrobial potential, with the highest inhibitory zone of 19 mm against Xanthomonas campestris bacterium and up to 14 mm against Aspergillus niger fungus. Furthermore, the percentage of elemental Ag (measured through EDX) was found to be highest in the nanoparticles synthesized from callus compared to those synthesized from the leaf, seed, peel, fruit juice, and bark of Carica papaya. Hence, the callus extract is the most suitable substrate for the reduction of silver nitrate solution in 1:20 to form the finest silver nanoparticles in an effective biogenic way.

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Green chemistry inspired formation of bioactive stable colloidal nanosilver and its wide-spectrum functionalised properties for sustainable industrial escalation

Cited by 4 publications

References 289 publications

Nanosilver: An Old Antibacterial Agent with Great Promise in the Fight against Antibiotic Resistance

Nanosilver: An Old Antibacterial Agent with Great Promise in the Fight against Antibiotic Resistance

Nanoantioxidant Materials: Nanoengineering Inspired by Nature

Carica papaya Crude Extracts Are an Efficient Source of Environmentally Friendly Biogenic Synthesizers of Silver Nanoparticles

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