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Syntheses of Silver Nanoparticles and Their Property

Moreover, by using PVP as a dispersant, pure, uniform, and stable colloidal silver nanoparticles covered with polymer PVP can be obtained easily in very small size, because the dispersant prevents aggregation of the silver nanoparticles.

The compatibility of the bark and powder extracts of Cinnamon zeylanicum toward the formation of silver nanoparticles results that bark extract could produce a higher amount of silver nanoparticles compared to the powder extract. The resulting nanoparticles varied in shape and size but had strong antibacterial activity against the Escherichia coli. [60]. Savithramma N [59] Used bark extracts of Boswellia ovalifoliolata and Shorea tumbuggaia to synthesise silver nanoparticle.

Over the past few decades, many synthetic methods of silver nanoparticles have been studied.

Preparation of plant broth and biosynthesis of silver nanoparticles

On treating aqueous silver sulfate and chloroauric acid solutions with Emblica Officinalis fruit extract, rapid reduction of the silver and chloroaurate ions is observed leading to the formation of highly stable silver and gold nanoparticles in solution. Transmission Electron Microscopy analysis of the silver and gold nanoparticles indicated that they ranged in size from 10 to 20 nm and 15 to 25 nm respectively [38]. The fruit extract of papaya works as reducing as well as capping agent. Nanoparticles on characterization analysis showed the average particle size of 15 nm as well as revealed their cubic structure. C-O group of polyols such as hydroxyl flavones and catechins present in green unripe Papaya (Carica papaya) fruit are mainly responsible for the reduction of Ag ions, whereby they themselves get oxidized to unsaturated carbonyl groups [12].

Gole A [55] reported that the reduction of silver ions occurred when silver nitrate solution was treated with aqueous extract of Cocus nucifera coir at 60°C, particle synthesised with range of the size as 23± 2 nm and face centred cubic silver nanoparticles obtained.

Ammar, "Synthesis and applications of silver nanoparticles",

Synthesis of silver nanoparticles was carried out by adding 10ml of leaf extract to 100ml of 1mM silver nitrate (AgNO3) solution with continuous stirring at room temperature. Reduction of Ag+ to Ag0 was confirmed by the colour change of solution from colourless to brown. Its formation was further confirmed by using UV-Visible spectroscopy.

The synthesis of silver nanoparticles using a broth prepared from the aromatic spath of male inflorescence of screw pine Pandanus odorifer (Forssk) [64]. Flower extract of Hibiscus sabdariffa extracellular synthesized silver nanoparticle of 25 nm [65].

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Synthesis of Silver Nanoparticles in Photosynthetic Plants


Synthesis of Silver Nanoparticles - YouTube

The protocol for the nanoparticle syntheses involves: the collection of the part of plant of interest from the available sites then it’s washing thoroughly with tap water to remove contamination followed by surface sterilization with double distilled water and air dried at room temperature. These clean and fresh sources are then powdered using domestic blender or cut it into very small pieces. And for the plant broth preparation, around 10-25g of the dried powder or finally chopped leaves were kept in a beaker and boiled with 100mL of deionised distilled water. The extract was filtered with Whatman filter paper No.1 further the filtrate was used as reducing source for the synthesis of silver nanoparticles.

Synthesis of silver nanoparticles using plants extract …

In particular, we mainly present several chemical approaches to preparing silver nanoparticles and their properties as well as applications based on our recent studies.

Antimicrobial activity of silver nanoparticles ..

As metal nanoparticles seems to fascinate for the future diverse industry due to their enriched chemical, electrical and physical properties. The development of immaculate protocols for the synthesis of highly monodisperse nanoparticles of various sizes, geometries and chemical composition is one of the most challenging obstructions in the field of nanotechnology. The use of toxic chemicals and non-polar solvents in synthesis leads to the inability to use nanoparticles in clinical fields. Therefore, development of clean, non-toxic, biocompatible and eco-friendly method for synthesis of nanoparticles deserves recognition. So there is need of eco friendly nanoparticles synthesis approach.

activity of Silver Nanoparticles ..

A large number of plants are reported to facilitate silver nanoparticles syntheses are mentioned in Table 1 and are discussed briefly in the presented review.

Green synthesis of silver nanoparticles in aloe ..

Massive numbers of plant species are available in nature, and many of them have huge potential for the production of nanomaterials. For the syntheses of nanoparticles employing plants can be advantageous over other biological entities which can overcome the time consuming process of employing microbes and maintaining their culture which can lose their potential towards synthesis of nanoparticles. And the advantages of using plants for the synthesis of nanoparticles are that the plants are easily available and safe to handle and possess a large variety of active agents that can promote the reduction of silver ions. Most of the plant parts like leaves, roots, latex, bark, stem, and seeds are being used for nanoparticle synthesis. Green synthesis silver nanoparticles using plant extracts provides benefits over chemical and physical method as it is economical, energy efficient, cost effective; provide healthier work places and communities, protecting human health and environment leading to lesser waste and safer products. This eco-friendly method can potentially be used in various areas, including pharmaceuticals, cosmetics, foods, and medical applications. Hence in this regard; use of plant extract for synthesis can form an immense impact in coming decades.

Green synthesis of silver nanoparticles in aloe vera plant ..

Hence, a review is compiled describing the green syntheses of silver nanoparticles that provide advancement over conventional methods as it is cost effective and lesser or almost zero contaminations for the environment.

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