A Review on the Green Synthesis of Silver Nanoparticles and Their Morphologies Studied via TEM (original) (raw)
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Silver Nanoparticles - A Review with Focus on Green Synthesis
International Journal of Pharma Research & Review, 2016
The present review focuses on the green synthesis of silver nanoparticles by using an endophytic fungus, the properties of silver nanoparticles and the general techniques by which nanoparticles can well characterized. Silver has been used since ancient time due to its potent antimicrobial effect and now it is recognized as a non toxic and safe for human beings. Silver nanoparticles have attracted keen interest due to its specific size ranges 1-100 nm and its unique physical, chemical and biological properties. There are several methods reported for the synthesis of silver nanoparticles including physical, chemical and biological methods in which biological method are cheap, reliable, safe and non toxic over physical and chemical methods. Furthermore green synthesis technique is a promising approach for synthesis of silver nanoparticles showing antimicrobial effect as its not uses any toxic chemicals and specific higher temperature and pressure. But use of endophytic Fungi provides s...
Nanoparticle biosynthetic discipline is still under development and is known to have a big impact on numerous manufactures for a long time. Nowadays, biosynthesis of silver nanoparticles (AgNPs) had gained so much attention in developed countries due to development demand of environmental friendly technology for material synthesis. The use of green chemistry is environmental friendly, non-toxic, and cheap. This review focused on the recent scientific publications in the green synthesis field of AgNPs and its applications. A number of microorganisms including bacteria, fungi, yeasts, algae, and plants either intra-or extracellular have been found to be capable of synthesizing AgNPs. All scientific reports reflect the unique properties AgNPs possess that find myriad applications such as antibacterial, antifungal, antivirus, and anticancer drugs, larvicidal excellent catalytic natural action towards degradation of dyes, very good antioxidants, treatment of diabetes-related complications, and wound healing activities. The recent strategy for improving the efficacy of antibiotics is to combine them with AgNPs in order to control the microbial infections as confirmed by the damage action of AgNPs on microbial deoxyribonucleic acid. This review describes also the microorganism/plant extract and the reaction parameters used in synthesis of the AgNPs, which hold prominent impact on their size, shape, and application. Recently published information on AgNP synthesis and its applications are summarized in this review.
Silver nanoparticles green synthesis: A mini review
Nanotechnology is a significant field of contemporary research dealing with design, synthesis, and manipulation of particle structures ranging from in the region of 1-100 nm. Nanoparticles (NPs) have broad choice of applications in areas such as fitness care, cosmetics, foodstuff and feed, environmental health, mechanics, optics, biomedical sciences, chemical industries, electronics, space industries, drug-gene delivery, energy science, optoelectronics, catalysis, single electron transistors, light emitters, nonlinear optical devices, and photoelectrochemical applications. Nano Biotechnology is a speedily mounting scientific field of producing and constructing devices, an important area of research in nano biotechnology is the synthesis of NPs with different chemical compositions, sizes and morphologies, and controlled dispersities. Silver nanoparticles (NPs) have been the subjects of researchers because of their unique properties (e.g., size and shape depending optical, antimicrobial, and electrical properties). A variety of preparation techniques have been reported for the synthesis of silver NPs; notable examples include, laser ablation, gamma irradiation, electron irradiation, chemical reduction, photochemical methods, microwave processing, and biological synthetic methods. This assessment presents a general idea of silver nanoparticle preparation. The aim of this analysis article is, therefore, to replicate on the existing state and potential prediction, especially the potentials and limitations of the above mentioned techniques for industries.
ChemInform Abstract: Innovative Eco-Friendly Approaches for Green Synthesis of Silver Nanoparticles
ChemInform, 2015
Nanotechnology is an escalating field that has made its contribution to all spheres of human life. The green synthesis of nanoparticles has paved for better methodologies and approaches in the medicinal field. Nowadays silver, gold and other metallic nanoparticles are used as an efficient carrier for drug molecules for developing novel drug delivery systems. In course of synthesizing these nanoparticles various chemicals, solvents and reagents are used which harms our eco system directly or indirectly. Silver nanoparticles (Ag NPs) have been widely used as a novel therapeutic agent extending its use as antibacterial, antifungal, anti-viral and anti-inflammatory agent. Silver nanoparticles (Ag NPs) prepared by green synthesis have many advantages over conventional methods involving chemical agents associated with environmental toxicity. Green synthetic methods include polysaccharide method, irradiation method, biological method, polyoxometallates method and tollens method. Green synthesis of nanoparticles is found to be an emerging branch of nanotechnology. The use of environmentally benign materials like plant leaf extract for the synthesis of nanoparticles offers numerous benefits of eco-friendliness and compatibility for pharmaceutical and biomedical applications as they do not use toxic chemicals in the synthesis protocols. Rapid and green synthetic methods using various plant extracts have shown a great potential in silver nanoparticles (Ag NPs) synthesis. This review article describes the bio-inspired synthesis of nanoparticles that provides advancement over chemical and physical methods as it is cost effective, eco-friendly and more effective in a variety of applications.
Green Synthesis of Silver Nanoparticles: A Review
Green and Sustainable Chemistry, 2016
The bio-molecules from various plant components and microbial species have been used as potential agents for the synthesis of silver nanoparticles (AgNPs). In spite of a wide range of bio-molecules assisting in the process, synthesizing stable and widely applicable AgNPs by many researchers still poses a considerable challenge to the researchers. The biological agents for synthesizing AgNPs cover compounds produced naturally in microbes and plants. More than 100 different biological sources for synthesizing AgNPs are reported in the past decade by various authors. Reaction parameters under which the AgNPs were being synthesized hold prominent impact on their size, shape and application. Available published information on AgNPs synthesis, effects of various parameters, characterization techniques, properties and their application are summarised and critically discussed in this review.
Sustainable Nanotechnology- Green Synthesis Methods for Silver Nanoparticles
International Journal of Scientific Research in Science and Technology, 2023
Silver has a long history of being an excellent substance in its field of medicine Because of their special qualities, they have been used for a wide range of products, including antibacterial agents, household, industrial, and healthcare-related items, coatings for medical devices, drug delivery, and eventually to increase the tumor-killing effects of anticancer drugs. By the help of nanotechnology pure silver nanoparticles is obtained. The bioreduction of metal ions into their elemental form in the size range of 1–100 nanometers (nm) is known as "green synthesis," and it requires the use of plants or plant parts. As a result, the biological activities are increased and the toxicity level is decreased when AgNPs are synthesised using a green method. Scientists and researchers from various fields are becoming more and more interested in synthesising nanoparticles, particularly silver nanoparticles. However, they are unsure of the proper procedures to follow and the safety precautions to take when synthesising AgNPs, which is why the main goal of this paper is to provide a detailed methodology for the environmentally friendly synthesis of silver nanoparticles.
Green nanotechnology: a review on green synthesis of silver nanoparticles — an ecofriendly approach
International Journal of Nanomedicine
Background: Nanotechnology explores a variety of promising approaches in the area of material sciences on a molecular level, and silver nanoparticles (AgNPs) are of leading interest in the present scenario. This review is a comprehensive contribution in the field of green synthesis, characterization, and biological activities of AgNPs using different biological sources. Methods: Biosynthesis of AgNPs can be accomplished by physical, chemical, and green synthesis; however, synthesis via biological precursors has shown remarkable outcomes. In available reported data, these entities are used as reducing agents where the synthesized NPs are characterized by ultraviolet-visible and Fourier-transform infrared spectra and X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Results: Modulation of metals to a nanoscale drastically changes their chemical, physical, and optical properties, and is exploited further via antibacterial, antifungal, anticancer, antioxidant, and cardioprotective activities. Results showed excellent growth inhibition of the microorganism. Conclusion: Novel outcomes of green synthesis in the field of nanotechnology are appreciable where the synthesis and design of NPs have proven potential outcomes in diverse fields. The study of green synthesis can be extended to conduct the in silco and in vitro research to confirm these findings.
IP Innovative Publication Pvt. Ltd, 2020
Silver nanoparticles (AgNP) have been already proposed for many advanced research approaches in the fields of therapeutics and nanomedicine due to their non-antigenicity and more potent optical characteristics along with their respective antioxidant and antimicrobial properties in effective site specific targeted drug-delivery practices systems. In last few years, chemically synthesized metal based nanoparticles has been studies for their biological and delivery behaviours because of use of various chemical and bio-hazardous chemicals in their preparations. Various previous studies on green synthesis of silver metal based nanoparticles have been designed which involved biological sources like microorganisms, plants and herbal extracts as cost effective, eco-friendly and non-toxic approaches. So that, green synthesis of silver nanoparticles has been much exploited in wider range of applications in the field of biomedical, therapeutics, nanomedicine and pharmaceuticals as more potent and safe drug delivery vehicles as compared to chemically preparations of silver nanoparticles. Therefore, in this review, we recollected the comparative studies based on advantages of green approaches of silver nanoparticles over their respective chemical preparations.
Biotemplates in the green synthesis of silver nanoparticles
Biotechnology Journal, 2010
This article recapitulates the scientific advancement towards the greener synthesis of silver nanoparticles. Applications of noble metals have increased throughout human civilization, and the uses for nano-sized particles are even more remarkable. "Green" nanoparticle synthesis has been achieved using environmentally acceptable solvent systems and eco-friendly reducing and capping agents. Numerous microorganisms and plant extracts have been applied to synthesize inorganic nanostructures either intracellularly or extracellularly. The use of nanoparticles derived from noble metals has spread to many areas including jewelery, medical fields, electronics, water treatment and sport utilities, thus improving the longevity and comfort in human life. The application of nanoparticles as delivery vehicles for bactericidal agents represents a new paradigm in the design of antibacterial therapeutics. Orientation, size and physical properties of nanoparticles influences the performance and reproducibility of a potential device, thus making the synthesis and assembly of shape-and size-controlled nanocrystals an essential component for any practical application. This need has motivated researchers to explore different synthesis protocols.
A Facile and Green Synthesis Route for the Production of Silver Nanoparticles in Large Scale
International Journal of NanoScience and Nanotechnology, 2018
In the present work, a fast, green and simple synthesis method for the production of silver nanoparticles (AgNPs) is introduced. Silver nanoparticles are currently among the most widely used man-made nano materials, present in a wide range of consumer products. Green chemistry is characterized by careful planning of chemical synthesis of silver nanoparticles to reduce adverse outcomes. Synthesis of AgNPs was carried out at 100 ◦C temperature using glucose as reducing agent and starch as capping agent. Prepared AgNPs were characterized using transmission electron microscopy, UV-Vis spectrophotometry, Dynamic Light Scattering (DLS) and X-ray Diffraction (XRD) patterns. It was found that the synthesized AgNPs have an average diameter size of 50 nm. Further experiments showed that silver nanoparticles have good antibacterial properties and their production process is capable to scaling up. Due to the using of natural and low-cost materials, the production process is also environmental a...