Silver nanoparticles green synthesis

Sharma, V.K., Yngard, R.A., and Lin, Y. 2009. Silver nanoparticles Green synthesis and their antimicrobial activities. Arfv. Colloid Interface Sci. 145 83-96. 

Philip, D. (2010) Green synthesis of gold and silver nanoparticles using Hibiscus rosa sinensis. Physica E, 42, 1417-1424. 

Nadagouda, M.N. and Varma, R.S. (2008) Green synthesis of silver and palladium nanoparticles at room temperature using coffee and tea extract. Green Chemistry, 10, 859-862. 

Vigneshwaran, N., Nachane, R. R, Balasubramanya, R. H., Varadarajan, P. V. (2006). A novel one-pot green synthesis of stable silver nanoparticles using soluble starch. Carbohydr. Res. 341(12), 2012-2018. 

Most of the recent literature in this field is concerned with synthetic organic reactions, supramolecular chemistry and crystal engineering. However, solvent free approaches can also be used in the extraction of natural products, although less information is available in the mainstream literature. Juice extractors can be used to afford aqueous solutions of biologically active compounds from undried plant material. An extract of Capsicum annum L. was recently prepared in this way, and then used in the green synthesis of silver nanoparticles. The actual synthesis of the nanoparticles was conducted in the aqueous phase and therefore this work will not be discussed further here. However, this solvent free approach to extraction is probably worthy of greater representation in the green chemistry literature. 

N. Vigneshwaran, R. P. Nachane, R. H. Balasubramanya, P. V. Varadarajan A Novel One-Pot Green Synthesis of Stable Silver Nanoparticles Using Soluble Starch, ""Carbohydrate Research 2006, v. 341,2012-2018. 

H. Huang, X. Yang Synthesis of Polysaccharide-stabilized Gold and Silver Nanoparticles A Green Method, ""Carbohydrate Research 2004, v. 339, iss. 15,2627-2631. 

This review approaches the preparation of gold and silver nanoparticles by employing green synthesis techniques instead of chemical and physical methods. This smdy will provide valuable information for the preparation and characterization of silver and gold nanoparticles and its present and future prospects and prospective constraints of techniques in industry. In addition, we have particularly emphasized the role of silver and gold nanoparticles with other materials and their biomedical applications. 

Advantages of plant-mediated green synthesis of gold and silver nanoparticles. 

MECHANISM OF GREEN SYNTHESIS OF GOLD AND SILVER NANOPARTICLES... 

The mechanism of green synthesis of gold and silver nanoparticles is due to the presence of polyphenol in plant extracts which is responsible for reduction of nanoparticles. The molecular mechanism which gives the antioxidant properties of gold and silver nanoparticles endorses reduction of Au ions to Au atoms and Ag ions to Ag atoms (Figure 6.8). This reduction takes place by abstraction of hydrogen because of the OH groups in the polyphenol... 

TEM analysis confirms the approximate shape, nanogram, and diameter (< 100 nm) after the bioreduction of green synthesis of gold and silver nanoparticles after 24 h. The shapes of some nanoparticles were roughly circular with smooth edges and... 

Jha, A.K., Prasad, K., 2010. Green synthesis of silver nanoparticles using Cycas Leaf. Int. J. Green Nanotechnol. 1, 110—117. 

Otari, S.V., Patil, R.M., Nadaf, N.H., Ghosh, SJ., Pawar, S.H., 2014. Green synthesis of silver nanoparticles hy microorganism using organic pollutant its antimicrobial and catalytic apphcation. Environ. Sci. Pollut. Res. Int. 21 (2), 1503—1513. 

Philip, D., Unni, C., Aromal, S.A., Vidhu, V.K., 2011. Murraya koenigii leaf-assisted rapid green synthesis of silver and gold nanoparticles. Spectrochim. Acta A Mol. Biomol. Spectrosc. 78 (2), 899—904. 

Zain, N.M., Stapley, A.G.E., Shama, G., 2014. Green synthesis of silver and copper nanoparticles using ascorbic acid and chitosan for antimicrobial applications. Carbohydr. Polym. 112, 195-1202. 

Okafor, R, Janen, A., Kukhtareva, T., Edwards, V., Curley, M., 2013. Green synthesis of silver nanoparticles, their characterization, application and antibacterial activity. Int. J. Environ. Res. Public Health 10, 5221—5238. 

Gupta, K., Hazarika, S.N., Saikia, D., Namsa, D.N., Manabendra, M., 2014. One step green synthesis and anti-microbial and anti-biofilm properties of Psidium guajava L. leaf extract-mediated silver nanoparticles. Mater. Lett. 125, 61—IQ. 

Khanna, K.P., Nair, C.K.K., 2009. Synthesis of silver nanoparticles using cod liver oil (fish oil) green approach to nanotechnology. Int. J. Green Nanotechnol. Available from http //dx.doi.Org/10.1080/19430870902909759. 

Kumar, D.A., Palanichamy, V., Roopan, S.M., 2014. Green synthesis of silver nanoparticles using Altemanthera dentata leaf extract at room temperature and their antimicrobial activity. Spectrochim. Acta A 127, 168—171. 

H. Bar, D. Kr. Bhui, G. P. Sahoo, P. Sarkar, S. Pyne and A. Misra, Green synthesis of silver nanoparticles using latex of Jatropha curcas. Colloids and Surfaces A Physicochem. Eng. Aspects, 2009, 339, 134-139. 

Singh M., Sinha L, Mandal R.K. Role of pH in the green synthesis of silver nanoparticles. Mater. Lett. 2009a 63 425 27. 

Chemical reduction is the most frequently applied method for the preparation of silver nanoparticles as stable, colloidal dispersions in water or organic solvents. However, a number of alternative green chemistry synthesis routes have been reported. Inspired by mussel adhesive proteins, a novel functional polyurethane based on hydrolyzable tannins that contain a number of catechol groups was... 

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