“…They also speculated that the free radicals are developed from the surface of the silver nanoparticles. Lee et al [37] investigated the antibacterial effect of nanosized silver colloidal solution against S. aureus and K. pneumoniae after padding the solution on textile fabrics.…”
Extract of oven dried leaves of Pongamia pinnata (L) Pierre was used for the synthesis of silver nanoparticles. Stable and crystalline silver nanoparticles were formed by the treatment of aqueous solution of AgNO 3 (1mM) with dried leaf extract of Pongamia pinnata (L) Pierre. UV-visible spectroscopy studies were carried out to quantify the formation of silver nanoparticles. Transmission electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy were used to characterize the silver nanoparticles. TEM image divulges that silver nanoparticles are quite polydispersed, the size ranging from 20 nm to 50 nm with an average of 38 nm. Water soluble heterocyclic compounds such as flavones were mainly responsible for the reduction and stabilization of the nanoparticles. Silver nanoparticles were effective against Escherichia coli (ATCC 8739), Staphylococcus aureus (ATCC 6538p), Pseudomonas aeruginosa (ATCC 9027) and Klebsiella pneumoniae (clinical isolate). The move towards extracellular synthesis using dried biomass appears to be cost effective, eco-friendly to the conventional methods of nanoparticles synthesis.
“…They also speculated that the free radicals are developed from the surface of the silver nanoparticles. Lee et al [37] investigated the antibacterial effect of nanosized silver colloidal solution against S. aureus and K. pneumoniae after padding the solution on textile fabrics.…”
Extract of oven dried leaves of Pongamia pinnata (L) Pierre was used for the synthesis of silver nanoparticles. Stable and crystalline silver nanoparticles were formed by the treatment of aqueous solution of AgNO 3 (1mM) with dried leaf extract of Pongamia pinnata (L) Pierre. UV-visible spectroscopy studies were carried out to quantify the formation of silver nanoparticles. Transmission electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy were used to characterize the silver nanoparticles. TEM image divulges that silver nanoparticles are quite polydispersed, the size ranging from 20 nm to 50 nm with an average of 38 nm. Water soluble heterocyclic compounds such as flavones were mainly responsible for the reduction and stabilization of the nanoparticles. Silver nanoparticles were effective against Escherichia coli (ATCC 8739), Staphylococcus aureus (ATCC 6538p), Pseudomonas aeruginosa (ATCC 9027) and Klebsiella pneumoniae (clinical isolate). The move towards extracellular synthesis using dried biomass appears to be cost effective, eco-friendly to the conventional methods of nanoparticles synthesis.
“…AgNPs are also effective against antibiotic resistant microorganisms and increase the efficiency of antibiotics (Devi and Joshi, 2012;Fayaz et al, 2011;Ruden et al, 2009;Shahverdi et al, 2007). In addition to antimicrobial applications, AgNPs have various other applications such as molecular labelling and detection, diagnostics, antimicrobial coating, optics, wound healing, antitumor and burn lesson protection and treatment (Sondi and Salopek-Sondi, 2004;Ansari et al, 2011;Alt et al, 2004;Lee et al, 2003;Mukherjee et al, 2008;Mohanpuria et al, 2008;Ebrahimi et al, 2016;Ebrahiminezhad et al, 2016c).…”
Silver nanoparticles (AgNPs) retained vast applications in science and technology. Due to the vast application of these particles in various disciplines, there is an interest for synthesis of AgNPs in an environmentally friendly and economic manner. For the first time we were used Mediterranean cypress (Cupressus sempervirens) leaf aqueous extract for biosynthesis of AgNPs. Prepared particles were in various shapes and their diameters were ranging from 10 to 80 nm. TEM micrographs were shown that AgNPs are capped with a biologic matrix. FTIR analysis indicates hydrophilic functional groups in the capping matrix which can improve the stability of AgNPs.
“…To load silver nanoparticles on the surface of fibers, the fibers are usually exposed to a silver nanoparticle sol, resulting in random attachment of nanoparticles on the surface [17][18][19]. The problem in this case is the weak binding of nanoparticles on the surface, so that after a few times washing they are completely removed.…”
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