Green synthesis of silver nanoparticles using Capsicum annuum L. extract

Abstract

Silver nanoparticles (NPs) were rapidly synthesized by treating silver ions with a Capsicum annuum L. extract. The reaction process was simple and convenient to handle, and was monitored using ultraviolet-visible spectroscopy (UV-vis). The effect of Capsicum annuum L. proteins on the formation of silver NPs was investigated using X-ray photoemission spectroscopy (XPS), electrochemical measurements, Fourier-transform infrared spectroscopy (FTIR) and differential spectrum techniques. The morphology and crystalline phase of the NPs were determined from transmission electron microscopy (TEM), selected area electron diffraction (SAED) and X-ray diffraction (XRD) spectra. The results indicated that the proteins, which have amine groups, played a reducing and controlling role during the formation of silver NPs in the solutions, and that the secondary structure of the proteins changed after reaction with silver ions. The crystalline phase of the NPs changed from polycrystalline to single crystalline and increased in size with increasing reaction time. A recognition-reduction-limited nucleation and growth model was suggested to explain the possible formation mechanism of silver NPs in Capsicum annuum L. extract.

Application of Biosynthesized Silver Nanoparticles Against a Cancer Promoter Cyanobacterium, Microcystis aeruginosa

“…The results suggested that the capping ligand of the silver NPs may be an aromatic compound. It was reported that the extract of unicellular green algae C. vulgaris was used to synthesize single-crystalline silver nanoplates at room temperature (Xie et al, 2007). Proteins in the extract provide dual function of Ag+ reduction and shape-control in the synthesis of the silver NPs.…”

“…It was reported that extracts from microbes act both as reducing and capping agents in metal synthesis of nanoparticles. Reduction of metal ions by combinations of biomolecules such as enzymes or proteins, amino acids, polysaccharides, and vitamins (Collera-Zuniga et al, 2005) which may be used as reductants to react with silver ions, leading to silver NPs synthesis in solutions (Li et al, 2007) is environmentally benign, yet chemically complex. The overall suggestions are that proteins and polysaccharides were involved in the reduction of AgNO 3 to form silver NPs and the capping agents may be the aromatic compounds.…”

“…Among all metallic nanoparticles, silver NPs have proved to be the most effective against large variety of organisms including cyanobacteria (Gong et al, 2007). The biological system for biosynthesis of silver NPs must be consisting of environmentally acceptable solvent system, eco-friendly reducing and capping agents (Vigneshwaran et al, 2007;Xie et al, 2007), high-yield, low cost, non-toxic and environmentally benign procedures (Thakkar et al, 2010).…”

Green Synthesized Silver Nanoparticles Prepared from the Antimicrobial Crude Extracts of two Brown Seaweeds Against Plant Pathogens

“…6). FTIR spectra data is commonly used for identifying biomolecule responsible for the reduction of Ag + ions and the capping of the bioreduced Ag-NPs (Li et al, 2007;Song et al, 2009;Travan et al, 2009;Vanmathiselvi and Sivakumar, 2012). FTIR spectral peaks of Ag-NPs were strong and of crude were weak in Hedophyllum sessile (Fig.…”

Flower-shaped gold nanoparticles synthesized using Kedrostis foetidissima and their antiproliferative activity against bone cancer cell lines

“…Nanochemistry mainly focuses on the synthesis of various metal nanoparticles like gold, silver, zinc, platinum [2][3][4][5], etc., due to its unique properties, which opens a new venue for the production of nanodevices, therapeutics, drugs, etc., in the field of nanomedicine and nanobiotechnology [6][7][8][9][10][11][12]. Gold nanoparticles have diverse applications in cancer treatment, electrochemical sensors, biosensors, gene and drug delivery, catalysis, etc., [13,14].…”