A sunlight-induced rapid synthesis of silver nanoparticles using sodium salt of N-cholyl amino acids and its antimicrobial applications

Annadhasan, Mari; SankarBabu, V.R.; Naresh, Raghupandiyan; Umamaheswari, K; Rajendiran, Nagappan

doi:10.1016/j.colsurfb.2012.03.009

Cited by 51 publications

(33 citation statements)

References 54 publications

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“…After the obtained PVF 2 /AgNO 3 electrospun nanofibers were left under sunny days, silver nitrate in the nanofibers decomposed to silver, nitrogen dioxide and oxygen,21 and then the composite nanofibers of PVF 2 with silver nanoparticles were obtained (Scheme ). Figure 1 shows the SEM images of pristine PVF 2 and silver‐PVF 2 composite nanofibers.…”

Section: Resultsmentioning

confidence: 99%

Crystal polymorphism and enhanced dielectric performance of composite nanofibers of poly(vinylidene fluoride) with silver nanoparticles

Shi

Duan

et al. 2012

J of Applied Polymer Sci

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Composite nanofibers of poly(vinylidene fluoride) (PVF 2 ) with silver nanoparticles are fabricated by electrospinning. According to the X-ray diffraction patterns and Fourier transform IR (FTIR) spectra, the content of piezoelectric b-polymorph of PVF 2 is enhanced in the composite fibers of PVF 2 and silver as compared with the pristine PVF 2 raw materials and electrospun nanofibers. The differential scanning calorimeter (DSC) measurement indicates that the composite of PVF 2 and silver has higher melting point and crystallization temperature than that of pristine PVF 2 nanofibers. Moreover, the existence of silver nanoparticles greatly enhances the dielectric constant of PVF 2 nanofibers and keeps a low dielectric loss simultaneously, which mainly relates to the internal fibrous structure of the composite.

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Section: Resultsmentioning

confidence: 99%

Crystal polymorphism and enhanced dielectric performance of composite nanofibers of poly(vinylidene fluoride) with silver nanoparticles

Shi

Duan

et al. 2012

J of Applied Polymer Sci

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“…The UV-vis spectra recorded ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 7 the reaction process as a function of time at 100 ºC ( Figure 2B). The AgNO 3 solution was turned to yellow color within 1 h with the addition of pectin solution.…”

Section: Synthesis Of Ag Nps and Their Uv-vis Spectramentioning

confidence: 99%

“…[6] With great efforts made for the synthesis of Ag NPs, several methods such as physical and chemical methods have been reported in the literatures. [7,8] However, most of these synthesis processes are usually costly and involve the use of toxic chemicals such as hydrazine hydrate, [9] sodium borohydride [10] and sodium hydroxide, [11] thus they may cause potential environmental and biological hazards. So, developing simple, green and low-cost methods for the synthesis of Ag NPs becomes very popular.…”

Section: Introductionmentioning

confidence: 99%

Citrus pectin derived silver nanoparticles and their antibacterial activity

Zhang

Zhao

Jiang

et al. 2016

Inorganic and Nano-Metal Chemistry

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Herein, a green, simple and cost-effective synthesis method for silver nanoparticles (Ag NPs) has been established by using citrus pectin as reducing and capping agent. Importantly, no toxic chemicals were added into the synthesis process. The Ag NPs were characterized by UV-vis, TEM, XRD and FTIR. The results indicated the Ag NPs were spherical shape with small, uniform size of 3 nm and excellent dispersity. Additionally, the Ag NPs have good antibacterial activity against Escherichia coli and Staphylococcus aureus. Using citrus pectin for preparation of Ag NPs was potentially a new path for the efficient utilization of citrus resources.

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“…The nano silver formation using actinobacteria 35 , bacteria, fungi 23 and plant 38 extracts under the influence of sunlight is very rapid when compared to the dark condition that required hours to days 24 39 . The photoreduction mechanism of silver ions (Ag + ) using biological extracts suggests that sunlight enables decomposition of photosensitive silver nitrate which leads to production of Ag + and at the same time, promotes the interaction of COO − groups present in the synthesis mixture with the Ag + , leading to the transfer of electrons 23 37 40 which in turn triggers a complete reduction of Ag + , and/or the O-H bond undergoes homolytic cleavage to form the hydrogen radical that eventually transfers its electron to the Ag + , generating nano silver 38 . Additionally, a complete reduction of Ag + into nano silver and release of Ag + from nano silver was verified using cyclic voltammetry (CV) in which the aqueous silver nitrate solution ( Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The FT-IR peaks of protein and lipid molecules and the absorbance band near 260 nm, attributable to aromatic residues as well as disulfide bonds of proteins, suggest that these molecules may be mainly responsible for the nano silver formation, prevention of aggregation and the fluorescence property. Several FT-IR reports 25 37 40 45 have demonstrated the involvement of carbonyl groups in the amino acid residues and peptides of proteins for the nano silver synthesis. These protein molecules form a protein coat on the nano silver surface which prevents the agglomeration and provides stability to the nano silver in the aqueous medium 11 .…”

Section: Resultsmentioning

confidence: 99%

Multi-functional nano silver: A novel disruptive and theranostic agent for pathogenic organisms in real-time

Gopinath

Ranjani

Dhanasekaran

et al. 2016

Sci Rep

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The present study was aimed at evaluating the fluorescence property, sporicidal potency against Bacillus and Clostridium endospores, and surface disinfecting ability of biogenic nano silver. The nano silver was synthesized using an actinobacterial cell-filtrate. The fluorescence property as well as imaging facilitator potency of this nano silver was verified adopting spectrofluorometer along with fluorescent and confocal laser scanning microscope wherein strong emission and bright green fluorescence, respectively, on the entire spore surface was observed. Subsequently, the endospores of B. subtilis, B. cereus, B. amyloliquefaciens, C. perfringens and C. difficile were treated with physical sporicides, chemical sporicides and nano silver, in which the nano silver brought about pronounced inhibition even at a very low concentration. Finally, the environmental surface-sanitizing potency of nano silver was investigated adopting cage co-contamination assay, wherein vital organs of mice exposed to the nano silver-treated cage did not show any signs of pathological lesions, thus signifying the ability of nano silver to completely disinfect the spore or reduce the count required for infection. Taken these observations together, we have shown the multi-functional biological properties of the nano silver, synthesized using an actinobacterial cell-filtrate, which could be of application in advanced diagnostics, biomedical engineering and therapeutics in the near future.

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A sunlight-induced rapid synthesis of silver nanoparticles using sodium salt of N-cholyl amino acids and its antimicrobial applications

Cited by 51 publications

References 54 publications

Crystal polymorphism and enhanced dielectric performance of composite nanofibers of poly(vinylidene fluoride) with silver nanoparticles

Crystal polymorphism and enhanced dielectric performance of composite nanofibers of poly(vinylidene fluoride) with silver nanoparticles

Citrus pectin derived silver nanoparticles and their antibacterial activity

Multi-functional nano silver: A novel disruptive and theranostic agent for pathogenic organisms in real-time

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