Green synthesis and characterization of Carica papaya leaf extract coated silver nanoparticles through X-ray diffraction, electron microscopy and evaluation of bactericidal properties

Banala, Rajkiran Reddy; Nagati, Veera Babu; Karnati, Pratap Reddy

doi:10.1016/j.sjbs.2015.01.007

Cited by 156 publications

(96 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The data analysis showed sizes of silver nanoparticles in the range of 3-41 nm and 3-27 nm spherical shaped for SL-AgNPs and MA-AgNPs, respectively which may confer the ability to penetrate the cells/microbes and execute their bactericidal properties. Similar size ranges of AgNPs have been reported [32,33,44].…”

Section: Resultssupporting

confidence: 85%

Characterization and Biological Activities of Silver Nanoparticles Synthesized from Stems of Sarcocephalus latifolius (Sm) E.A. Bruce and Massularia acuminata (G. Don) Bullock ex Hoyl. (Rubiaceae)

Ajayi¹,

Odeyemi²,

Otunola³

et al. 2017

Asian J. Chem.

View full text Add to dashboard Cite

Silver nanoparticles (AgNPs) have been synthesized from the stems of Sarcocephalus latifolius (SL) and Massularia acuminata (MA) and characterized for their sizes and shapes using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Complete formations of the AgNPs were observed with colour change from colourless to brownish-black. Fourier transform infrared spectroscopy (FT-IR) and energy dispersive X-ray spectroscopy (EDS/EDX) were conducted to detrmine the various functional groups and the concentration of metal ions of the molecules. The data analysis showed sizes of 3-41 nm and 3-37 nm, spherical shaped nanoparticles for Sarcocephalus latifolius and Massularia acuminata, respectively as revealed by TEM, complementing the results for SEM. FT-IR identifies ethylene groups as the reducing and capping agents for the formation of the nanoparticles. The X-ray diffraction pattern confirmed the presence of silver crystallites and as well as their sizes, confirming the TEM results. Silver nanoparticles exhibited not too good potentials as free radical scavengers when compared to the standard drugs. The synthesized AgNPs in suspension showed activity against Gram-positive and Gram-negative bacteria with minimum inhibitory concentrations (MICs) to be in the range from 62.5 to 250 µg/mL. In summary, the synthesized AgNPs showed acceptable sizes and shapes of nanoparticles.

show abstract

Section: Resultssupporting

confidence: 85%

Characterization and Biological Activities of Silver Nanoparticles Synthesized from Stems of Sarcocephalus latifolius (Sm) E.A. Bruce and Massularia acuminata (G. Don) Bullock ex Hoyl. (Rubiaceae)

Ajayi¹,

Odeyemi²,

Otunola³

et al. 2017

Asian J. Chem.

View full text Add to dashboard Cite

show abstract

“…The formation of AgNPs after reduction of Ag + which was confirmed by the color changes with addition of leaf extracts of Ocimum sanctum L. to AgNO 3 solution. The synthesis and aggregation of AgNPs through the fall of time was supported the progress of latest absorbance bands at 444 nm [45]. It showed that the transfer of charges may be happened among the medium and the particles present in the solution.…”

Section: Discussionmentioning

confidence: 74%

Biosynthesis and Characterization of Silver Nanoparticles (Snps) by using Leaf Extracts of Ocimum Sanctum L (Tulsi) and Study of its Antibacterial Activities

Bindhani¹,

Panigrahi²

2015

J Nanomedic Nanotechnol

View full text Add to dashboard Cite

The present study aimed to synthesis of SNPs (Silver Nanoparticles) or (Green-Silver) in aqueous medium using leaf extracts of Ocimum sanctum L. The synthesized silver nanoparticles (SNPs) were characterized by the different techniques such as UV-vis Spectrophotometer, XRD, FTIR and TEM. The synthesis of silver nanoparticles were confirmed due to the SPR optical absorption band peak at ~440 nm by UV-vis spectrophotometer, nearly 15-45 nm in diameter with spherical in shape by TEM, high crystalline with the Bragg peaks of (111), (200), (220) and (311) plane as the predominant orientation by XRD and FTIR confirmed the presence of methoxy and allyl groups in SNPs. The reduction of Ag metal ions was performed due to the presence of various types of anti-oxidants in the leaves of Ocimum sanctum L. and each having a unique structure and functions. The formations of silver nanoparticles through aqueous medium were fairly stable and which can be incubated up to 4 months in refrigerator. At last, the antimicrobial activities of AgNPs were evaluated using different bacteria strain. It was found that, this biosynthesizing of silver nanoparticles may inhibit the all types of bacterial pathogenic organisms competently. This recent research study opens an innovative design to progress our understanding of how SNPs behave can be optimized to improve human antimicrobial activities.Citation: Bindhani BK, Panigrahi AK (2015) Biosynthesis and Characterization of Silver Nanoparticles (SNPs) by using Leaf Extracts of Ocimum Sanctum L (Tulsi) and Study of its Antibacterial Activities.

show abstract

“…20 mL of freshly prepared 0.1 M AgNO3 solution was added (drop-wise) to the flask. The flask was incubated in dark for 24 hrs at room temperature [15]. …”

Section: Methodsmentioning

confidence: 99%

Antioxidant and Antibacterial Potential of Silver Nanoparticles: Biogenic Synthesis Utilizing Apple Extract

Nagaich

Gulati

Chauhan

2016

Journal of Pharmaceutics

View full text Add to dashboard Cite

The advancement of the biological production of nanoparticles using herbal extracts performs a significant role in nanotechnology discipline as it is green and does not engage harsh chemicals. The objective of the present investigation was to extract flavonoids in the mode of apple extract and synthesize its silver nanoparticles and ultimately nanoparticles loading into hydrogels. The presence of flavonoids in apple extract was characterized by preliminary testing like dil. ammonia test and confirmatory test by magnesium ribbon test. The synthesized silver nanoparticles were characterized using UV spectroscopy, particle size and surface morphology, and zeta potential. Silver nanoparticles loaded hydrogels were evaluated for physical appearance, pH, viscosity, spreadability, porosity, in vitro release, ex vivo permeation, and antibacterial (E. coli and S. aureus) and antioxidant studies (DPPH radical scavenging assay). Well dispersed silver nanoparticles below were observed in scanning electron microscope image. Hydrogels displayed in vitro release of 98.01% ± 0.37% up to 24 h and ex vivo permeation of 98.81 ± 0.24% up to 24 h. Hydrogel effectively inhibited the growth of both microorganism indicating good antibacterial properties. The value of percent radical inhibition was 75.16% ± 0.04 revealing its high antioxidant properties. As an outcome, it can be concluded that antioxidant and antiageing traits of flavonoids in apple extract plus biocidal feature of silver nanoparticles can be synergistically and successfully utilized in the form of hydrogel.

show abstract

Green synthesis and characterization of Carica papaya leaf extract coated silver nanoparticles through X-ray diffraction, electron microscopy and evaluation of bactericidal properties

Cited by 156 publications

References 14 publications

Characterization and Biological Activities of Silver Nanoparticles Synthesized from Stems of Sarcocephalus latifolius (Sm) E.A. Bruce and Massularia acuminata (G. Don) Bullock ex Hoyl. (Rubiaceae)

Characterization and Biological Activities of Silver Nanoparticles Synthesized from Stems of Sarcocephalus latifolius (Sm) E.A. Bruce and Massularia acuminata (G. Don) Bullock ex Hoyl. (Rubiaceae)

Biosynthesis and Characterization of Silver Nanoparticles (Snps) by using Leaf Extracts of Ocimum Sanctum L (Tulsi) and Study of its Antibacterial Activities

Antioxidant and Antibacterial Potential of Silver Nanoparticles: Biogenic Synthesis Utilizing Apple Extract

Contact Info

Product

Resources

About