A sustainable approach for graphene–oxide surface decoration using Oxalis corniculata leaf extract–derived silver nanoparticles: their antibacterial activities and electrochemical sensing

2020 ◽  
Vol 49 (25) ◽  
pp. 8625-8635
Author(s):  
Varsha Jakhar ◽  
D. K. Sharma
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Leaf Extract ◽  
Antibacterial Activities ◽  
Electrochemical Sensing ◽  
Oxide Surface ◽  
Surface Decoration

Novel OCLE-AgNPΔGO nanocomposites were synthesized using green OCLE-AgNPs and further employed for antibacterial activities and electrochemical sensing applicability.

scholarly journals Green Biosynthesis of Silver Nanoparticles Using Leaf Extract of Carissa carandas L. and Their Antioxidant and Antimicrobial Activity against Human Pathogenic Bacteria

Biomolecules ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 299
Author(s):  
Reetika Singh ◽  
Christophe Hano ◽  
Gopal Nath ◽  
Bechan Sharma
Keyword(s):  
Silver Nanoparticles ◽  
Pathogenic Bacteria ◽  
Leaf Extract ◽  
Room Temperature ◽  
Xrd Analysis ◽  
Antibacterial Activities ◽  
Effect Of Temperature ◽  
Human Pathogenic Bacteria ◽  
Carissa Carandas ◽  
Antioxidant And Antimicrobial Activity

Carissa carandas L. is traditionally used as antibacterial medicine and accumulates many antioxidant phytochemicals. Here, we expand this traditional usage with the green biosynthesis of silver nanoparticles (AgNPs) achieved using a Carissa carandas L. leaf extract as a reducing and capping agent. The green synthesis of AgNPs reaction was carried out using 1mM silver nitrate and leaf extract. The effect of temperature on the synthesis of AgNPs was examined using room temperature (25 °C) and 60 °C. The silver nanoparticles were formed in one hour by stirring at room temperature. In this case, a yellowish brown colour was developed. The successful formation of silver nanoparticles was confirmed by UV–Vis, Fourier transform infrared (FT-IR) and X-ray diffraction (XRD) analysis. The characteristic peaks of the UV-vis spectrum and XRD confirmed the synthesis of AgNPs. The biosynthesised AgNPs showed potential antioxidant activity through DPPH assay. These AgNPs also exhibited potential antibacterial activity against human pathogenic bacteria. The results were compared with the antioxidant and antibacterial activities of the plant extract, and clearly suggest that the green biosynthesized AgNPs can constitute an effective antioxidant and antibacterial agent.

Biological synthesis of silver nanoparticles from leaf extract of Piper betel and its antibacterial activities

2020 ◽  
Author(s):  
Hannah Cynthia Samuel ◽  
Saraswathy Nachimuthu ◽  
Balaji Sadhasivam ◽  
Ramalingam Ponnusamy
Keyword(s):  
Silver Nanoparticles ◽  
Leaf Extract ◽  
Antibacterial Activities ◽  
Biological Synthesis

scholarly journals Correction: Synthesis of DNA-guided silver nanoparticles on a graphene oxide surface: enhancing the antibacterial effect and the wound healing activity

RSC Advances ◽  
2019 ◽  
Vol 9 (67) ◽  
pp. 39434-39434
Author(s):  
Chunyi Tong ◽  
Wei Zou ◽  
Weimin Ning ◽  
Jialong Fan ◽  
Li Li ◽  
...  
Keyword(s):  
Wound Healing ◽  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Antibacterial Effect ◽  
Oxide Surface ◽  
Wound Healing Activity

Correction for ‘Synthesis of DNA-guided silver nanoparticles on a graphene oxide surface: enhancing the antibacterial effect and the wound healing activity’ by Chunyi Tong et al., RSC Adv., 2018, 8, 28238–28248.

Green synthesis of silver nanoparticles–graphene oxide nanocomposite and its application in electrochemical sensing oftryptophan

2013 ◽  
Vol 42 ◽  
pp. 198-206 ◽  
Author(s):  
Junhua Li ◽  
Daizhi Kuang ◽  
Yonglan Feng ◽  
Fuxing Zhang ◽  
Zhifeng Xu ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Green Synthesis ◽  
Electrochemical Sensing

scholarly journals Enhanced antibacterial activity through silver nanoparticles deposited onto carboxylated graphene oxide surface

2021 ◽  
Author(s):  
Arturo Barjola ◽  
María Ángeles Tormo ◽  
Oscar Sahuquillo ◽  
Patricia Bernabé ◽  
José Manuel Pérez ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Graphene Oxide ◽  
Biofilm Formation ◽  
Material Surface ◽  
Oxide Surface ◽  
Main Role ◽  
Carboxylic Groups ◽  
Average Size

Abstract The strong bactericidal action of silver nanoparticles (AgNPs) is usually limited for their degree of aggregation. Deposition of AgNPs onto a graphene oxide (GO) surface to generate GO-Ag hybrids has been shown to be an effective method to control these aggregation problems. In this sense, a novel carboxylated graphene oxide-silver nanoparticle (GOCOOH-Ag) material has been synthesized and their antibacterial and biofilm formation inhibition have been studied.AgNPs decorating the GOCOOH surface achieved an average size of 6.74±0.25 nm, which was smaller than those of AgNPs deposited onto the GO surface. In addition, better distribution of AgNPs was obtained using carboxylated material. It is important to highlight the main role of the carboxylic groups in the nucleation and growth of the AgNPs that decorate the GO-based material surface.In vitro antibacterial activity and antibiofilm-forming action were tested against Gram-positive (Staphylococcus aureus and Staphylococcus epidermidis) and Gram-negative bacteria (Pseudomonas aeruginosa and Escherichia coli). Both GO-Ag and GOCOOH-Ag reduced the bacterial growth, analyzed by time-kill curves. However, the minimum inhibitory concentration and the minimum bactericidal concentration of GOCOOH-Ag were lower than those of GO-Ag for all strains studied, indicating that GOCOOH-Ag has better antibacterial activity. In addition, both nanomaterials prevent biofilm-formation, with a higher reduction of biofilm mass and cell viability in the presence of GOCOOH-Ag. The carboxylation functionalization in GO-based materials can be applied to improve the bactericidal and antibiofilm-forming action of the AgNPs.

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