UV – Radiation induced nucleation and growth of colloidal silver nanoparticles: Characterization and their antibacterial properties

2020 ◽  
Author(s):  
C. S. Shivananda ◽  
B. Lakshmeesha Rao B ◽  
K. Nagi Reddy ◽  
Y. Sangappa
Keyword(s):  
Silver Nanoparticles ◽  
Uv Radiation ◽  
Antibacterial Properties ◽  
Nucleation And Growth ◽  
Colloidal Silver ◽  
Colloidal Silver Nanoparticles ◽  
Radiation Induced ◽  
Nanoparticles Characterization

scholarly journals Radiolytic Synthesis of Colloidal Silver Nanoparticles for Antibacterial Wound Dressings

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Pimpon Uttayarat ◽  
Jarurattana Eamsiri ◽  
Theeranan Tangthong ◽  
Phiriyatorn Suwanmala
Keyword(s):  
Silver Nanoparticles ◽  
Gamma Radiation ◽  
Metallic Nanoparticles ◽  
Antibacterial Properties ◽  
Wound Dressings ◽  
Poly Vinyl Alcohol ◽  
Metallic Silver ◽  
Colloidal Silver ◽  
Colloidal Silver Nanoparticles ◽  
Radiolytic Synthesis

Radiolytic synthesis provides a convenient and environmentally-friendly approach to prepare metallic nanoparticles in large scale with narrow size distribution. In this report, colloidal silver nanoparticles (AgNPs) were synthesized by gamma radiation using poly(vinyl alcohol) (PVA) or silk fibroin (SF) as stabilizers and were evaluated for their antibacterial properties. The conversion of metallic silver ions to silver atoms depended on irradiation dose and stabilizer concentration as determined by UV-Vis spectrophotometry and transmission electron microscopy. The uniformly dispersed AgNPs with diameter 32.3 ± 4.40 nm were evaluated as antiseptic agents in films composed of chitosan, SF, and PVA that were processed by irradiation-induced crosslinking. Using disc diffusion assay, the films containing 432 ppm AgNPs could effectively inhibit the growth of bothStaphylococcus aureusandPseudomonas aeruginosa. Therefore, we have demonstrated in our present study that gamma radiation technique can potentially be applied in the mass production of antibacterial wound dressings.

scholarly journals Synthesis of Colloidal Silver Nanoparticles in Various Liquid Media Using Pulse Laser Ablation Method and Its Antibacterial Properties

2021 ◽  
Vol 21 (3) ◽  
pp. 761
Author(s):  
Syifa Avicenna ◽  
Iis Nurhasanah ◽  
Ali Khumaeni
Keyword(s):  
Silver Nanoparticles ◽  
Laser Ablation ◽  
Pulse Laser ◽  
Antibacterial Agent ◽  
Pulse Laser Ablation ◽  
Synthesis Method ◽  
Antibacterial Properties ◽  
Consumer Products ◽  
Colloidal Silver ◽  
Colloidal Silver Nanoparticles

The silver nanoparticles (AgNPs) have been applied as an antibacterial agent in consumer products, cosmetics, and food industries. In this present work, AgNPs were synthesized in various mediums of polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), and chitosan using the pulse laser ablation synthesis method. Experimentally, a pulse Nd:YAG laser beam (1064 nm, 7 ns, 30 mJ) was directed using a silver mirror and focused using a quartz lens with a focal length of 30 mm on a silver metal plate placed in a petri dish containing liquid mediums for 120 min to produce colloidal silver nanoparticles. The results certified that All AgNPs have a spherical shape with polydisperse size in all media, including PVP, PEG, and chitosan. The smallest AgNPs have been produced in PVP medium with an averaged smallest size of 11.62 nm. Based on this result, PVP is the preferred medium to produce AgNPs with the smallest size and good stability. The produced silver nanoparticles have been successfully employed as an antibacterial agent, which is experimentally demonstrated by using Escherichia coli and Staphylococcus aureus. The result certified that the produced silver nanoparticles could effectively kill the bacteria with a killing percentage of 99.6 to 100%.

Microplasma-Assisted Growth of Colloidal Silver Nanoparticles for Enhanced Antibacterial Activity

2013 ◽  
Vol 11 (1) ◽  
pp. 44-51 ◽  
Author(s):  
Ruixue Wang ◽  
Shasha Zuo ◽  
Weidong Zhu ◽  
Shan Wu ◽  
Weifeng Nian ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Colloidal Silver ◽  
Colloidal Silver Nanoparticles

scholarly journals Influence of dose on particle size of colloidal silver nanoparticles synthesized by gamma radiation

2010 ◽  
Vol 79 (12) ◽  
pp. 1203-1208 ◽  
Author(s):  
Kazem Naghavi ◽  
Elias Saion ◽  
Khadijeh Rezaee ◽  
Wan Mahmood Mat Yunus
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Gamma Radiation ◽  
Colloidal Silver ◽  
Colloidal Silver Nanoparticles

QUENCHING OF SURFACE PLASMON MODES IN COLLOIDAL SILVER NANOPARTICLES ON OZONIZATION

NANO ◽  
2006 ◽  
Vol 01 (03) ◽  
pp. 229-234
Author(s):  
R. K. RAKSHIT ◽  
SAYANTANI BHATTACHARYA ◽  
R. C. BUDHANI
Keyword(s):  
Silver Nanoparticles ◽  
Laser Ablation ◽  
Surface Plasmon ◽  
Effective Medium Theory ◽  
Plasmon Mode ◽  
Colloidal Silver ◽  
Medium Theory ◽  
Bright Yellow ◽  
Plasmon Peak ◽  
Colloidal Silver Nanoparticles

Oxidation characteristics of colloidal silver nanoparticles produced by pulsed laser ablation in pure and chemically treated water are studied as a function of the degree of ozonization. The bright yellow colloidal solution of silver characterized by a sharp surface plasmon mode at ~400 nm, becomes colorless in the initial stages of O 3 flow, and then acquires a brown hue with a broad plasmon peak centered at ~440 to ~450 nm on further ozonization. The solution again becomes colorless in a few days once the O 3 flow is stopped. We present a qualitative model for the reaction dynamics and analyze the optical absorption in the framework of an effective medium theory. The aqueous phase laser ablation chemistry described here provides a unique means to produce ionic silver for enhanced antimicrobial effects.

scholarly journals Effects of Colloidal Silver Nanoparticles on Sclerotium-Forming Phytopathogenic Fungi

2009 ◽  
Vol 25 (4) ◽  
pp. 376-380 ◽  
Author(s):  
Ji-Seon Min ◽  
Kyoung-Su Kim ◽  
Sang-Woo Kim ◽  
Jin-Hee Jung ◽  
Kabir Lamsal ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Phytopathogenic Fungi ◽  
Colloidal Silver ◽  
Colloidal Silver Nanoparticles
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