SERS detection and antibacterial activity from uniform incorporation of Ag nanoparticles with aligned Si nanowires

2015 ◽  
Vol 355 ◽  
pp. 197-202 ◽  
Author(s):  
Chia-Yun Chen ◽  
Li-Jen Hsu ◽  
Po-Hsuan Hsiao ◽  
Chang-Tze Ricky Yu
Keyword(s):  
Antibacterial Activity ◽  
Ag Nanoparticles ◽  
Si Nanowires ◽  
Sers Detection

scholarly journals Biogenic synthesis of silver nanoparticles from waste banana plant stems and their antibacterial activity against Escherichia coli and Staphylococcus Epidermis

2017 ◽  
Vol 5 (9) ◽  
pp. 3769 ◽  
Author(s):  
Huu Dang ◽  
Derek Fawcett ◽  
Gerrard Eddy Jai Poinern
Keyword(s):  
Escherichia Coli ◽  
Antibacterial Activity ◽  
Ag Nanoparticles ◽  
Inhibition Zone ◽  
Gram Negative Bacteria ◽  
Banana Plant ◽  
Biogenic Synthesis ◽  
Maximum Inhibition ◽  
Staphylococcus Epidermis ◽  
First Time

Background: This study for the first time presents an eco-friendly and room temperature procedure for biologically synthesizing silver (Ag) nanoparticles from waste banana plant stems.Methods: A simple and straightforward green chemistry based technique used waste banana plant stems to act as both reducing agent and capping agent to produce Ag nanoparticles, which were subsequently characterized. In addition, antibacterial studies were conducted using the Kirby-Bauer sensitivity method.Results: Advanced characterisation revealed the Ag nanoparticles had a variety of shapes including cubes, truncated triangular and hexagonal plates, and ranged in size from 70 nm up to 600 nm. The gram-negative bacteria Escherichia coli showed the maximum inhibition zone of 12 mm.Conclusions: The study has shown that waste banana plant stems can generate Ag nanoparticles with antibacterial activity against Escherichia coli and Staphylococcus epidermis.

Antibacterial activity of Ag nanoparticles/phosphomolybdate/reduced graphene oxide nanocomposite: Kinetics and mechanism insights

2020 ◽  
Vol 262 ◽  
pp. 114709 ◽  
Author(s):  
Marjan Moghayedi ◽  
Elaheh K. Goharshadi ◽  
Kiarash Ghazvini ◽  
Hossein Ahmadzadeh ◽  
Majid Namayandeh Jorabchi
Keyword(s):  
Antibacterial Activity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Ag Nanoparticles ◽  
Kinetics And Mechanism ◽  
Reduced Graphene

scholarly journals Towards understanding the antibacterial activity of Ag nanoparticles: electron microscopy in the analysis of the materials-biology interface in the lung

2015 ◽  
Vol 2 (4) ◽  
pp. 312-326 ◽  
Author(s):  
M. López-Heras ◽  
I. G. Theodorou ◽  
B. F. Leo ◽  
M. P. Ryan ◽  
A. E. Porter
Keyword(s):  
Electron Microscopy ◽  
Antibacterial Activity ◽  
Ag Nanoparticles ◽  
Bacterial Infections ◽  
Pulmonary System

Bacterial infections of the pulmonary system are increasing.

scholarly journals Additional Effects of Silver Nanoparticles on Bactericidal Efficiency Depend on Calcination Temperature and Dip-Coating Speed

2011 ◽  
Vol 77 (16) ◽  
pp. 5629-5634 ◽  
Author(s):  
Nhung Thi Tuyet Le ◽  
Hirofumi Nagata ◽  
Mutsumi Aihara ◽  
Akira Takahashi ◽  
Toshihiro Okamoto ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Calcination Temperature ◽  
Ag Nanoparticles ◽  
High Speed ◽  
Dip Coating ◽  
Catalyst Loading ◽  
Bacterial Inactivation ◽  
Coated Glass ◽  
High Calcination Temperature

ABSTRACTThere is an increasing interest in the application of photocatalytic properties for disinfection of surfaces, air, and water. Titanium dioxide is widely used as a photocatalyst, and the addition of silver reportedly enhances its bactericidal action. However, the synergy of silver nanoparticles and TiO2is not well understood. The photocatalytic elimination ofBacillus atrophaeuswas examined under different calcination temperatures, dip-coating speeds, and ratios of TiO2, SiO2, and Ag to identify optimal production conditions for the production of TiO2- and/or TiO2/Ag-coated glass for surface disinfection. Photocatalytic disinfection of pure TiO2or TiO2plus Ag nanoparticles was dependent primarily on the calcination temperature. The antibacterial activity of TiO2films was optimal with a high dip-coating speed and high calcination temperature (600°C). Maximal bacterial inactivation using TiO2/Ag-coated glass was also observed following high-speed dip coating but with a low calcination temperature (250°C). Scanning electron microscopy (SEM) showed that the Ag nanoparticles combined together at a high calcination temperature, leading to decreased antibacterial activity of TiO2/Ag films due to a smaller surface area of Ag nanoparticles. The presence of Ag enhanced the photocatalytic inactivation rate of TiO2, producing a more pronounced effect with increasing levels of catalyst loading.

scholarly journals Antibacterial and UV protective properties of polyamide fabric impregnated with TiO2/Ag nanoparticles

2015 ◽  
Vol 80 (5) ◽  
pp. 705-715 ◽  
Author(s):  
Milica Milosevic ◽  
Ana Krkobabic ◽  
Marija Radoicic ◽  
Zoran Saponjic ◽  
Vesna Lazic ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Ag Nanoparticles ◽  
Uv Protection ◽  
Bacterial Reduction ◽  
Protective Properties ◽  
Polyamide Fabric ◽  
Uv Protective Properties

The possibility of in situ photoreduction of Ag+ ions using colloidal TiO2 nanoparticles deposited on the surface of polyamide fabric in the presence of amino acid alanine and methyl alcohol is discussed. The presence of TiO2/Ag nanoparticles on the polyamide fabric was confirmed by FESEM and ICP analyses. Antibacterial activity of the fabric was tested against Gram-negative bacterium Escherichia coli and Gram-positive bacterium Staphylococcus aureus. Fabricated TiO2/Ag nanoparticles on the surface of polyamide fabric provided maximum bacterial reduction and thus, excellent antibacterial activity. In spite of silver leaching from the fabric during washing, impregnated polyamide fabric preserved maximum reduction of Escherichia coli colonies. Antibacterial activity against Staphylococcus aureus slightly decreased after ten washing cycles, but still antibacterial activity can be considered as satisfactory. In addition, the presence of TiO2/Ag nanoparticles ensured better UV protection efficiency which belongs to very good UV protection category.

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