Ultralow Loading of Silver Nanoparticles on Mn2O3 Nanowires Derived with Molten Salts: A High-Efficiency Catalyst for the Oxidative Removal of Toluene

2015 ◽  
Vol 49 (18) ◽  
pp. 11089-11095 ◽  
Author(s):  
Jiguang Deng ◽  
Shengnan He ◽  
Shaohua Xie ◽  
Huanggen Yang ◽  
Yuxi Liu ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Molten Salts ◽  
High Efficiency ◽  
Oxidative Removal

Coupled Near- and Far-Field Scattering in Silver Nanoparticles for High-Efficiency, Stable, and Thin Plasmonic Dye-Sensitized Solar Cells

ChemSusChem ◽  
2014 ◽  
Vol 7 (9) ◽  
pp. 2461-2468 ◽  
Author(s):  
Gede Widia Pratama Adhyaksa ◽  
Se-Woong Baek ◽  
Ga In Lee ◽  
Dong Ki Lee ◽  
Jung-Yong Lee ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Solar Cells ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Far Field ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Three-Dimensional Surface-Enhanced Raman Scattering Substrate Fabricated Using Chemical Decoration of Silver Nanoparticles on Electrospun Polycarbonate Nanofibers

2016 ◽  
Vol 71 (5) ◽  
pp. 879-887 ◽  
Author(s):  
Murugesan Balamurugan ◽  
Jyisy Yang
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
High Efficiency ◽  
Three Dimensional ◽  
Surface Enhanced Raman Scattering ◽  
Simple Method ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

In this work, a simple method via decoration of silver nanoparticles (AgNPs) on electrospun polycarbonate nanofibers (PCNFs) was proposed to prepare highly sensitive three-dimensional (3D) substrates for surface-enhanced Raman scattering (SERS) measurements. The method proposed in this work gave a high sensitive Ag@PCNFs substrate, which resulted from a successful production of high surface area of PCNFs with a high efficiency in the decoration of AgNPs. To produce PCNFs suitable for SERS application, parameters in fabrication of PCNFs were systematically examined and correlated with their corresponding scanning electron microscope (SEM) images. Examined parameters included the concentration of PC solution, the solvent to form PC solution, the applied voltage, and the rotating speed of a drum collector. Using the optimized condition, the bead-free PCNFs with a diameter in the range of 200–400 nm were successfully produced. To increase the efficiency in decoration of AgNPs, the surface properties of PNCFs were altered with an organic solvent, which was selected experimentally with guidance of Hildebrand solubility parameter. Results indicated that methanol was the most suitable solvent to effectively decorate AgNPs on PCNFs. By probing with para-hydroxythiophenol (pHTP), prepared SERS substrates of Ag@PCNFs provided an enhancement factor to the order of 7, which is at least an order of magnitude larger than the reported values in the literature for SERS substrates prepared with the electrospinning technique.

scholarly journals Green synthesis of non-cytotoxic silver nanoparticles using Solanum nigrum leaves extract with antibacterial properties

2021 ◽  
Vol 15 (3) ◽  
pp. 262-271
Author(s):  
Anushaa A ◽  
Pushpa Agrawal ◽  
Vijaya Kumar G ◽  
Thippareddy KS
Keyword(s):  
Silver Nanoparticles ◽  
Foodborne Pathogens ◽  
High Efficiency ◽  
Antibacterial Properties ◽  
Cost Effective ◽  
Fibroblast Cell ◽  
Mouse Fibroblast ◽  
Solanum Nigrum ◽  
Simple Method ◽  
Efficiency Cost

Green synthesizes of silver nanoparticles is a promising method in material science and nanotechnology today. Silver nanoparticles (AgNP) were synthesized using a high-efficiency, cost-effective green and simple method at room temperature using Solanum nigrum leaves extract. The biosynthesized AgNP was validated and classified using spectroscopy profiles from ultraviolet-visible spectroscopy, scanning electron microscope, Fourier-transform infrared spectroscopy and x-ray diffraction. FTIR spectra indicated the presence of biological molecules in AgNP synthesis and UV-visible spectra revealed a surface resonance peak of 420 nm corresponding to AgNP formation. The antimicrobial potential of these synthesized nanoparticles is evaluated against the bacteria Escherichia coli (MCC 2079) and Staphylococcus aureus (MCC 2408), both of which are important foodborne pathogens. Ciprofloxacin and Clotrimazole were used as positive controls antibiotic. The nanoparticles were shown to have strong antibacterial efficacy against the strains examined. Their antibacterial function allows them to be included in antimicrobial formulations. By using the MTT assay, the biocompatibility of Solanum nigrum silver nanoparticles were found non-toxic to mouse fibroblast cell lines (L929 is one of the first in continuous culture to be created. The L strain was generated from a male C3H mouse's usual subcutaneous areolar and adipose tissue.) at lower concentrations.

Investigation of Genotoxicity and Cytotoxicity of Nanocomposite Highly Dispersed Silica with Silver Nanoparticles

10.12737/2725 ◽  
2013 ◽  
Vol 20 (4) ◽  
pp. 44-47
Author(s):  
Савченко ◽  
D. Savchenko
Keyword(s):  
Silver Nanoparticles ◽  
Antimicrobial Agents ◽  
High Efficiency ◽  
Practical Interest ◽  
Eukaryotic Cell ◽  
New Drugs ◽  
Carcinoma Larynx ◽  
Highly Dispersed Silica ◽  
Toxicological Studies ◽  
Highly Dispersed

Provision of high efficiency and quality of drugs developed on the basis of nanotechnology is possible only under the requirements for the development, research, production and introduction of new pharmacological agents. Determination of genotoxicity and cytotoxicity is the first stage of toxicological studies of newly synthetized substances, the aim of which is to determine the ability to induce primary DNA and cell cultures damages. Such studies provide information about primary toxic effects of substances and constitute a basis for confirming the safety of new drugs. Considering a constant need for the introduction of new antimicrobial agents for treatment of intestinal infections, it is expedient to develop combinative drugs which will have better efficacy and safety. Significant scientific and practical interest has study of drugs based on nanosilver, which is active against antibiotic-resistant microorganisms. By the Department of Pharmacology and Clinical Pharmacology of Bogomoletz National Medical University and Chuiko Institute of Surface Chemistry NAS of Ukraine was specifically designed and synthesized nanocomposite highly dispersed silica with silver nanoparticles, which is considered as a promising drug with a complex of antibacterial and sorption-detoxication properties. The purpose of this work is to study the cytotoxicity and genotoxicity of nanocomposite highly dispersed silica with silver nanoparticles. The degree of DNA damage by nanocomposite was studied by alkaline gel electrophoresis of isolated cell test culture CHO-Kl. Investigation of cytotoxicity was carried out on passaged eukaryotic cell culture of human epidermoid carcinoma larynx (Hep-2). It is shown that nanocomposite highly dispersed silica with silver nanoparticles does not have genotoxic properties, and its cytotoxicity disappears at concentrations below 0,007%.

Effect of silver nanoparticles on biofilms of microorganisms (review)

10.12737/8117 ◽  
2015 ◽  
Vol 9 (1) ◽  
pp. 0-0
Author(s):  
Гладких ◽  
P. Gladkikh
Keyword(s):  
Silver Nanoparticles ◽  
High Efficiency ◽  
Antibacterial Properties ◽  
Silver Ions ◽  
Experimental Models ◽  
Human Pathogens ◽  
Antibiotic Resistant ◽  
Medical Supplies ◽  
Antibiotic Drugs

Nanotechnology enter in all spheres of human activity, particularly in medicine. Using nanoprogress allows the use of various nanostructures in the traditional methods therapy of various pathologies. The growing resistance to antibiotic drugs among human pathogens strains of microorganisms requires the development of alternatives. Silver nanoparticles are current contenders for the role of an alternative to modern antibiotics. They are able to transfer therapeutic agents, act on the membrane of microbial cells, disrupting their livelihoods and leading to death, as they are less toxic than silver ions. The use of nanoparticles is an effective tool in combating formed biofilms on medical supplies, and prevent to their education. Nanoparticles have proved positively against many antibiotic-resistant strains of microorganisms, including planktonic phase P. aureginosa. Synergistic effect observed while using of nanoparticles and various antibiotics. Antibacterial properties studied in experimental models of peritonitis and meningoencephalitis. In case of peritonitis high efficiency.

Silver Nanoparticles Production with Probiotic Bacteria

2016 ◽  
Vol 851 ◽  
pp. 32-36
Author(s):  
Denisa Sásková ◽  
Jaromír Pořízka ◽  
Pavel Kulich ◽  
Alena Španová ◽  
Pavel Diviš ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Biomedical Applications ◽  
High Efficiency ◽  
Optical Emission ◽  
Bactericidal Effect ◽  
Emission Spectrometry ◽  
Colloidal Silver ◽  
Bacterial Cells ◽  
Electron Microscopy Level ◽  
Transmission Electron

Silver nanoparticles (colloidal silver) have a bactericidal effect against a variety of bacteria, fungi and viruses. They are promising for biomedical applications due to the limited toxicity against eukaryotic cells. Important role in the silver nanoparticles production have various microorganisms including lactic acid bacteria of the genus Lactobacillus. Probiotic Lactobacillus species are good candidates for nanoparticles producing in the laboratory and in industrial scale, too. The aim of this work was to test the production of colloidal silver nanoparticles with probiotic species Lactobacillus casei. Nanoparticles production was tested in the reaction mixtures (phosphate buffer, glucose, bacterial cells) upon addition of varying concentrations of AgNO3 (1 - 4mM). Production of the silver nanoparticles was proven by screening of reaction mixtures by Transmission electron microscopy. Level of Ag+ ions utilization to nanoparticles was analysed by optical emission spectrometry. Results showed high efficiency of nanosilver production with narrow size distribution of nanoparticles (12 - 27nm).

Green Synthesized Silver Nanoparticles: A Promising Anticancer Agent

2020 ◽  
Vol 19 (04) ◽  
pp. 1950027 ◽  
Author(s):  
Samuel Shiferaw Biresaw ◽  
Samrawit Mekonnen Damte ◽  
Pankaj Taneja
Keyword(s):  
Silver Nanoparticles ◽  
High Efficiency ◽  
Synergistic Effects ◽  
In Vivo Model ◽  
Cytotoxic Activities ◽  
Coating Agent ◽  
Synthesis Strategy ◽  
Physical And Chemical

Silver nanoparticles (AgNPs) have attracted a great deal of attention in the recent years. It is mostly due to their availability, chemical stability, catalytic activity, conductivity, biocompatibility and anticancer activity. There are three major approaches for AgNPs synthesis; i.e., chemical, physical, and biological methods. Today, many chemical and physical methods have become less popular due to usage of hazardous chemicals or their high costs, respectively. The green method has introduced an appropriate substitute synthesis strategy for the conventional physical and chemical approaches. The utilization of the plant extracts as reducing, stabilizing and coating agent of AgNPs is an interesting eco-friendly approach leading to high efficiency. The anticancer synergistic effects among the AgNPs and phytochemicals will enhance their therapeutic potentials. Surprisingly, although many studies have demonstrated the significant enhancement in cytotoxic activities of plant-mediated AgNPs toward cancerous cells, these nanoparticles (NPs) have been found nontoxic to normal human cells in their therapeutic concentrations. This paper provides a specific insight into the mechanism of plant-mediated AgNPs synthesis, their anticancer and cytotoxic activities in vitro cancer cells, in vivo model animals and clinical trials.

Hierarchical self-assembly of random mica nanosheet-stabilized silver nanoparticles into flower microstructures for highly sensitive SERS substrates

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86522-86528 ◽  
Author(s):  
Chih-Wei Chiu ◽  
Po-Hsien Lin
Keyword(s):  
Silver Nanoparticles ◽  
Self Assembly ◽  
High Efficiency ◽  
Use Of Self ◽  
Sers Substrates ◽  
Highly Sensitive ◽  
Self Assembled

The use of self-assembled novel flower-like microstructures as SERS substrates allowed high-efficiency detection of adenine molecules from DNA.

Sign in / Sign up

Export Citation Format

Share Document