نتایج جستجو برای: silver nanoparticles

تعداد نتایج: 141266  

Journal: :Molecules 2017
Virginija Jankauskaitė Algirdas Lazauskas Egidijus Griškonis Aistė Lisauskaitė Kristina Žukienė

The most effective means to protect against bacterial invasion and to reduce the risk of healthcare-associated infections are antibacterial components synthesis. In this study, a novel process for the synthesis of organic-inorganic hybrid coatings containing silver nanoparticles is presented. Silver nanoparticles and polymer formation proceeds simultaneously through the in situ photoreduction o...

Journal: :Biomacromolecules 2009
Melissa M Kemp Ashavani Kumar Shaymaa Mousa Tae-Joon Park Pulickel Ajayan Natsuki Kubotera Shaker A Mousa Robert J Linhardt

Metal nanoparticles have been studied for their anticoagulant and anti-inflammatory efficacy in various models. Specifically, gold and silver nanoparticles exhibit properties that make these ideal candidates for biological applications. The typical synthesis of gold and silver nanoparticles incorporates contaminants that could pose further problems. Here we demonstrate a clean method of synthes...

2010
Binghui Wang Xupin Zhuang Wenjian Deng Bowen Cheng

Silver nanoparticles were prepared by microwave irradiation of silver nitrate solution with carboxymethyl chitosan as reducing agent and a stabilizer. The optical properties, morphology and structure were characterized using UV–Visible spectrophotometer, transmission electron microscope (TEM) and X-ray diffraction (XRD). Appearance of surface plasmon band at 413 nm indicated the formation of si...

2014
M. Vanaja K. Paulkumar M. Baburaja S. Rajeshkumar G. Gnanajobitha C. Malarkodi M. Sivakavinesan G. Annadurai

Nowadays plant mediated synthesis of nanoparticles has great interest and achievement due to its eco-benign and low time consuming properties. In this study silver nanoparticles were successfully synthesized by using Morinda tinctoria leaf extract under different pH. The aqueous leaf extract was added to silver nitrate solution; the color of the reaction medium was changed from pale yellow to b...

2014
Supriyo Chowdhury Arpita Basu Surekha Kundu

In recent years, green synthesis of nanoparticles, i.e., synthesizing nanoparticles using biological sources like bacteria, algae, fungus, or plant extracts have attracted much attention due to its environment-friendly and economic aspects. The present study demonstrates an eco-friendly and low-cost method of biosynthesis of silver nanoparticles using cell-free filtrate of phytopathogenic fungu...

2011
Angela Longo Gianfranco Carotenuto Mariano Palomba Sergio De Nicola

Thiol-capped silver nanoparticles were prepared by in situ thermal decomposition of different silver(I)-thiolates precursors in a polymeric matrix. Depending on the structure of the organic coating, contact-free distribution of metal nanoparticles or nanoparticles aggregates were achieved. The structure and morphology of nanocomposites was analyzed by Transmission Electron Microscopy (TEM), and...

2015
Bin Tang Ya Yao Jingliang Li Si Qin Haijin Zhu Jasjeet Kaur Wu Chen Lu Sun Xungai Wang

Different functions were imparted to ramie fibers through treatment with noble metal nanoparticles including silver and gold nanoparticles. The in situ synthesis of silver and gold nanoparticles was achieved by heating in the presence of ramie fibers in the corresponding solutions of precursors. The unique optical property of synthesized noble metal nanoparticles, i.e., localized surface plasmo...

2014
N Packialakshmi

The aim of this study was to synthesis of silver nanoparticles in the aqueous stem extracts of Caralluma fimbriyata and investigate its antibacterial activity. Nanoparticles are being used in many commercial applications. It was found that aqueous silver ions can be reduced by aqueous stem extracts of plant parts to generate to extremely stable silver nanoparticles in water. The chemical groups...

2015
Dulce G Romero-Urbina Humberto H Lara J Jesús Velázquez-Salazar M Josefina Arellano-Jiménez Eduardo Larios Anand Srinivasan Jose L Lopez-Ribot Miguel José Yacamán

Silver nanoparticles offer a possible means of fighting antibacterial resistance. Most of their antibacterial properties are attributed to their silver ions. In the present work, we study the actions of positively charged silver nanoparticles against both methicillin-sensitive Staphylococcus aureus and methicillin-resistant Staphylococcus aureus. We use aberration-corrected transmission electro...

2014
Ram Prasad Metuku Shivakrishna Pabba Samatha Burra S. V. S. S. S. L. Hima Bindu N Krishna Gudikandula M. A. Singara Charya

Development of reliable and eco-friendly process for synthesis of silver nanoparticles is an important step in the field of application in nanotechnology. One of the options to achieve this objective is to use natural biological processes. They have an advantage over conventional methods involving chemical agents associated with environmental toxicity. This study demonstrates the extra-cellular...

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