نتایج جستجو برای: silver cobalt nanoparticles

تعداد نتایج: 169452  

Journal: :Physical chemistry chemical physics : PCCP 2014
Robin Jude Vimal Michael Balaji Sambandam Thangavelu Muthukumar Manickam J Umapathy Periakaruppan T Manoharan

Silver doped zinc oxide nanoparticles are synthesized by a solution combustion method. The samples characterized by a variety of spectroscopic and other techniques clearly reveal the presence of silver nanoparticles as well as silver clusters. The silver in the two forms was identified by careful deconvolution of X-ray photoelectron spectral results. Their formation was also confirmed by the pr...

2015
Lung-Shuo Wang Chih-Yu Wang Chih-Hui Yang Chen-Ling Hsieh Szu-Yu Chen Chi-Yen Shen Jia-Jung Wang Keng-Shiang Huang

Silver nanoparticles have been used in various fields, and several synthesis processes have been developed. The stability and dispersion of the synthesized nanoparticles is vital. The present article describes a novel approach for one-step synthesis of silver nanoparticles-embedded chitosan particles. The proposed approach was applied to simultaneously obtain and stabilize silver nanoparticles ...

2011
N. Savithramma M. Linga Rao K. Rukmini

Biologically synthesized silver nanoparticles (SNPs) are being widely using in the field of medicine. Extracellular biosynthesis of silver nanoparticles was carried out by using medicinal plant extracts for the reduction of aqueous silver ions in short period. The silver nanoparticles formation was confirmed by the colour change of plant extracts (SNPs) and further confirmed with the help of UV...

2010
EK. Elumalai T. N. V. K. V. Prasad J. Hemachandran S. Viviyan Therasa T. Thirumalai E David

Aqueous extract of shade dried leaves of Euphorbia hirta (L) was used for the synthesis of silver (Ag) nanoparticles. UV-visible spectroscopy studies were carried out to assess the formation Ag nanoparticles. Scanning Electron Microscopic (SEM) was used to characterize the Ag nanoparticles. SEM image divulges that silver nanoparticles are quite polydispersed, the size ranging from 40 nm to 50 n...

2005
Sufi R. Ahmed Peter Kofinas

The morphology and magnetic properties of diblock copolymer templated ferrimagnetic cobalt oxide nanoparticles are reported. Ring opening metathesis polymerization (ROMP) was used to synthesize a novel cobalt diblock copolymer, where cobalt is directly attached to the polymer chain. Gel permeation chromatography (GPC) was performed to determine molecular weight distribution. Transmission electr...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2005
Katarina Gmucová Lívia Chitu Eva Majková Alexander Satka Michael Giersig Michael Hilgendorff

The adsorption of cobalt nanoparticles on a carbon microfiber surface has been electrochemicaly detected. The redox processes observed in an electrochemical cell filled with redistilled water and equipped with the carbon fiber microelectrode modified by cobalt nanoparticles have been compared to those observed in an aqueous solution of Co2+ cations. The movement of the adsorbed nanoparticles ha...

2009
Mona Safaepour Ahmad Reza Shahverdi Hamid Reza Shahverdi Mohammad Reza Khorramizadeh Ahmad Reza Gohari

Many reports have been published about the biogenesis of silver nanoparticles using several plant extracts such as Pelargonium graveolens (P.graveolens- geranium) and Azadirachta indica (neem) but the capacity of their natural reducing constituents to form silver nanoparticles has not yet been studied. In this research the synthesis of silver nanoparticles using geraniol has been investigated. ...

2014
Sumaira Ashraf Mariyam Asghar Chatha Wardah Ejaz Hussnain Ahmed Janjua Irshad Hussain

Lysozyme, an antibacterial enzyme, was used as a stabilizing ligand for the synthesis of fairly uniform silver nanoparticles adopting various strategies. The synthesized particles were characterized using UV-visible spectroscopy, FTIR, dynamic light scattering (DLS), and TEM to observe their morphology and surface chemistry. The silver nanoparticles were evaluated for their antimicrobial activi...

2015
Priyanka Singh Yeon Ju Kim Hina Singh Chao Wang Kyu Hyon Hwang Mohamed El-Agamy Farh Deok Chun Yang

In the present study, the strain Brevibacterium frigoritolerans DC2 was explored for the efficient and extracellular synthesis of silver nanoparticles. These biosynthesized silver nanoparticles were characterized by ultraviolet-visible spectrophotometry, which detected the formation of silver nanoparticles in the reaction mixture and showed a maximum absorbance at 420 nm. In addition, field emi...

2016
S. Surya G. Dinesh Kumar R. Rajakumar

Silver nanoparticles (SNPs) exhibit magnificent applications in medicine as antimicrobial agent. The use of different plant parts for the synthesis of nanoparticles is considered as a green technology. This technology is one of the best eco-friendly method and does not gives any harmful effect. The present study deals with the flower extract of medicinal plant Hibiscus rosa-sinensis and to eval...

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