نتایج جستجو برای: silver nps

تعداد نتایج: 55731  

Journal: :Physical chemistry chemical physics : PCCP 2015
Guannan Zhang Junrong Li Aiguo Shen Jiming Hu

Anisotropic metallic nanoparticles (NPs) possess unique optical properties, which lend them to applications such as surface-enhanced Raman scattering (SERS). However, their preparation by an efficient, biocompatible and high yield synthetic method is still challenging. In this work, we demonstrate a simple and reproducible way to produce chitosan (CS) encapsulated gold-silver nanoflowers by seq...

2016
B. Syama Sundar

The morphology and anti bacterial activity of capped Silver Nanoparticles of 5-Methyl 2-mercapto benzimidazole prepared via chemical reduction is studied. Spherical shaped capped Ag-NPs with size of 40nm are obtained by treatment of aqueous silver ions with ethanolic solution of 5-Methyl 2-mercapto benzimidazole as capping agent .The synthesized nanoparticles are characterized by SEM, TEM, XRD,...

2012
Sungho Woo Jae Hoon Jeong Hong Kun Lyu Yoon Soo Han Youngkyoo Kim

We report an enhancement in the efficiency of organic solar cells via the incorporation of gold (Au) or silver (Ag) nanoparticles (NPs) in the hole-transporting buffer layer of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), which was formed on an indium tin oxide (ITO) surface by the spin-coating of PEDOT:PSS-Au or Ag NPs composite solution. The composite solution was synt...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2010
Fu Tang Fang He Huicong Cheng Lidong Li

A novel fluorescent nanoparticle was prepared via a simple self-assembly technique based on water-soluble conjugated polymers (CPs) and Ag@SiO(2) core-shell nanoparticles. Core-shell nanoparticles with silver NPs core show a unique property referred to as metal-enhanced fluorescence (MEF). In the present work, the cationic conjugated polymer poly[9,9'-bis(6''-(N,N,N-trimethylammonium)-hexyl) fl...

2010
Kamyar Shameli Mansor Bin Ahmad Wan Md Zin Wan Yunus Abdolhossein Rustaiyan Nor Azowa Ibrahim Mohsen Zargar Yadollah Abdollahi

In this study, silver nanoparticles (Ag-NPs) were synthesized using a green physical synthetic route into the lamellar space of montmorillonite (MMT)/chitosan (Cts) utilizing the ultraviolet (UV) irradiation reduction method in the absence of any reducing agent or heat treatment. Cts, MMT, and AgNO(3) were used as the natural polymeric stabilizer, solid support, and silver precursor, respective...

Journal: :iranian journal of pharmaceutical research 0
mitra korani deparment of pharmacology, faculty of medicine, tehran university of medical sciences, tehran, iran. seyed mehdi rezayat 1- deparment of pharmacology, faculty of medicine, tehran university of medical sciences, tehran, iran. 2- depatment of nanotechnology, faculty of advanced sciences and technology in medicine, tehran university of medical sciences, tehran, iran, 3- department of toxicology and pharmacology, pharmaceutical sciences branch, islamic azad university, tehran, iran. sepideh arbabi bidgoli department of toxicology and pharmacology, pharmaceutical sciences branch, islamic azad university, tehran, iran.

silver nanoparticles (ag nps) have been widely used as new potent antimicrobial agents in cosmetic and hygienic products. present study compares the tissue levels of ag nps in different organs of guiana pigs quantitatively after dermal application and analysis the morphological changes and pathological abnormalities on the basis of the ag nps tissue levels. before toxicological assessments,the ...

2015
Asmaa A Ashour Dina Raafat Hanan M El-Gowelli Amal H El-Kamel

BACKGROUND The growing threat of microbial resistance against traditional antibiotics has prompted the development of several antimicrobial nanoparticles (NPs), including silver NPs (AgNPs). In this article, a simple and eco-friendly method for the synthesis of AgNPs using the cranberry powder aqueous extract is reported. MATERIALS AND METHODS Cranberry powder aqueous extracts (0.2%, 0.5%, an...

Journal: :Toxicological sciences : an official journal of the Society of Toxicology 2010
Laura K Braydich-Stolle Benjamin Lucas Amanda Schrand Richard C Murdock Timothy Lee John J Schlager Saber M Hussain Marie-Claude Hofmann

Silver nanoparticles (Ag-NPs) are being utilized in an increasing number of fields and are components of antibacterial coatings, antistatic materials, superconductors, and biosensors. A number of reports have now described the toxic effects of silver nanoparticles on somatic cells; however, no study has examined their effects on the germ line at the molecular level. Spermatogenesis is a complex...

2015
Thomas R Bartlett Stanislav V Sokolov Richard G Compton

The field of nanoparticle (NP) sizing encompasses a wide array of techniques, with electron microscopy and dynamic light scattering (DLS) having become the established methods for NP quantification; however, these techniques are not always applicable. A new and rapidly developing method that addresses the limitations of these techniques is the electrochemical detection of NPs in solution. The '...

Journal: :Environmental pollution 2015
Marta Novo Elma Lahive María Díez-Ortiz Marianne Matzke Andrew J Morgan David J Spurgeon Claus Svendsen Peter Kille

Use of nanotechnology products is increasing; with silver (Ag) nanoparticles particularly widely used. A key uncertainty surrounding the risk assessment of AgNPs is whether their effects are driven through the same mechanism of action that underlies the toxic effects of Ag ions. We present the first full transcriptome study of the effects of Ag ions and NPs in an ecotoxicological model soil inv...

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