نتایج جستجو برای: Ag Nanoparticles

تعداد نتایج: 146569  

Journal: :journal of nanostructures 2012
s. darvishi s. m. borghei s. a. hashemizadeh

in this study, silver nanoparticles were synthesized by chemical reduction method at different concentrations of ag colloid in the range of 500-16000 ppm. nanoparticles were deposited by spin coating method on pre-etched glass and si substrates. structural, optical and electrical properties of the samples were studied using scanning electron microscopy equipped with edax, uv-vis spectrophotomet...

Journal: :physical chemistry research 0
salimeh kimiagar islamic azad university- central tehran branch - tehran - iran

tio2 thin films and ag/tio2 nanoparticles were prepared by cvd and plasma bombardment method. xrd results showed the presence of ag nanoparticles in tio2 matrix. sem image confirmed formation of ag nanoparticles. xps analysis was utilized to study the chemical state of the ag/tio2 nanostructure. statistical surface analysis revealed that since there is a linear relation between logarithmic diag...

Journal: :iranian journal of pharmaceutical research 0
md. mamun or rashid lecturer, department of pharmacy, noakhali science and technology university, sonapur, noakhali-3814, bangladesh. md. shafiul islam lecturer, department of applied chemistry and chemical engineering, noakhali science and technology university, sonapur, noakhali-3814, bangladesh. md. azizul haque lecturer, department of applied chemistry and chemical engineering, noakhali science and technology university, sonapur, noakhali-3814, bangladesh. md. arifur rahman lecturer, department of microbiology, noakhali science and technology university, sonapur, noakhali-3814, bangladesh. md. tanvir hossain assistant professor, department of applied chemistry and chemical engineering, noakhali science and technology university, sonapur, noakhali-3814, bangladesh. md. abdul hamid department of pharmacy, noakhali science and technology university, sonapur, noakhali-3814, bangladesh.

plants or natural resources have been found to be a good alternative method for nanoparticles synthesis. in this study, polyaniline coated silver nanoparticles (agnps) synthesized from piper betle leaves extract were investigated for their antibacterial activity. silver nanoparticles were prepared from the reduction of silver nitrate and nabh4 was used as reducing agent. silver nanoparticles an...

Journal: :Nanomedicine : nanotechnology, biology, and medicine 2007
Jun Sung Kim Eunye Kuk Kyeong Nam Yu Jong-Ho Kim Sung Jin Park Hu Jang Lee So Hyun Kim Young Kyung Park Yong Ho Park Cheol-Yong Hwang Yong-Kwon Kim Yoon-Sik Lee Dae Hong Jeong Myung-Haing Cho

The antimicrobial effects of silver (Ag) ion or salts are well known, but the effects of Ag nanoparticles on microorganisms and antimicrobial mechanism have not been revealed clearly. Stable Ag nanoparticles were prepared and their shape and size distribution characterized by particle characterizer and transmission electron microscopic study. The antimicrobial activity of Ag nanoparticles was i...

Journal: :مجله بین المللی علوم آزمایشگاهی 0
seyedhossein hekmatimoghaddam ali jebali bahram kazemi mohammadagha ayatollahi

background and aims: although metal and metal oxide nanoparticles are used in different medical applications, they may have considerable toxicity on various cells, such as myocytes. therefore, this study aimed to evaluate the toxicity of the naked and serum-treated silver nanoparticles (ag nps) and magnesium oxide nanoparticles (mgo nps) on the cardiomyocytes. materials and methods: cardiomyocy...

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...

Journal: :The journal of physical chemistry. B 2005
Amanda J Haes Jing Zhao Shengli Zou Christopher S Own Laurence D Marks George C Schatz Richard P Van Duyne

A novel method to produce solution-phase triangular silver nanoparticles is presented. Ag nanoparticles are prepared by nanosphere lithography and are subsequently released into solution. The resulting nanoparticles are asymmetrically functionalized to produce either single isolated nanoparticles or dimer pairs. The structural and optical properties of Ag nanoparticles have been characterized. ...

2014
K. ROY C. K. SARKAR C. K. GHOSH

The green synthesis route, in comparison to the conventional chemical and physical procedures, is an easy and eco-friendly alternative to synthesize metallic nanoparticles. Here, we report a cost-effective, clean and fast bio-process to synthesize Ag nanoparticles after reduction of Ag + using apple (Malus domestica) fruit extract. The formation of silver nanoparticles was first examined by UV-...

2016
Seong Baek Yang Mohammad Mahbub Rabbani Byung Chul Ji Dong-Wook Han Joon Seok Lee Jong Won Kim Jeong Hyun Yeum

The optimum conditions for the fabrication of zein/Ag composite nanoparticles from ethanol/H₂O cosolvents using electrospinning and the properties of the composite were investigated. The zein/Ag nanoparticles were characterized using field-emission scanning electron microscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), and thermogravimetric analysis. The antibacterial act...

Journal: :international journal of nano dimension 0
babak sadeghi department of chemistry, tonekabon branch, islamic azad university, tonekabon, iran. sh. ghammamy department of chemistry, faculty of science, imam khomeini international university, qazvin, iran. s. sedaghat department of chemistry, faculty of science, islamic azad university, malard branch, malard, iran.

we have used lithium aluminum hydroxide reducing method of silver nitrate to prepare heterogeneous silver-silica nanocomposite particles with thiol and amino groups serving to bind the ag nanoparticles to the surfaces of the sio2 nanoparticles. we examined products of these reductions using ftir, sem, xrd and uv-vis. spectroscopy. the sio2 nanoparticles had diameters ranging from 70 to 90 nm; t...

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