نتایج جستجو برای: fe3o4sio2 nanostructures

تعداد نتایج: 19096  

Journal: :journal of nanostructures 2012
m. jafar tafreshi m. fazli z. jafari ayoub

in this research, a sol gel autocaombustion route has been proposedto synthesize alumina-zirconia composite powders, usingammonium bicarbonate as a new fuel. then the effect of calcinationtemperature on phase transformation and crystallite sizes wasinvestigated. to characterize the products xrd, tem and betanalyses were used. xrd patterns of as-synthesized powder andcalcined powders at 1100 ◦c ...

Journal: :journal of nanostructures 2016
s. r. yousefi m. salavati-niasari d. ghanbari

nickel hydroxide nanostructures were synthesized by a hydrothermal reaction. the effect of different precursors and surfactants on the morphology of nickel hydroxide nanostructures was investigated. nanostructures were characterized by x-ray diffraction, energy dispersive x-ray spectroscopy, scanning electron microscopy and fourier transform infrared  spectroscopy. the influence of ni(oh)2 nano...

Magnesium hydroxide nanostructures as an effective flame retardant were synthesized by a facile and rapid microwave reaction. The effect of different surfactants such as cationic, anionic and polymeric on the morphology of magnesium hydroxide nanostructures was investigated. Nanostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform in...

In this study, null and one-dimensional nanoparticles and nanostructures of Ag and Ag-Cu were synthesized using polyol method. In order to prepare different nanostructures with the same synthesis route, thermodynamics and kinetic conditions of the system were manipulated. In the thermodynamics approach, the nanostructures with the minimum surface energy were obtained as the final product, while...

Journal: :journal of nanostructures 2014
m. yousefi

magnesium hydroxide nanostructures as an effective flame retardant were synthesized by a facile and rapid microwave reaction. the effect of different surfactants such as cationic, anionic and polymeric on the morphology of magnesium hydroxide nanostructures was investigated. nanostructures were characterized by x-ray diffraction (xrd), scanning electron microscopy (sem) and fourier transform in...

Journal: :journal of nanostructures 2012
m. zahedifar z. chamanzadeh

tm3+, yb3+ and tm3+/yb3+ doped lavo4 nanostructures were synthe-sized for the first time by using the hydrothermal method with the aid of la(ch3co2)3 as  lanthanum source in presence of oleic acid as surfactant. the products were characterized by x-ray diffraction (xrd), scanning electron microscopy (sem), transmission electron microscopy (tem), photoluminescence (pl) spectroscopy and uv–vis di...

In this paper an ultraviolet (UV) photodetector has been fabricated using ZnO nanostructures. The cheap fabrication process, high-quality nanostructures and the desired results for the photodetector are the most important characteristics of the proposed method. ZnO nanostructures have been grown using sol-gel method. In order to increase the sensitivity, calcium impurities have been added to na...

2014
Teng Li Hugh A. Bruck Peter W. Chung Liangbing Hu Zheng Jia

Title of Document: FAILURE MECHANICS OF FUNCTIONAL NANOSTRUCTURES IN ADVANCED TECHNOLOGIES Zheng Jia, Doctor of Philosophy, 2014 Directed By: Associate Professor Teng Li, Department of Mechanical Engineering The past decade has seen a surge of interest in developing novel functional nanostructures to enable advanced technologies, such as flexible electronics and high performance lithium-ion bat...

Journal: :journal of nanostructures 0
ashish karn st. anthony falls laboratory, university of minnesota twin cities, minneapolis, mn, usa nitesh kumar yale university, whitney avenue, new haven, ct, usa sivanandam aravindan indian institute of technology delhi, hauz khas, new delhi, india

the current study reports some interesting growth of novel in2o3 nanostructures using ambient-controlled chemical vapor deposition technique in the presence of a strongly reducing hydrazine ambient. the experiments are systematically carried out by keeping either of the carrier gas flow rate or the source temperature constant, and varying the other. for each of the depositions, the growth is st...

Journal: :journal of nanostructures 2015
a. esmaeili-bafghi-karimabad d. ghanbari m. salavati-niasari h. safardoust-hojaghan

various morphologies of silica nanoparticles were synthesized by a microwave-assisted pechini method. silica nanostructures were synthesized via a fast reaction between tetra ethyl ortho silicate and ammonia at presence citric acid and other effective agents in pechini procedure. then for preparation of polymer-matrix nanocomposites, sio2 nanoparticles were added to poly carbonate (pc) and poly...

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