نتایج جستجو برای: multilayer nanostructure

تعداد نتایج: 25957  

2012
Jer-Chyi Wang Chih-Ting Lin Chia-Hsin Chen

In this study, Gd2O3 nanocrystal (Gd2O3-NC) memories with nanostructure tunneling layers are fabricated to examine their performance. A higher programming speed for Gd2O3-NC memories with nanostructure tunneling layers is obtained when compared with that of memories using a single tunneling layer. A longer data retention (< 15% charge loss after 104 s) is also observed. This is due to the incre...

ربانی, حسن, سلیمانی, صادق, مردانی, محمد,

In this study, we investigated the spin dependent electronic transport of a fishbone-like nanostructure including two magnetic atoms at its ends. The electronic conductance of this nanostructure for three different orientations of atomic magnetic moments was numerically studied when the structure was sandwiched between two nonmagnetic leads. By using Green’s function technique at the tight-bind...

Journal: :Nanotechnology 2009
D D Cheng M J Zheng L J Yao S H He L Ma W Z Shen X Y Kong

Uniform and vertical indium-oxide nanotube (IONT) arrays embedded well in n-type InP single crystal have been successfully prepared in situ by porous InP-template-assisted chemical vapor deposition (CVD). This IONT/InP nanostructure reveals high sensitivity to humidity at room temperature, which is ascribed to the ultrahigh surface-to-volume ratio of this nanostructure and the large number of o...

Journal: :international journal of nano dimension 0
m. riazian department of engineering, tonekabon branch, islamic azad university, tonekabon, iran

we report on the synthesis, morphology, chemically and structurally of tio2-nio-sio2 nanostructure. the tio2-nio-sio2 nanostructure was synthesized by a method based on the sol-gel method, by the simultaneous gelation of all cations. the coatings were deposited on dried soda-lime glass slides by spin coating. composite powders and coating on glass have been characterized by xrd, sem, edax, and ...

Journal: :international journal of nano dimension 0
s. sabbaghi nano chemical engineering dep. of shiraz university, shiraz, iran. h. orojlou nano technology research institute, shiraz university, shiraz, iran. m. r. parvizi research and development of boualisina petrochemical company,mahshahr, iran. r. saboori nano technology research institute, shiraz university, shiraz, iran. m. sahooli nano chemical engineering dep. of shiraz university, shiraz, iran.

in the past decades, many methods have been developed to synthesize zero- dimensional  nanoparticles, quasi–one–dimensional (1d) cuo nanostructures, such as metal organic deposition technique,  microwave irradiation, sol-gel-like dip  technique, reverse micelle-assisted route, chemical method, and simple template free solution route. among those synthesis methods, hydrothermal and chemical reac...

Journal: :journal of ultrafine grained and nanostructured materials 2014
ahmad keyvani mohsen saremi mahmoud heydarzadeh sohi

conventional and nanostructured ysz coatings were deposited on the in-738 ni super alloy by the atmospheric plasma spray technique. the oxidation was measured at 1100°c in an atmospheric electrical furnace. according to the experimental results the nanostructured coatings showed a better oxidation resistance than the conventional ones. the improved oxidation resistance of the nanocoating could ...

Journal: :Journal of the American Chemical Society 2013
Sumedh P Surwade Feng Zhou Bryan Wei Wei Sun Anna Powell Christina O'Donnell Peng Yin Haitao Liu

We describe a method to form custom-shaped inorganic oxide nanostructures by using DNA nanostructure templates. We show that a DNA nanostructure can modulate the rate of chemical vapor deposition of SiO2 and TiO2 with nanometer-scale spatial resolution. The resulting oxide nanostructure inherits its shape from the DNA template. This method generates both positive-tone and negative-tone patterns...

2016
Pedro M. Resende Ruy Sanz Alejandra Ruiz-de Clavijo Olga Caballero-Calero Marisol Martin-Gonzalez

The synthesis of a conformal three-dimensional nanostructure based on porous anodic alumina with transversal nanopores on wires is herein presented. The resulting three-dimensional network exhibits the same nanostructure as that obtained on planar geometries, but with a macroscopic cylindrical geometry. The morphological analysis of the nanostructure revealed the effects of the initial defects ...

Journal: :Arteriosclerosis, thrombosis, and vascular biology 2012
Christelle Yeromonahos Raphaël Marlu Benoît Polack Francois Caton

OBJECTIVE Because of the widespread clinical use of heparins, their effects on the enzymatic cascade are very well known. In contrast, little is known about the direct effect of heparins on the nanostructure of fibrin fibers, even though this nanostructure plays a major role in the mechanical strength and lysis of clots. This lack of reliable data can be correlated with the lack of a nonintrusi...

2008
M. Zergoug

Milling time is one of the most important factors for achieving the desired particle size of milled powders. Generally, the particle size of milled powders decreases with increasing milling time. However, long milling time results in agglomeration of small particles for some powders [9]. The using of the NDT method gives lot information about these microstructures in particular the magnetic NDT...

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