نتایج جستجو برای: nano structure characterization

تعداد نتایج: 1945527  

Journal: :international journal of nanoscience and nanotechnology 2010
d. salari a. niaei s. a. hosseini r. aleshzadeh h. afshary

this paper reports results of a study regarding the activities of nano structure mn/γ-al2o3 and γ-al2o3 catalysts for oxidation of 2-propanol (as a model of volatile organic compound). nanostructure of catalysts was revealed using xrd, sem and tem techniques. catalytic studies were carried out in u-shaped packed bed reactor under atmospheric pressure and at the reaction temperature of 150- 500°...

Journal: :international journal of iron & steel society of iran 2015
m. golzar shahri m. salehi s. r. hosseini

the mechanical properties and microstructural developments of 321 stainless steel during thermomechanicalprocess were investigated. the repetitive cold rolling and subsequent annealing wereconducted to achieve nanocrystalline structure in an aisi 321 stainless steel. heavily cold rolling at−20°c was conducted to form martensite in metastable austenitic steel. the process was followed byannealin...

Journal: :Nano Letters 2021

Developing nanoscale electrical characterization techniques adapted to three-dimensional (3D) geometry is essential for optimization of the epitaxial structure and doping process nano- microwires. In this paper, we demonstrate assessment depletion width as well profile at individual microwire core–shell light-emitting devices by capacitance–voltage measurements. A statistical study carried out ...

Journal: :Nanotechnology 2008
Howon Kim Goo-Eun Jung Jin-Hyung Lim Kyung Hoon Chung Se-Jong Kahng Won-Joon Son Seungwu Han

The growth behavior and atomic structure of Mn germanide, grown on Ge(001), is studied with x-ray diffraction and scanning probe microscopy. The amorphous clusters of as-deposited Mn are crystallized into Mn(5)Ge(3) nano-islands with a size of ∼100 nm by solid phase epitaxy. At low coverage, the shape of the nano-islands is plateau-like, while at increased coverage it becomes mound-like. At the...

2015
Amirul Abd Rashid

Tungsten oxide (WO3) nanostructure were synthesized by a facile hydrothermal method at 150° C using tungstate dehydrates (Na2WO4.2H2O) as the precursor. Without any additive, scanning electron microscopy revealed a rhombus shaped WO3 nanostructures while with the addition of sodium chloride, the morphology changes to nano-dagger bundles that formed flower-like structure. Furthermore, the size o...

2016
Maria Antonietta Ferrara Edoardo De Tommasi Giuseppe Coppola Luca De Stefano Ilaria Rea Principia Dardano

The frustule of diatoms, unicellular microalgae, shows very interesting photonic features, generally related to its complicated and quasi-periodic micro- and nano-structure. In order to simulate light propagation inside and through this natural structure, it is important to develop three-dimensional (3D) models for synthetic replica with high spatial resolution. In this paper, we present a new ...

Journal: :CoRR 2012
A. M. Dorman

Constructive theory of characterization test is considered in a proposed article. The theory is applicable to an electronic nano devices characterization. E.g. is a currentvoltage test particularly differential conductance test. Another application is an auger currentelectron energy spectroscopy test. Generally small response of device under test on an applied stimulus is masked by an unknown d...

2008
Armando Rastelli Ata Ulhaq Suwit Kiravittaya Lijuan Wang Artur Zrenner Oliver G. Schmidt

One of the biggest challenges of nanotechnology is the fabrication of nano-objects with perfectly controlled properties. Here we employ a focused laser beam both to characterize and to in-situ modify single semiconductor structures by heating them from cryogenic to high temperatures. The heat treatment allows us to blue-shift, in a broad range and with resolution-limited accuracy, the quantized...

2014
Izabella Rajzer Elżbieta Menaszek Ryszard Kwiatkowski Wojciech Chrzanowski

New nanocomposite membranes with high bioactivity were fabricated using the electrospinning. These nanocomposites combine a degradable polymer poly(L/DL)-lactide and bone cell signaling carbonate nano-hydroxyapatite (n-HAp). Chemical and physical characterization of the membranes using scanning electron microscopy, Fourier transform infrared spectroscopy and the wide angle X-ray diffraction evi...

2017
Chengkun Ma Hailong Chen Chao Wang Jifeng Zhang Hui Qi Limin Zhou

Based on the optimal proportion of resin and curing agent, an ultrahigh-temperature inorganic phosphate adhesive was prepared with aluminum dihydric phosphate, aluminium oxide ( α -Al₂O₃), etc. and cured at room temperature (RT). Then, nano-aluminum nitride (nano-AlN), nano-Cupric oxide (nano-CuO), and nano-titanium oxide (nano-TiO₂) were added into the adhesive. Differential scanning calorimet...

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