نتایج جستجو برای: transmission electron microscopy

تعداد نتایج: 604183  

Journal: :iranian journal of pathology 2008
fatemeh mahjoub farrokh tirgari zarrin keyhani nargess tabarzan saghi vaziri

muscle tissue, skeletal muscle as well as cardiac muscle, is commonly affected in mitochondrial disorders. one explanation for this observation is that muscle tissue has a high-energy demand and therefore is more sensitive to a deficiency of mitochondrial energy production than some other tissues. in mitochondrial disorders, skeletal muscle tissue may be affected primarily by defective respirat...

Journal: :international journal of nano dimension 0
m. sadeghi department of chemistry, faculty of sciences, i.h.u, tehran, iran. s. l. sharifi department of chemistry, faculty of sciences, i.h.u, tehran, iran. h. hatami department of chemistry, faculty of sciences, i.h.u, tehran, iran.

zeolite fau type-y is one of the most studied framework of all zeolites, and has been used as catalysts for number of reactions in the refinery and petrochemical industry. in this research, nanocrystalline zeolite y was synthesized by hydrothermal method. the crystal size of zeolite y is influenced by temperature, aging time, alkalinity, and water content. the synthesized zeolite nay is identif...

Journal: :Scanning 2008
S J Pennycook

The scanning transmission electron microscope (STEM) allows collection of a number of simultaneous signals, such as cathodoluminescence (CL), transmitted electron intensity and spectroscopic information from individual localized defects. This review traces the development of CL and atomic resolution imaging from their early inception through to the possibilities that exist today for achieving a...

Journal: :Ultramicroscopy 2017
Jan Oliver Oelerich Lennart Duschek Jürgen Belz Andreas Beyer Sergei D Baranovskii Kerstin Volz

We present a new multislice code for the computer simulation of scanning transmission electron microscope (STEM) images based on the frozen lattice approximation. Unlike existing software packages, the code is optimized to perform well on highly parallelized computing clusters, combining distributed and shared memory architectures. This enables efficient calculation of large lateral scanning ar...

Journal: :international journal of nano dimension 0
m. riazian department of engineering, tonekabon branch, islamic azad university, tonekabon, iran. r. ramezani ayandegan institute of higher education, tonekabon, iran.

in this paper, a novel method of producing bi-metallic alloy nanoparticles at low temperatures using hydrogen bombardment of thin films, deposited on glass substrates, is introduced. optical and morphological characteristics of the nanoparticles were extensively studied for various conditions of plasma treatment, such as plasma power density, temperature, duration of hydrogen bombardment, thick...

Ehsanollah Amereh Leila Torkian Nourali Mohammadi

In the present study, a type of graphitic mesoporous carbon (denoted as GMC) is synthesized and its structural properties were characterized by nitrogen physisorption isotherms, transmission electron microscopy and Raman spectroscopy. According to BET and BJH methods, the specific surface area (SBET) and the average pore diameter of GMC are estimated to be 720 m2/g and 3.4 nm, respectively....

2017
W A Moeglein R Griswold B L Mehdi N D Browning J Teuton

In situ scanning transmission electron microscopy is being developed for numerous applications in the study of nucleation and growth under electrochemical driving forces. For this type of experiment, one of the key parameters is to identify when nucleation initiates. Typically, the process of identifying the moment that crystals begin to form is a manual process requiring the user to perform an...

2017
Xiahan Sang Andrew R. Lupini Jilai Ding Sergei V. Kalinin Stephen Jesse Raymond R. Unocic

Atomic-resolution imaging in an aberration-corrected scanning transmission electron microscope (STEM) can enable direct correlation between atomic structure and materials functionality. The fast and precise control of the STEM probe is, however, challenging because the true beam location deviates from the assigned location depending on the properties of the deflectors. To reduce these deviation...

Journal: :journal of nanostructures 0
xu liu school of materials science and engineering, yunnan university, 650091 kunming, people’s republic of china yan yang school of materials science and engineering, yunnan university, 650091 kunming, people’s republic of china yunfei han school of materials science and engineering, yunnan university, 650091 kunming, people’s republic of china lihong wang school of materials science and engineering, yunnan university, 650091 kunming, people’s republic of china gang chen school of materials science and engineering, yunnan university, 650091 kunming, people’s republic of china xuechun xiao school of materials science and engineering, yunnan university, 650091 kunming, people’s republic of china yude wang

single crystal zno microrods are deposited on the surface of zn plate through corrosion of zn plate by h2o2, which is a green neutral reagent and easy to transform to h2o and o2. the structure and morphology of the obtained zno microrods were characterized by x-ray diffraction (xrd), scanning electron microscopy (sem), transmission electron microscopy (tem) and electron diffraction. a thermodyn...

2017
Nouamane Laanait Maxim Ziatdinov Qian He Albina Borisevich

The availability of atomically resolved imaging modalities enables an unprecedented view into the local structural states of materials, which manifest themselves by deviations from the fundamental assumptions of periodicity and symmetry. Consequently, approaches that aim to extract these local structural states from atomic imaging data with minimal assumptions regarding the average crystallogra...

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