scholarly journals FEATURES OF CU - NI NANOPARTICLE SYNTHESIS: EXPERIMENT AND COMPUTER SIMULATION

2020 ◽  
pp. 293-309
Author(s):  
Валентин Иванович Романовский ◽  
Андрей Юрьевич Колосов ◽  
Александр Александрович Хорт ◽  
Владимир Сергеевич Мясниченко ◽  
Кирилл Борисович Подболотов ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Nickel Nanoparticles ◽  
Nanoparticle Synthesis ◽  
Relative Displacement ◽  
Neck Formation ◽  
Cubic Crystal ◽  
X Ray ◽  
The Monte Carlo Method ◽  
Initial Location ◽  
Synthesis Experiment

Сочетание эксперимента и компьютерного моделирования позволили исследовать особенности процесса синтеза наночастиц Cu - Ni. Наночастицы синтезированы методом экзотермического горения в растворах. Рентгено-фазовый анализ полученных материалов показал, что все образцы представляют собой чистые биметаллические нанопорошки с искаженной кубической кристаллической структурой каждого металла. Методом Монте-Карло в температурном диапазоне от 300 до 600 K установлены закономерности формирования манжеты для двух случаев начального расположения наночастиц меди и никеля: непосредственное соприкосновение и относительное смещение на величину 0,2 нм. Показана возможность тесной интеграции кристаллических структур в результате взаимодействия наночастиц Cu и Ni. Combination of experiment and computer simulation made it possible to study the features of the process of Cu - Ni nanoparticle synthesis. Nanoparticles are synthesized by the method of exothermic combustion in solutions. The X-ray phase analysis of the obtained materials showed that all samples are pure bimetallic nanopowders with a distorted cubic crystal structure of each metal. The Monte-Carlo method in the temperature range from 300 to 600 K established regularities of the neck formation for two cases of the initial location of copper and nickel nanoparticles: direct contact and relative displacement by 0,2 nm. The possibility of close integration of crystal structures as a Cu and Ni nanoparticles interaction result is shown.

scholarly journals Advances in Nickel Nanoparticle Synthesis via Oleylamine Route

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 713
Author(s):  
Maria Heilmann ◽  
Hannes Kulla ◽  
Carsten Prinz ◽  
Ralf Bienert ◽  
Uwe Reinholz ◽  
...  
Keyword(s):  
Nickel Nanoparticles ◽  
Synthesis Method ◽  
Nanoparticle Synthesis ◽  
Research Area ◽  
No Oxidation ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Scattering ◽  
Transmission Electron ◽  
Active Research

Nickel nanoparticles are an active research area due to their multiple applications as catalysts in different processes. A variety of preparation techniques have been reported for the synthesis of these nanoparticles, including solvothermal, microwave-assisted, and emulsion techniques. The well-studied solvothermal oleylamine synthesis route comes with the drawback of needing standard air-free techniques and often space-consuming glassware. Here, we present a facile and straightforward synthesis method for size-controlled highly monodisperse nickel nanoparticles avoiding the use of, e.g., Schlenk techniques and space-consuming labware. The nanoparticles produced by this novel synthetic route were investigated using small-angle X-ray scattering, transmission electron microscopy, X-ray diffraction, and X-ray spectroscopy. The nanoparticles were in a size range of 4–16 nm, show high sphericity, no oxidation, and no agglomeration after synthesis.

Formation of Graphite Encapsulated Nickel Nanoparticles by Ball Milling and Annealing of Expanded Graphite with Nickel

2011 ◽  
Vol 80-81 ◽  
pp. 217-220 ◽  
Author(s):  
Xue Qing Yue ◽  
Hai Jun Fu ◽  
Da Jun Li
Keyword(s):  
Electron Microscope ◽  
Ball Milling ◽  
Transmission Electron Microscope ◽  
Nickel Nanoparticles ◽  
Size Range ◽  
Expanded Graphite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nickel Powders ◽  
Transmission Electron

Graphite encapsulated nickel nanoparticles were prepared by ball milling andsubsequently annealing a mixture of expanded graphite with nickel powders. The products were characterized by transmission electron microscope and X-ray diffraction. The formation mechanism of the products was discussed. Results show that the products have a size range of 20-150 nm. The graphite and nickel in the products all exhibit a high crystallinity.

Calculation of the radiation dose absorbed by human biological tissue when using imaging equipment in radiоtherapy

2021 ◽  
pp. 56-59
Author(s):  
Irina M. Lebedenko ◽  
Sergej S. Khromov ◽  
Taras V. Bondarenko ◽  
Evgenij M. Chertenkov
Keyword(s):  
Monte Carlo ◽  
Radiation Therapy ◽  
Biological Tissue ◽  
Electron Accelerator ◽  
Absorbed Dose ◽  
Tube Voltage ◽  
X Ray ◽  
The Monte Carlo Method ◽  
Therapeutic Procedures ◽  
Dose Control

Considered the issues of X-ray dose control during diagnostic and therapeutic procedures using imaging tools. The dose of X-ray radiation from the visualization devices absorbed by the biological tissue of a person was determined when monitoring the position of the patient on the therapeutic table of the electron accelerator before the radiation therapy session. The processes of transmission of photons and electrons through the medium were simulated, and the X-ray spectra were measured. The emission spectrum of the Varian G-242 Rotating Anode X-ray Tube was obtained using an XR-100-CdTe spectrometer. The absorbed dose is calculated by the Monte Carlo method. The absorbed dose in the water phantom at tube voltage up to 80 kV was 0,9–1,5 mGy.

scholarly journals COMPUTER SIMULATION OF X-RAY DIFFRACTION PROFILES AND TEM DIFFRACTION PATTERNS ON ORDERING FOR Cu-4wt%Ti ALLOY

2000 ◽  
Vol 49 (5) ◽  
pp. 926
Author(s):  
WANG LIU-DING ◽  
CHEN CHANG-LE ◽  
LIU LIN ◽  
KANG MO-KUANG ◽  
JI BANG-JIE ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Ti Alloy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Patterns
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