scholarly journals Single-Crystal MgO Hollow Nanospheres Formed in RF Impulse Discharge Plasmas

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Satoru Iizuka ◽  
Takumasa Muraoka
Keyword(s):  
Radio Frequency ◽  
Single Crystal ◽  
Formation Mechanism ◽  
Hollow Nanospheres ◽  
Mgo Nanoparticles ◽  
Impulse Discharge ◽  
Discharge Plasmas ◽  
Cooling Model

Spherical MgO nanoparticles with a hollow inside, that is, MgO hollow nanospheres, were created in Ar/O2plasma produced by radio frequency (RF) impulse discharge using a Mg rod electrode. The hollow nanospheres were found on the SiO2plates placed near the powered Mg electrode. The electron refraction pattern showed that each nanosphere was made of a single crystal of MgO. Since the shape was spherical, these nanoparticles seemed to be created during the levitation in the plasma without touching any walls. The formation mechanism with a quasiliquid cooling model was also discussed.

Investigation of Interatomic Potential on Chip Formation Mechanism in Nanometric Cutting Using MD Simulation

2011 ◽  
Vol 312-315 ◽  
pp. 983-988
Author(s):  
Seyed Vahid Hosseini ◽  
Mehrdad Vahdati ◽  
Ali Shokuhfar
Keyword(s):  
Single Crystal ◽  
Formation Mechanism ◽  
Chip Formation ◽  
Morse Potential ◽  
Md Simulation ◽  
Atomic Displacement ◽  
Cutting Process ◽  
Machining Process ◽  
Chip Formation Mechanism ◽  
Eam Potential

Nowadays, the nano-machining process is used to produce high quality finished surfaces with precise form accuracy. To understand and analyze the chip formation mechanism of nano-machining process on an atomistic scale, since the experimentation is not an easy task, numerical simulation such as molecular dynamic (MD) simulation is a very useful method. In this paper, MD simulation of the nano-metric cutting of single-crystal copper was performed with a single crystal diamond tool. The model was solved with both pair wise Morse potential function and embedded atom method (EAM) potential to simulate the inter-atomic force between the work-piece and a rigid tool. The chip formation mechanism, dislocation generation, tool forces and generated temperature were investigated. Results show that the Morse potential cannot perform an appropriate defect formation and plastic deformation in nano-metric cutting of metals. Also, tool forces in Morse potential are more than the forces in EAM potential. Furthermore, the fluctuations of resultant forces in Morse potential are greater than that of EAM. In addition, using many-body interaction potentials like EAM can lead to substantial changes in surface energies, elastic-plastic properties and atomic displacement, compared with the pair-wise potentials like Morse. Finally, the atomic displacement investigation shows that in EAM potential study, only the atoms in a local region near the cutting process are displaced, but in Morse potential a large portion of atoms has affected during cutting process. Subsequently, the chip temperature in EAM potential is more than that of Morse potential.

Single‐Crystal Multilayer Nitride, Metal, and Oxide Structures on Engineered Silicon for New‐Generation Radio Frequency Filter Applications

2020 ◽  
Vol 217 (7) ◽  
pp. 1900813 ◽  
Author(s):  
Rytis Dargis ◽  
Andrew Clark ◽  
Azadeh Ansari ◽  
Zhijian Hao ◽  
Mingyo Park ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Single Crystal ◽  
Frequency Filter ◽  
New Generation

scholarly journals Fabrication of high-quality single-crystal Cu thin films using radio-frequency sputtering

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Seunghun Lee ◽  
Ji Young Kim ◽  
Tae-Woo Lee ◽  
Won-Kyung Kim ◽  
Bum-Su Kim ◽  
...  
Keyword(s):  
Thin Films ◽  
Radio Frequency ◽  
Single Crystal ◽  
High Quality ◽  
High Quality Single Crystal ◽  
Radio Frequency Sputtering

Controllable synthesis and formation mechanism of single-crystal β-Co(OH)2 microrings as sensors for detection of nitrite ions

2017 ◽  
Vol 193 ◽  
pp. 371-379 ◽  
Author(s):  
Cui Tingting ◽  
Yanting Zhao ◽  
Yao Qian ◽  
Yali Shao ◽  
Mengting Fan ◽  
...  
Keyword(s):  
Single Crystal ◽  
Formation Mechanism ◽  
Controllable Synthesis

The hydrothermal synthesis and formation mechanism of single-crystalline perovskite BiFeO3 microplates with dominant (012) facets

CrystEngComm ◽  
2014 ◽  
Vol 16 (20) ◽  
pp. 4176-4182 ◽  
Author(s):  
Xin Yang ◽  
Gang Xu ◽  
Zhaohui Ren ◽  
Xiao Wei ◽  
Chunying Chao ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Single Crystal ◽  
Hydrothermal Method ◽  
Formation Mechanism ◽  
Organic Ligands ◽  
Adsorption Behaviour ◽  
One Pot ◽  
Single Crystalline

Single-crystal BiFeO3 (BFO) microplates with dominant (012) facets were successfully synthesized by a facile one-pot hydrothermal method. The adsorption behaviour of the organic ligands may play a key role in the formation of the BFO microplates.

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