Fast accumulation of electron plasma in a Multi-Ring Trap (MRT) under ultra-high vacuum condition

2006 ◽  
Author(s):  
Mohamed Tarek ◽  
N. Oshima ◽  
A. Mohri ◽  
Y. Yamazaki
Keyword(s):  
High Vacuum ◽  
Electron Plasma ◽  
Vacuum Condition ◽  
Ultra High Vacuum ◽  
High Vacuum Condition ◽  
Ultra High Vacuum Condition ◽  
Ring Trap

Enhanced stability of organic light-emitting devices fabricated under ultra-high vacuum condition

2006 ◽  
Vol 426 (1-3) ◽  
pp. 111-114 ◽  
Author(s):  
Takeshi Ikeda ◽  
Hideyuki Murata ◽  
Yoshiki Kinoshita ◽  
Junichi Shike ◽  
Yoshikazu Ikeda ◽  
...  
Keyword(s):  
High Vacuum ◽  
Vacuum Condition ◽  
Ultra High Vacuum ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
High Vacuum Condition ◽  
Organic Light Emitting Devices ◽  
Ultra High Vacuum Condition ◽  
Enhanced Stability

Exoelectron emission from unexcited metallic glasses Fe78B13Si9 during heat treatment

1992 ◽  
Vol 7 (6) ◽  
pp. 1396-1399 ◽  
Author(s):  
Yoshihisa Watanabe ◽  
Tadayoshi Kubozoe ◽  
Yoshikazu Nakamura
Keyword(s):  
Heat Treatment ◽  
Metallic Glasses ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Exoelectron Emission ◽  
Radiation Chemical ◽  
Temperature Range ◽  
High Vacuum Condition ◽  
Before And After ◽  
Ultra High Vacuum Condition

Exoelectron emission from the surface of unexcited metallic glasses Fe78B13Si9 during heat treatment has been studied under ultra high vacuum condition. In the first heating cycle, exoelectrons are emitted from the as-cast ribbon in the temperature range from approximately 423 K to 773 K (150 °C to 500 °C), although the surface of the specimen is not excited by ionizing radiation, chemical processes, or mechanical treatments prior to measurements. In the second and subsequent heating cycles, however, there is no anomalous emission observed in the same temperature range. In order to elucidate the mechanism of emission, the surface of the specimen is observed by the atomic force microscope (AFM) before and after measurements. In the AFM image, many crystallites in the amorphous matrix can be found in the surface of the heated specimen. These experimental results show that exoelectrons are emitted in the same temperature range as the early stages of crystallization on the surface of metallic glasses. We hypothesize that the two effects are correlated.

The Effect of Different Oxidizing Atmospheres on the Initial Kinetics of Copper Oxidation as Studied In Situ UHV-TEM

1999 ◽  
Vol 589 ◽  
Author(s):  
Mridula D. Bharadwaj ◽  
Anu Gupta ◽  
J. Murray Gibson ◽  
Judith C. Yang
Keyword(s):  
Water Vapor ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Solid State Reactions ◽  
Copper Oxidation ◽  
High Vacuum Condition ◽  
Ultra High Vacuum Condition ◽  
Kinetics Of

AbstractEffect of moisture on the oxidation of copper was studied using in situ UHV-TEM. The ultra high vacuum condition is required for minimum contamination effects. The initial observations show that the water vapor reduces the oxide as well as reduces the rate of oxidation if both oxygen gas and water vapor are simultaneously used. Based on these observations, we have speculated on the role of moisture in the solid state reactions involved in copper oxidation

scholarly journals BaTiO3 FILMS DEPOSITED ONTO TiNb AND Ti SUBSTRATES - AMOUNT AND STABILITY OF BARIUM

2017 ◽  
Vol 8 ◽  
pp. 14-16
Author(s):  
Kamila Moriová ◽  
Zdeněk Tolde ◽  
Přemysl Vaněk ◽  
Vladimír Starý ◽  
Václav Nehasil
Keyword(s):  
High Vacuum ◽  
Synthesis Method ◽  
Ultra High Vacuum ◽  
Absolute Amount ◽  
Time Treatment ◽  
High Vacuum Condition ◽  
Long Time ◽  
Solution Saline ◽  
Ultra High Vacuum Condition

BaTiO<sub>3</sub> films deposited onto TiNb and Ti substrates using hydrothermal synthesis method were studied in the presented work. These films are supposed to improve properties of bone implants due to their ferroelectric behaviour, because ferroelectrics induce improved bone formation. A great question is the chemical stability of the used material. It can be crucial for its biocompatibility and possible in vivo application. We studied chemical composition of prepared samples, especially concentration of Ba and Ti and trends of these concentrations stimulated by a solution saline action. The Ba and Ti concentrations were determined by XPS under ultra - high vacuum condition. The BaTiO<sub>3</sub> films were investigated as received after the preparation procedure as well as after a long - time treatment in solution saline. Every sample was introduced to the solution saline at first for 1 and later for 3 weeks. Ti concentration almost does not change during our experiments while a meaningful Ba decrease is observed. Nevertheless, barium release seems to slow down with respect to the time of solution saline action. Stability of barium titanate films in a period of several months and an absolute amount of the released barium will be a subject of the next research.

In situ study of sensor behavior of MoS2 field effect transistor for methyl orange molecule in ultra high vacuum condition

2020 ◽  
Vol 32 (7) ◽  
pp. 075501
Author(s):  
Muhammad Shamim Al Mamun ◽  
Hiroki Waizumi ◽  
Tsuyoshi Takaoka ◽  
Md Iftekharul Alam ◽  
Yudai Tanaka ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistor ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
In Situ Study ◽  
High Vacuum Condition ◽  
Effect Transistor ◽  
Ultra High Vacuum Condition ◽  
Methyl Orange Molecule
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