| 1. |
Yasuhiro Sakai, Daiji Kato, Takahiro Kenmotsu, Keisuke Nogami, KENJI FURUYA, S. Mineta, I. Murakami, Kenji Motohashi, Hiroyuki Sakaue, Light emission from sputtered or backscattered atoms on tungsten surfaces by ion bombardment, 24th International Toki Conference (ITC-24) on Expanding Horizons of Plasma and Fusion Science through Cross-Fertilization, 2014.11. |
| 2. |
Takayasu Aso, KENJI FURUYA, Akira Harata, STUDY OF ANTHRACENE ON WATER SURFACE BY QUANTUM CHEMISTRY TECHNIQUE, Cross Straits Symposium on Materials, Energy and Environmental Sciences, 2013.11. |
| 3. |
KENJI FURUYA, YOSHIKO KOBAYASHI, YUSUKE HORI, Tetsuya Kida, Koyo Norinaga, Development of high intensity 7Li+ beam under low vacuum condition and its application, Symposium on Chemical Kinetics and Dynamics, 2013.06, [Introduction]
Li+ attachment to neutral molecules is known as a fragment-free ionization method and used for mass spectrometry.1 This ionization method generally needs the stabilization of Li+ adducts through three-body collisions. Then, the attachment process must be carried out at a pressure of more than 1 Pa. We are planning to develop an equipment to carry out the following experiments using a beam of Li+ adducts:
1. Li+ transfer experiment
The reaction, A + BLi+ ALi+ + B (A and B: molecule or radical) is expected to occur under a high vacuum condition if the Li+ affinity of A is greater than that of B. This reaction would be useful for a fragment-free ionization method under the high vacuum condition, and such an alkali metal ion transfer could be related to the Na+/K+ pump in cell membranes in the future.
2. Production of radical beam
The successful detachment of Li+ from RLi+ (R: molecular radical) would make it possible to prepare a radical beam, which could be applied for various experiments.
To realize these experiments, we are developing a high intensity isotopically-controlled 7Li+ beam at first.
[Experiment]
Synthesis of -eucryptite from 7LiOH•H2O -eucryptite (Li2O•Al2O3•2SiO2) is a good source of Li+. 7LiOH•H2O of 99.9% 7Li enrichment is commercially available. We then synthesized 7Li-enriched -eucryptite from 7LiOH•H2O, Al2O3, and SiO2. The powder of these constituent compounds were mixed, put into an alumina combustion boat, and melted at 1100 C for 15 h followed by 1300 C for 24 h in vacuum. The product was mechanically ground. Its XRD spectrum agreed well with that of -eucryptite powder reported in the literature.
Li+ emitter preparation A tungsten wire 0.25 mm in diameter was coiled with five turns 2.5 mm in diameter, and the clay of the -eucryptite powder mixed with methanol was coated on the tungsten coil filament. An electrical current of 6.5 A was applied to the filament for a few minutes in vacuum to make the -eucryptite powder glassy.
[Results]
We successfully obtained the 7Li+ beam of more than 10 nA under high vacuum condition. It was stable for several hours. The design of an ion funnel suitable for obtaining a high current 7Li+ adduct beam under a low vacuum condition of 100 Pa is in progress.
[References]
1T. Fujii, Mass Spectrom. Rev. 19 (2000) 111.
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| 4. |
COLORIMETRIC SENSING OF PHOSPHATE ANION WITH SURFACE FUNCTIONALIZED GOLD NANOPARTICLES. |
| 5. |
CO2 EFFECTS TO THE SHAPE AND SIZE OF GOLD NANOPARTICLES OBTAINED USING GAS-LIQUID INTERFACE DISCHARGE. |
| 6. |
Searching reaction routes in the collisions between CF3+ and CO using the global reaction route mapping calculation method. |
| 7. |
Searching reaction routes using the Gaussian program. |
| 8. |
Correlation between deposited films and high-mass molecules observed in reactive plasmas. |
| 9. |
Effects of the deposition film to the growth of molecules in reactive plasmas. |
| 10. |
Development of decomposition process of cellulose in ionic liquid by gas-liquid interface discharge. |
| 11. |
Mass spectrometric investigation of large radicals produced in sperfluorocarbon plasmas and their formation mechanisms. |
| 12. |
Global reaction route mapping for dissociation of cations and ion-molecule reactions: ：CF3+とCF3+ + CO system. |
| 13. |
Decomposition of cellulose in ionic liquid by gas-liquid interface discharge. |
| 14. |
Decomposition of cellulose in ionic liquid by gas-liquid interface discharge. |
| 15. |
Mass spectrometric investigation of methane plasmas: Molecular growth on the surfaces and sputtering. |
| 16. |
Li+ ION ATTACHMENT MASS SPECTROMETRIC INVESTIGATION OF NEUTRAL SPECIES IN THE DOWNSTREAM REGION OF METHANE PLASMAS. |
| 17. |
Li+ ION ATTACHMENT MASS SPECTROMETRIC INVESTIGATION OF NEUTRAL SPECIES IN THE DOWNSTREAM REGION OF PLASMAS: COMPARISON BETWEEN He/CF4/H2 AND Ar/CF4/H2 PLASMAS. |
| 18. |
EFFECTS OF GAS ATMOSPHERE TO THE SHAPE AND SIZE OF GOLD NANOPARTICLES OBTAINED USING GAS-LIQUID INTERFACE DISCHARGE. |
| 19. |
Mass spectrometric analysis of chemical species in the downstream region of Ar/CF4/N2 plasmas. |
| 20. |
Synthesis of metal nanoparticles using gas-liquid interface discharge. |
| 21. |
CF3+ + CO collisional reaction experiment and its GRRM calculation. |
| 22. |
Direct Observation of high-mass neutral radicals in the downstream region of Ar/c-C4F8 plasmas. |
| 23. |
Mass spectrometric investigation of neutral species and positive ions in the downstream region of Ar/CF4/N2 plasmas. |
| 24. |
Mass spectrometric investigation of chemical species in the downstream region of Ar/CF4/N2 plasmas. |
| 25. |
Guided ion beam study and reaction mechanisms of CF3+ + CO. |
| 26. |
Growth of gaseous macromolecules downstream in perfluorocarbon plasmas and its application to thin film formation. |
