연도 2016 
저널명 Science of Advanced Materials 
 

Plasma technology is being studied and utilized in various medical fields, which requires increased ablation rate and decreased erosion rate of the metal electrode. The purpose of this experiment is to investigate the durability and the decomposition efficacy change in the catheter tips made of molybdenum metal. Metal particle size and amount in saline medium after plasma discharge were measured by electrophoretic light scattering photometry (ELS), and the tip metal surface after discharge was observed by field emission scanning electron microscopy (FESEM) and by the chemical reaction for component change. The mass defect in the tip and the decomposition rate of porcine disc by discharge time were measured by using the electric scale with a resolution of 50 g. The surface structure change on FESEM showed that the molybdenum tip was more intact than the stainless steel tip, and the surface components included Molybdenum 96.4 wt.%, Na 0.41 wt.%, and Cl 0.23 wt.%. The average size of the particles was 300±35 nm. At high level of electric power, the erosion rate of the molybdenum tip was about 1 ug/s. The erosion rate of the molybdenum catheter was 1×10−13 kg per pulse, and the durability of the catheter tip was similar to that of the tungsten tip. Furthermore, we could generate plasma over 300 at the high voltage level with the molybdenum catheter. This means that the molybdenum catheter can effectively remove more tissue.


https://doi.org/10.1166/sam.2016.2927

연도 저널명 제목 조회 수
2024  Current Applied Physics  Observation of the floating sheath distribution on Al2O3 and silicon targets adjacent to a DC biased metal substrate 73
2022  Current Applied Physics  Investigation of ion-induced etch damages on trench surface of Ge2Sb2Te5 in high density Ar/SF6 plasma 269
2021  Journal of the Korean Physical Society  Phenomenology-based Model Predictive Control of Electron Density in Ar/SF6 Capacitively Coupled Etch Plasma 321
2022  Plasma Sources Science and Technology  Investigation of ion collision effect on electrostatic sheath formation in weakly ionized and weakly collisional plasma file 401
2022  Journal of Alloys and Compounds  Competitive roles of dislocations on blister formation in polycrystalline pure tungsten file 440
2021  Current Applied Physics  Development of Model Predictive Control of Fluorine Density in SF6/O2/Ar Etch Plasma by Oxygen Flow Rate 441
2019  IAEA CRP report  Evaluation of tritium inventory in irradiated tungsten by atomic-scale modeling 601
2019  Current Applied Physics  Characteristics of a plasma information variable in phenomenology-based, statistically-tuned virtual metrology to predict silicon dioxide etching depth 628
2021  Atoms  Population Kinetics Modeling of Low-Temperature Argon Plasma 653
2022  Journal of the Korean Physical Society  Plasma Information-based virtual metrology (PI-VM) and mass production process control file 682
2021  반도체디스플레이기술학회지  VHF-CCP 설비에서 Ar/SF6 플라즈마 분포가 Si 식각 균일도에 미치는 영향 분석 806
2022  Physics of Plasma  2022 Review of Data-Driven Plasma Science file 811
2015  Journal of Nuclear Materials  Investigation of SOL plasma interaction with graphite PFC 865
2014  Journal of Nuclear Materials  Investigation of SOL plasma interaction with graphite PFC 902
2015  Fusion Science and Technology  Laser-Assisted Ha Spectroscopy for Measurement of Negative Ion Density in A Hydrogen Plasma 935

Archives


XE Login