| Project/Area Number |
23K04552
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 28030:Nanomaterials-related
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
陳 国海 国立研究開発法人産業技術総合研究所, 材料・化学領域, 主任研究員 (20805642)
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| Project Period (FY) |
2023-04-01 – 2026-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2025: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2024: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2023: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | carbon nanotube / microplasma / high crystallinity / data-driven |
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| Outline of Research at the Start |
Data-driven approach is used to elucidate key synthetic factors for structural control in nanomaterial synthesis, demonstrated by synthesizing high crystallinity long carbon nanotubes using multi-step microplasma-assisted gas phase synthesis to control the start/stop of catalyst nanoparticle growth.
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| Outline of Annual Research Achievements |
Data-driven research was conducted to explore important synthetic factors for achieving high crystallinity and yield in CNT synthesis using our current dataset. Simultaneously achieving these mutually exclusive properties in CNTs is a significant challenge, as it requires overcoming inherent trade-offs. A prediction model was established and subsequently validated experimentally. It revealed the surprising importance of the carbon feedstock, particularly its reactivity and concentration, as a means to overcome the trade-off. The results have been published in ACS Nano.
Experimentally, the size of catalyst particles and CNTs can be modulated by adjusting the residence time in plasma. A clear downshift of Raman RBM peaks was observed as increasing H2 concentration. Further study is ongoing.
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| Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
In this fiscal year, my focus has primarily been on the data-driven research aspect, specifically the exploratory data analysis of our current dataset, a central component of my research plan. This analysis aims to deeply understand the key synthetic factors from among many, to guide further experimentation. As a result, I have published an article as the corresponding author in a high-impact factor journal (ACS Nano). Consequently, less effort has been devoted to the experimental part, leading to a slight delay in terms of the proposed research plan.
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| Strategy for Future Research Activity |
I plan to advance both theoretical and experimental aspects of my research, focusing on the most critical experiments and achievable goals. I will continue my data-driven research and aim to streamline experiments to rapidly gain insights, especially in controlling microplasma on catalyst nanoparticles and examining the effects of sheath gases and carbon mixing timing on CNT growth. I intend to develop protocols for systematically investigating how carbon mixing timing influences catalyst nanoparticle size, density, and activity, as well as CNT quality and yield. My approach will be iterative, using data from ongoing experiments to continuously improve the model. This strategy is designed to maximize the efficiency and impact of my research, keeping it on track towards its final goals.
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