| Download | - View final version: Spontaneous formation of boron nitride nanotube fibers by boron impurity reduction in laser ablation of ammonia borane (PDF, 1.8 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1186/s40580-022-00312-y |
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| Author | Search for: Bae, Dong Su; Search for: Kim, Chunghun; Search for: Lee, Hunsu; Search for: Khater, Omar; Search for: Kim, Keun Su1; Search for: Shin, Homin1; Search for: Lee, Kun-Hong; Search for: Kim, Myung JongORCID identifier: https://orcid.org/0000-0002-7484-3081 |
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| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
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| Funder | Search for: Korea Institute of Science and Technology; Search for: Ministry of Trade, Industry and Energy; Search for: National Research Foundation of Korea; Search for: Korea Research Institute for defense Technology planning and advancement |
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| Format | Text, Article |
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| Subject | boron nitride nanotubes; laser ablation; ammonia borane; homogenous nucleation; spontaneous fiber formation; pressure effect |
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| Abstract | Highly crystalline and few-walled boron nitride nanotubes (BNNTs) had been synthesized by laser ablation using only ammonia borane as a precursor. As a molecular precursor, ammonia borane supplied both B and N atoms with a ratio of 1:1, and BNNTs were formed via the homogeneous nucleation of BN radicals, not the growth from boron nano-droplets, which is a generally accepted growth mechanism of the laser-grown BNNTs. Owing to the absence of amorphous boron impurities, the van der Waals interaction among BNNTs became effective and thus a BNNT fibers was formed spontaneously during the BNNT synthesis. The BNNT growth and the subsequent fiber formation are found to occur only at high pressures of a surrounding gas. The mechanism behind the critical role of pressure was elucidated from the perspective of reaction kinetics and thermal fluid behaviors. A polarized Raman study confirmed that the BNNT fiber formed exhibits a good alignment of BNNTs, which implies great potential for continuous production of high-quality BNNT fibers for various applications. |
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| Publication date | 2022-12 |
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| Publisher | Springer Nature |
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Identifier | 312 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 66811311-fb1b-47ef-b30b-2fde7ed687bc |
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| Record created | 2024-03-19 |
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| Record modified | 2024-03-19 |
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