| Téléchargement | - Voir la version finale : Spontaneous formation of boron nitride nanotube fibers by boron impurity reduction in laser ablation of ammonia borane (PDF, 1.8 Mio)
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| DOI | Trouver le DOI : https://doi.org/10.1186/s40580-022-00312-y |
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| Auteur | Rechercher : Bae, Dong Su; Rechercher : Kim, Chunghun; Rechercher : Lee, Hunsu; Rechercher : Khater, Omar; Rechercher : Kim, Keun Su1; Rechercher : Shin, Homin1; Rechercher : Lee, Kun-Hong; Rechercher : Kim, Myung JongIdentifiant ORCID : https://orcid.org/0000-0002-7484-3081 |
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| Affiliation | - Conseil national de recherches Canada. Technologies de sécurité et de rupture
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| Bailleur de fonds | Rechercher : Korea Institute of Science and Technology; Rechercher : Ministry of Trade, Industry and Energy; Rechercher : National Research Foundation of Korea; Rechercher : Korea Research Institute for defense Technology planning and advancement |
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| Format | Texte, Article |
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| Sujet | boron nitride nanotubes; laser ablation; ammonia borane; homogenous nucleation; spontaneous fiber formation; pressure effect |
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| Résumé | 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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| Date de publication | 2022-12 |
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| Maison d’édition | Springer Nature |
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| Licence | |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Identificateur | 312 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 66811311-fb1b-47ef-b30b-2fde7ed687bc |
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| Enregistrement créé | 2024-03-19 |
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| Enregistrement modifié | 2024-03-19 |
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