Impact of silicon nanocrystal oxidation on the nonmetallic growth of carbon nanotubes
Rocks, Conor and Mitra, Somak and Macias-Montero, Manuel and Maguire, Paul and Svrcek, Vladimir and Levchenko, Igor and Ostrikov, Kostya and Mariotti, Davide (2016) Impact of silicon nanocrystal oxidation on the nonmetallic growth of carbon nanotubes. ACS Applied Materials and Interfaces, 8 (29). pp. 19012-19023. ISSN 1944-8252 (https://doi.org/10.1021/acsami.6b02599)
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Abstract
Carbon nanotube (CNT) growth has been demonstrated recently using a number of nonmetallic semiconducting and metal oxide nanoparticles, opening up pathways for direct CNT synthesis from a number of more desirable templates without the need for metallic catalysts. However, CNT growth mechanisms using these nonconventional catalysts has been shown to largely differ and reamins a challenging synthesis route. In this contribution we show CNT growth from partially oxidized silicon nanocrystals (Si NCs) that exhibit quantum confinement effects using a microwave plasma enhanced chemical vapor deposition (PECVD) method. On the basis of solvent and a postsynthesis frgamentation process, we show that oxidation of our Si NCs can be easily controlled. We determine experimentally and explain with theoretical simulations that the Si NCs morphology together with a necessary shell oxide of ∼1 nm is vital to allow for the nonmetallic growth of CNTs. On the basis of chemical analysis post-CNT-growth, we give insight into possible mechanisms for CNT nucleation and growth from our partially oxidized Si NCs. This contribution is of significant importance to the improvement of nonmetallic catalysts for CNT growth and the development of Si NC/CNT interfaces.
ORCID iDs
Rocks, Conor, Mitra, Somak, Macias-Montero, Manuel, Maguire, Paul, Svrcek, Vladimir, Levchenko, Igor, Ostrikov, Kostya and Mariotti, Davide ORCID: https://orcid.org/0000-0003-1504-4383;-
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Item type: Article ID code: 90262 Dates: DateEvent27 July 2016Published30 June 2016Published Online30 June 2016AcceptedSubjects: Science > Physics Department: Faculty of Engineering > Design, Manufacture and Engineering Management Depositing user: Pure Administrator Date deposited: 15 Aug 2024 10:46 Last modified: 24 Sep 2024 22:50 URI: https://strathprints.strath.ac.uk/id/eprint/90262