期刊
CARBON TRENDS
卷 8, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.cartre.2022.100179
关键词
Carbon nanotubes; Iron carbide; Buckypapers; Single wall; Multiwall; chlorine
资金
- National Natural Science foundation (NSFC) of China [11950410752]
- Fundamental Research Funds for the Central Universities [2021SCU12116]
- China Postdoctoral Science Foundation [2021M702323]
- International Postdoctoral Exchange Fellowship Program (Talent-Introduction Program) [YJ20210289]
This study reports on the experimental growth parameters necessary for the nucleation and growth of flexible Fe3C-filled-CNT buckypapers at very low concentrations of dichlorobenzene. Two active growth regions were identified, allowing for the simultaneous nucleation and growth of ferromagnetically-filled buckypapers. The simultaneous growth of the two types of buckypapers within the same reactor is attributed to the dynamics of dichlorobenzene pyrolysis.
Fe3C filled carbon nanotubes (CNTs) self-organized into flexible-film-morphologies (buckypapers) have been proposed for numerous applications, these include flexible data-storage-devices, exchange-bias, spin-based-systems, flexible ferromagnetic-electrodes and others. However, despite the important progress, the significant concentration of Cl-containing-hydrocarbons which is needed for the buckypaper-growth (i.e. 1 to 10 ml) represents still an important challenge for industrial-production. Here we report the experimental-growth-parameters needed for the nucleation and growth of flexible Fe3C-filled-CNT buckypapers, under very-low-concentrations of dichlorobenzene, as low as 0.05 ml. By carefully estimating both the heating- and cooling-rate parameters of the chosen chemical-vapor-deposition (CVD) reactor, we demonstrate the identification of two active-growth-regions which allow for the simultaneous nucleation and growth of ferromagnetically-filled buckypapers. The obtained films comprise of selectively grown single-wall (active-region-1) and multiwall (active-region-2) CNTs. The simultaneous growth of the two types of buckypapers within the same reactor is discussed and attributed to the dynamics of dichlorobenzene-pyrolysis, which appears to yield a higher concentration of Cl-radicals in the active-region-1. In the buckypapers grown in the latter (active-region-1) we highlight an unusual separation between the first (inner) and second CNT-cylinders, with the HRTEM analyses revealing an anomalously-large interlayer-distance varying from similar to 1.6 to similar to 6.6 nm (an effective void between two CNT-cylinders). (c) 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据