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Modifying the morphology and properties of aligned CNT foams through secondary CNT growth

机译：通过二级CNT生长来改变对齐的CNT泡沫的形态和性质

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摘要

In this work, we report for the first time, growth of secondary carbon nanotubes (CNTs) throughout a three-dimensional assembly of CNTs. The assembly of nanotubes was in the form of aligned CNT/carbon (ACNT/C) foams. These low-density CNT foams were conformally coated with an alumina buffer layer using atomic layer deposition. Chemical vapor deposition was further used to grow new CNTs. The CNT foam's extremely high porosity allowed for growth of secondary CNTs inside the bulk of the foams. Due to the heavy growth of new nanotubes, density of the foams increased more than 2.5 times. Secondary nanotubes had the same graphitic quality as the primary CNTs. Microscopy and chemical analysis revealed that the thickness of the buffer layer affected the diameter, nucleation density as well as growth uniformity across the thickness of the foams. The effects of secondary nanotubes on the compressive mechanical properties of the foams was also investigated.
机译：在这项工作中，我们首次报告，在CNT的三维组装中首次报告二次碳纳米管（CNT）。 纳米管的组装是对齐的CNT /碳（ACNT / C）泡沫的形式。 使用原子层沉积与氧化铝缓冲层共形地涂覆这些低密度CNT泡沫。 化学气相沉积还用于生长新的CNT。 CNT泡沫的极高孔隙率允许在大部分泡沫中生长次级CNT。 由于新纳米管的沉重增长，泡沫密度增加了2.5倍以上。 次级纳米管具有与初级CNT相同的石墨质量。 显微镜和化学分析表明，缓冲层的厚度影响了泡沫厚度的直径，成核密度以及生长均匀性。 还研究了次要纳米管对泡沫的压缩力学性能的影响。

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  • 来源
    《Nanotechnology》 |2018年第29期|共10页
  • 作者

    Faraji Shaghayegh; Stano Kelly; Akyildiz Halil; Yildiz Ozkan; Jur Jesse S.; Bradford Philip D.;

  • 作者单位

    North Carolina State Univ Dept Text Engn Chem &

    Sci Campus Box 8301 Raleigh NC 27695 USA;

    North Carolina State Univ Dept Text Engn Chem &

    Sci Campus Box 8301 Raleigh NC 27695 USA;

    North Carolina State Univ Dept Text Engn Chem &

    Sci Campus Box 8301 Raleigh NC 27695 USA;

    North Carolina State Univ Dept Text Engn Chem &

    Sci Campus Box 8301 Raleigh NC 27695 USA;

    North Carolina State Univ Dept Text Engn Chem &

    Sci Campus Box 8301 Raleigh NC 27695 USA;

    North Carolina State Univ Dept Text Engn Chem &

    Sci Campus Box 8301 Raleigh NC 27695 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    carbon nanotube; foam; synthesis; low density material;

    机译：碳纳米管;泡沫;合成;低密度材料;

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