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Exceptionally high Young's modulus observed for individual carbon nanotubes

机译:单个碳纳米管具有极高的杨氏模量

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摘要

Carbon nanotubes are predicted to have interesting mechanical properties-in particular, high stiffness and axial strength-as a result of their seamless cylindrical graphitic structure. Their mechanical properties have so far eluded direct measurement, however, because of the very small dimensions of nanotubes. Here we estimate the Young's modulus of isolated nanotubes by measuring, in the transmission electron microscope, the ampli-tude of their intrinsic thermal vibrations. We find that carbon nanotubes have exceptionally high Young's moduli, in the ter-apascal (TPa) range. Their high stiffness, coupled with their low density, implies that nanotubes might be useful as nanoscale fibres in strong, lightweight composite materials.
机译:碳纳米管由于其无缝的圆柱状石墨结构而具有令人感兴趣的机械性能,特别是高刚度和轴向强度。但是,由于纳米管的尺寸非常小,它们的机械性能至今仍无法直接测量。在这里,我们通过在透射电子显微镜中测量其固有热振动的幅度来估计孤立的纳米管的杨氏模量。我们发现碳纳米管具有非常高的杨氏模量,在帕斯卡(TPa)范围内。它们的高刚度加上低密度,意味着纳米管可能会在坚固,轻巧的复合材料中用作纳米级纤维。

著录项

  • 来源
    《Nature》 |1996年第6584期|p.678-680|共3页
  • 作者单位
  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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