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首页> 外文期刊>Physical review >Induced electro-optic effects in single-walled carbon nanotubes. Ⅰ. Polarizability of metallic nanotubes
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Induced electro-optic effects in single-walled carbon nanotubes. Ⅰ. Polarizability of metallic nanotubes

机译：单壁碳纳米管中的感应电光效应。 Ⅰ。金属纳米管的极化率

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摘要

The polarizability of single-walled carbon nanotubes (SWNTs) results in an induced dipole moment which in turn allows their alignment, when in suspension, in an applied electric field. The consequent introduction of anisotropy into what was a previously isotropic suspension of SWNTs gives rise to induced optical effects such as birefringence and linear dichroism. In this paper the induced linear dichroism is studied by application of a pulsed electric field. The results demonstrate that the effect is due to metallic SWNTs whose polarizability is found to be in close agreement with the classical result predicted for metallic cylinders. Electric-field-induced birefringence has been the subject of previous studies and it is frequently the case that linear dichroism interferes with measurements of birefringence, both producing similar effects. The induced linear dichroism and birefringence of SWNTs are compared here, and it is demonstrated that the linear dichroism has minimal influence on the measurement of birefringence in SWNTs.
机译：单壁碳纳米管（SWNT）的可极化性会导致感应的偶极矩，从而使它们在悬浮状态下在施加的电场中对齐。因此，各向异性被引入到以前的各向同性的单壁碳纳米管悬浮液中，引起了诸如双折射和线性二向色性的诱导光学效应。在本文中，通过施加脉冲电场来研究诱导的线性二向色性。结果表明，这种影响是由于金属单壁碳纳米管的极化率与金属圆柱体的经典预测结果非常吻合。电场引起的双折射一直是先前研究的主题，线性二色性经常干扰双折射的测量，两者均产生相似的效果。在此比较了SWNTs引起的线性二向色性和双折射，证明了线性二向色性对SWNTs中双折射的测量影响最小。

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  • 来源
    《Physical review》 |2011年第15期|p.155414.1-155414.6|共6页
  • 作者

    T. J. Robb-Smith; K. J. Donovan; K. Scott; M. Somerton;

  • 作者单位

    Physics Department, Queen Mary, University of London, Mile End Road, London El 4NS, United Kingdom;

    Physics Department, Queen Mary, University of London, Mile End Road, London El 4NS, United Kingdom;

    Physics Department, Queen Mary, University of London, Mile End Road, London El 4NS, United Kingdom;

    Physics Department, Queen Mary, University of London, Mile End Road, London El 4NS, United Kingdom;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    nanotubes; molecular dynamics; brownian dynamics; continuum mechanics;

    机译：纳米管;分子动力学;布朗动力学;连续力学;

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