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The Optical Properties of Single-Walled Carbon Nanotubes in the Ultraviolet Region

机译:紫外区单壁碳纳米管的光学性质

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Received July 22, 2009; revised August 24, 2009; accepted August 24, 2009; published online February 22, 2010rnThe absorption properties of single-walled nanotubes in the ultraviolet (UV) region have been studied using a generalized tight-binding approximation. Calculations indicate that the absorption spectrum in the UV region strongly depends not only on nanotube diameter but also on chiral index. We found a substantial diameter dependence of the UV absorption peaks of the nanotubes with chiral indices of (even, even) and (odd, even). The nanotubes with chiral indices of (even, odd) and (odd, odd) exhibit weak diameter dependence. These spectral features are characteristic of inter-band transitions near the M point of the hexagonal Brillouin zone of graphene.
机译:2009年7月22日收到;于2009年8月24日修订; 2009年8月24日接受; 2010年2月22日在线发表rn已经使用广义紧密结合近似研究了单壁纳米管在紫外线(UV)区域的吸收特性。计算表明,UV区的吸收光谱不仅强烈取决于纳米管直径,而且还取决于手性指数。我们发现,手性指数为(偶数,偶数)和(奇数,偶数)的纳米管的UV吸收峰在很大程度上取决于直径。手性指数为(偶数,奇数)和(奇数,奇数)的纳米管显示出较弱的直径依赖性。这些光谱特征是石墨烯六边形布里渊区的M点附近的带间跃迁的特征。

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  • 来源
    《Japanese journal of applied physics》 |2010年第2issue2期|p.02BB01.1-02BB01.4|共4页
  • 作者

    Yoshiteru Takagi; Susumu Okada;

  • 作者单位

    Graduate School of Pure and Applied Sciences and Center for Computational Sciences, University of Tsukuba,Tsukuba, Ibaraki 305-8571, Japan CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan;

    Graduate School of Pure and Applied Sciences and Center for Computational Sciences, University of Tsukuba,Tsukuba, Ibaraki 305-8571, Japan CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan;

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