...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >High-pressure Raman response of single-walled carbon nanotubes: Effect of the excitation laser energy
【24h】

High-pressure Raman response of single-walled carbon nanotubes: Effect of the excitation laser energy

机译：单壁碳纳米管的高压拉曼响应：激发激光能量的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We report high-pressure Raman experiments on the tangential vibrational modes of CarboLex bundled single-walled carbon nanotubes up to 6.5 GPa using two different excitation energies: 1.96 and 2.41 eV. We show through the curve-fitting technique, together with the modified interband transition energies versus diameter plot, how the nature of the resonant tubes is modified under the excitation energy, in particular under the 1.96 eV excitation. Having metallic and semiconducting tubes in resonance at ambient pressure, we find that only semiconducting tubes are in resonance at 3.5 GPa. We associate this loss of resonance from the metallic tubes to a redshift pressure response of the first (E_(11)) transition energies from these tubes. Added to that, the change in the excitation energies leads to a change in the value of the transition pressure. This is simply associated with the fact of having different diameters in resonance under each excitation from the same sample.
机译：我们报告了使用两种不同的激发能（1.96和2.41 eV）对CarboLex捆绑的单壁碳纳米管（最高6.5 GPa）的切向振动模式进行的高压拉曼实验。我们通过曲线拟合技术，以及修改后的带间跃迁能量与直径的关系图，展示了如何在激励能量下，特别是在1.96 eV激励下，改变谐振管的特性。当金属和半导体管在环境压力下共振时，我们发现只有半导体管在3.5 GPa时共振。我们将金属管的共振损失与这些管的第一（E_（11））跃迁能量的红移压力响应相关联。除此之外，激发能的变化导致过渡压力值的变化。这与以下事实简单相关：在来自相同样品的每次激发下，共振的直径不同。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号