Selective optical property modification of double-walled carbon nanotubes by fluorination
Selective optical property modification of double-walled carbon nanotubes by fluorination
复制标题
DOI：
10.1021/nn700391w
复制
发表时间：
2008-03-01
期刊：
影响因子：
17.1
通讯作者：
Endo, Morinobu
中科院分区：
文献类型：
--
作者：
Hayashi, Takuya;Shimamoto, Daisuke;Endo, Morinobu
我们发现，通过双壁碳纳米管（DWNTs），它是可能的抑制只有拉曼径向呼吸模式和吸收峰从外部（大直径）管的DWNTs。相比之下，来自内壳的拉曼信号显示与原始DWNT没有差异。从光致发光（PL）图和光吸收光谱也证实了氟化DWNTs内壳的稳定性，其仅显示来自DWNTs内壳的信号，氟化后内管的光学性质没有明显变化。我们的结果表明，一旦氟化，内管和外氟化管之间只存在较弱（如果不是没有）的相互作用，这证明氟化可以用于抑制碳纳米管的光学性质，而不会干扰内管的性质。本发明的发现在电子和传感器应用中可能是重要的，从而防止内管与可能分散内管自身特性的其他物质发生不必要的接触。
We found that by fluorination of double-walled carbon nanotubes (DWNTs), it is possible to suppress only the Raman radial breathing mode and absorption peaks from the outer (large diameter) tubes of DWNTs. In contrast, Raman signals from the inner shells showed no difference from the pristine DWNTs. The stability of the inner shells of fluorinated DWNTs was also confirmed from the photoluminescence (PL) map and the optical absorption spectra, which only showed the signals from the inner shells of DWNTs, with no distinct change in the optical properties of the inner tubes after fluorination. Our results indicate that once fluorinated, there exists only a weak, if not none, interaction between the inner tube and the outer fluorinated tube, proving that fluorination can be used to suppress the optical properties of carbon nanotubes without interfering the properties of inner tubes. The present finding can be important in electronic and sensor applications, keeping the inner tube from having unwanted contact with other substances that may distract from the inner tube's own characteristics.