Length-dependent optical effects in single-wall carbon nanotubes

被引：125

作者：

Fagan, Jeffrey A. ^{[1
]}

Simpson, Jeffrey R. ^{[1
]}

Bauer, Barry J. ^{[1
]}

Lacerda, Silvia H. De Paoli ^{[1
]}

Becker, Matthew L. ^{[1
]}

Chun, Jaehun ^{[1
]}

Migler, Kalman B. ^{[1
]}

Walker, Angela R. Hight ^{[1
]}

Hobbie, Erik K. ^{[1
]}

机构：

[1] NIST, Gaithersburg, MD 20899 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2007年 / 129卷 / 34期

关键词：

D O I：

10.1021/ja073115c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Among the novel chemical and physical attributes of single-wall carbon nanotubes (SWCNTs), the optical properties are perhaps the most compelling. Although much is known about how such characteristics depend on nanotube chirality and diameter, relatively little is known about how the optical response depends on length, the next most obvious and fundamental nanotube trait. We show here that the intrinsic optical response of single-wall carbon nanotubes exhibits a strong dependence on nanotube length, and we offer a simple explanation that relates this behavior to the localization of a bound exciton along the length of a nanotube. The results presented here suggest that, for a given volume fraction, the longest nanotubes display significantly enhanced absorption, near-infrared fluorescence, and Raman scattering, which has important practical implications for potential applications that seek to exploit the unique optical characteristics of SWCNTs.

引用

页码：10607 / 10612

页数：6

共 23 条

[1] Third and fourth optical transitions in semiconducting carbon nanotubes [J].