Optical characterization of DNA-wrapped carbon nanotube hybrids

被引：114
作者：
Chou, SG
Ribeiro, HB
Barros, EB
Santos, AP
Nezich, D
Samsonidze, GG
Fantini, C
Pimenta, MA
Jorio, A
Plentz, F
Dresselhaus, MS
Dresselhaus, G
Saito, R
Zheng, M
Onoa, GB
Semke, ED
Swan, AK
Ünlü, MS
Goldberg, BB
机构：
[1] MIT, Dept Chem, Cambridge, MA 02139 USA
[2] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil
[3] Univ Fed Ceara, Dept Fis, BR-60455760 Fortaleza, Ceara, Brazil
[4] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
[5] CNEN, CDTN, Ctr Desenvolvimento Tecnol Nucl, BR-30123970 Belo Horizonte, MG, Brazil
[6] MIT, Dept Phys, Cambridge, MA 02139 USA
[7] MIT, Francis Bitter Magnet Lab, Cambridge, MA 02139 USA
[8] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
[9] CREST JST, Sendai, Miyagi 9808578, Japan
[10] DuPont Cent Res & Dev, Expt Stn, Wilmington, DE 19880 USA
[11] Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA
[12] Boston Univ, Dept Phys, Boston, MA 02215 USA
来源：
CHEMICAL PHYSICS LETTERS | 2004年 / 397卷 / 4-6期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/j.cplett.2004.08.117
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Optical characterization of DNA-wrapped CoMoCAT carbon nanotube hybrids (DNA-CNT) and semiconductor-enriched DNA-CNT was carried out using resonant Raman spectroscopy (RRS) and photoluminescence (PL) experiments. The values of radial breathing modes frequency omega(RBM) were found to be relatively insensitive to the type of wrapping agents surrounding the nanotube. The values of omega(RBM) and the first and second resonant interband transitions, E-11 and E-22, for a particular (n, m) tube for all sample types in RRS and PL measurements are found to correspond to the values obtained for SDS-dispersed nanotubes measured with PL, but with a shift in E-ii ranging from 10 to 80 meV. The DNA-wrapping has shown not only to provide good isolation to the individual nanotube in a bundle, but the DNA wrapping mechanism for the CoMoCAT sample has also been shown to be diameter selective. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：296 / 301
页数：6
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