Spectroscopic and SEM studies of SWNTs: Polymer solutions and films

被引：32
作者：
Karachevtsev, VA
Glamazda, AY
Dettlaff-Weglikowska, U
Leontiev, VS
Mateichenko, PV
Roth, S
Rao, AM
机构：
[1] Natl Acad Sci Ukraine, Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
[2] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany
[3] Natl Acad Sci Ukraine, Inst Single Crystals, UA-61103 Kharkov, Ukraine
[4] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA
来源：
CARBON | 2006年 / 44卷 / 07期
基金：
美国国家科学基金会;
关键词：
carbon nanotubes; Raman spectroscopy; scanning electron microscopy; photons; biocompatibility;
D O I：
10.1016/j.carbon.2005.08.008
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：
Raman spectra of SWNTs suspended in aqueous solutions containing fragmented single-stranded DNA (SWNT:DNA), and films obtained from this suspension have been obtained. SEM study of the dried films indicated that the nanotubes tend to aggregate into bundles which results in the enhancement of the Raman intensity of the G(-) tangential band, and an upshift and broadening of the G(+) band. The intensity of radial breathing modes of metallic SWNTs is higher in the SWNT:DNA films as compared to that of the SWNT:DNA solution. The Raman spectra of SWNT:PVP and SWNT:agaroza samples exhibit similar changes as the SWNT:DNA samples when films are cast from the corresponding solutions. Both films and the solution forms of SWNT:DNA yield luminescence spectra which indicates the presence of individual tubes or small bundles in the films. The luminescence bands of SWNT:DNA films are relatively wider and is attributed to the interaction of DNA with the nanotube surface in the solid state. (c) 2005 Published by Elsevier Ltd.
引用
收藏
页码：1292 / 1297
页数：6
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