π-π interaction enhancement on the ultrafast third-order optical nonlinearity of carbon nanotubes/polymer composites

被引：31

作者：

Wang, ZW

Liu, CL

Liu, ZG

Xiang, H

Li, Z

Gong, QH ^{[1
]}

机构：

[1] Peking Univ, Dept Phys, Beijing 100871, Peoples R China

[2] Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2005年 / 407卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/j.cplett.2005.03.038

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：

Multi-walled carbon nanotubes (MWNTs) have been noncovalently modified with poly [2-methoxy, 5-(2'-ethyl-hexyloxy)-p-phenylene vinylene] (MEH-PPV) and poly [vinyl pyrrolidone] (PVP) to form two soluble MWNTs/polymer supramolecular composites. For the composite MWNTs/MEH-PPV, there is pi-pi interaction between the MEH-PPV and MWNTs besides wrapping of the polymer. The ultrafast third-order optical nonlinearities of the two composites were measured by using femtosecond time-resolved optical Kerr technique at the wavelength of 820 nm. MWNTs/MEH-PPV exhibits much larger ultrafast third-order optical nonlinearity than MWNTs/PVP. This enhancement is ascribed to the strong intermolecular nonlinearity induced by the pi-pi interaction between the polymer MEH-PPV and the sidewall of carbon nanotubes. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：35 / 39

页数：5

共 28 条

[1]

Ago H, 1999, ADV MATER, V11, P1281, DOI 10.1002/(SICI)1521-4095(199910)11:15<1281::AID-ADMA1281>3.0.CO

[2]

2-6

[3] Electronic interaction between photoexcited poly(p-phenylene vinylene) and carbon nanotubes [J].