Diameter-dependent bending dynamics of single-walled carbon nanotubes in liquids

被引：121

作者：

Fakhri, Nikta ^{[1
,4
]}

Tsyboulski, Dmitri A. ^{[2
,5
]}

Cognet, Laurent ^{[2
,6
,7
]}

Weisman, R. Bruce ^{[2
,3
,5
]}

Pasquali, Matteo ^{[1
,2
,3
,4
,5
]}

机构：

[1] Rice Univ, Dept Chem & Biomol Engn, Houston, TX 77005 USA

[2] Rice Univ, Dept Chem, Houston, TX 77005 USA

[3] Rice Univ, NanoCarbon Ctr, Houston, TX 77005 USA

[4] Rice Univ, Ctr Biol & Environm Nanotechnol, Houston, TX 77005 USA

[5] Rice Univ, RE Smalley Inst Nanoscale Sci & Technol, Houston, TX 77005 USA

[6] Univ Bordeaux, Ctr Phys Mol Opt & Hertzienne, F-33405 Talence, France

[7] CNRS, F-33405 Talence, France

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2009年 / 106卷 / 34期

基金：

美国国家科学基金会;

关键词：

actin; microrheology; semiflexible filaments and polymers; stochastic dynamics; nanomechanics; PERSISTENCE LENGTH; MICROTUBULES; RODS;

D O I：

10.1073/pnas.0904148106

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

By relating nanotechnology to soft condensed matter, understanding the mechanics and dynamics of single-walled carbon nanotubes (SWCNTs) in fluids is crucial for both fundamental and applied science. Here, we study the Brownian bending dynamics of individual chirality-assigned SWCNTs in water by fluorescence microscopy. The bending stiffness scales as the cube of the nanotube diameter and the shape relaxation times agree with the semiflexible chain model. This suggests that SWCNTs may be the archetypal semiflexible filaments, highly suited to act as nanoprobes in complex fluids or biological systems.

引用

页码：14219 / 14223

页数：5

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