Modeling the auxetic transition for carbon nanotube sheets

被引：44

作者：

Coluci, V. R. ^{[1
,2
]}

Hall, L. J. ^{[3
]}

Kozlov, M. E. ^{[3
]}

Zhang, M. ^{[3
]}

Dantas, S. O. ^{[4
]}

Galvao, D. S. ^{[2
]}

Baughman, R. H. ^{[3
]}

机构：

[1] Univ Estadual Campinas, Ctr High Educ Technol, BR-13484332 Limeira, SP, Brazil

[2] Univ Estadual Campinas, Inst Phys, Dept Appl Phys, BR-13083970 Campinas, SP, Brazil

[3] Univ Texas Dallas, Alan G MacDiarmid NanoTech Inst, Richardson, TX 75083 USA

[4] Univ Fed Juiz de Fora, Dept Fis, BR-36036330 Juiz De Fora, MG, Brazil

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 11期

基金：

美国国家科学基金会; 巴西圣保罗研究基金会;

关键词：

D O I：

10.1103/PhysRevB.78.115408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A simple model is developed to predict the complex mechanical properties of carbon nanotube sheets (buckypaper) [L. J. Hall et al., Science 320, 504 (2008)]. Fabricated using a similar method to that deployed for making writing paper, these buckypapers can have in-plane Poisson's ratios changed from positive to negative, becoming auxetic, as multiwalled carbon nanotubes are increasingly mixed with single-walled carbon nanotubes. Essential structural features of the buckypapers are incorporated into the model: isotropic in-plane mechanical properties, nanotubes preferentially oriented in the sheet plane, and freedom to undergo stress-induced elongation by both angle and length changes. The expressions derived for the Poisson's ratios enabled quantitative prediction of both observed properties and remarkable new properties obtainable by structural modification.

引用

页数：10

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