Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Flexure-induced structural and electronic changes in polymer supported membranes of length purified single-wall carbon nanotubes

Published

Author(s)

John M. Harris, Ganjigunte R. Iyer, Daneesh O. Simien, Jeffrey Fagan, JiYeon Huh, Jun Y. Chung, Steven Hudson, Jan Obrzut, Jack F. Douglas, Christopher Stafford, Erik K. Hobbie

Abstract

Thin membranes of length purified single-wall carbon nanotubes (SWCNTs) are uniaxially compressed by depositing them on prestretched polymer substrates. Upon release of the strain, the topography, microstructure and conductivity of the films are characterized using a combination of optical/fluorescence microscopy, light scattering, force microscopy, electron microscopy and impedance spectroscopy. Above a critical surface mass density, films assembled from nanotubes of well-defined length (100 nm to 1000 nm) exhibit a strongly nonlinear mechanical response. The measured strain dependence suggests that the films are softening through an alignment of the SWCNTs normal to the direction of prestrain, which at small strains is also apparent as an anisotropic increase in sheet resistance along the same direction. At higher strains the film conductivities increase, which we attribute to a compression-induced restoration of conductive pathways.
Citation
Journal of Physical Chemistry C
Volume
115
Issue
10

Keywords

nanotubes, flexible, electronics, polymers, wrinkling, modulus, conductivity, thin films

Citation

Harris, J. , Iyer, G. , Simien, D. , Fagan, J. , Huh, J. , Chung, J. , Hudson, S. , Obrzut, J. , Douglas, J. , Stafford, C. and Hobbie, E. (2011), Flexure-induced structural and electronic changes in polymer supported membranes of length purified single-wall carbon nanotubes, Journal of Physical Chemistry C, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=907546 (Accessed April 16, 2024)
Created February 21, 2011, Updated October 14, 2021