Visualization of single-wall carbon nanotube (SWNT) networks in conductive polystyrene nanocomposites by charge contrast imaging

Joachim Loos, Alexander Alexeev, Nadia Grossiord, Cor E. Koning, Oren Regev

Research output: Contribution to journalArticle

134 Citations (Scopus)

Abstract

The morphology of conductive nanocomposites consisting of low concentration of single-wall carbon nanotubes (SWNT) and polystyrene (PS) has been studied using atomic force microscopy (AFM), transmission electron microscopy (TEM) and, in particular, scanning electron microscopy (SEM). Application of charge contrast imaging in SEM allows visualization of the overall SWNT dispersion within the polymer matrix as well as the identification of individual or bundled SWNTs at high resolution. The contrast mechanism involved will be discussed. In conductive nanocomposites the SWNTs are homogeneously dispersed within the polymer matrix and form a network. Beside fairly straight SWNTs, strongly bended SWNTs have been observed. However, for samples with SWNT concentrations below the percolation threshold, the common overall charging behavior of an insulating material is observed preventing the detailed morphological investigation of the sample.

Original languageEnglish
Pages (from-to)160-167
Number of pages8
JournalUltramicroscopy
Volume104
Issue number2
DOIs
Publication statusPublished - Sep 2005
Externally publishedYes

Fingerprint

Carbon Nanotubes
Polystyrenes
Carbon nanotubes
polystyrene
Nanocomposites
nanocomposites
Visualization
carbon nanotubes
Polymer matrix
Imaging techniques
Scanning electron microscopy
scanning electron microscopy
Insulating materials
polymers
matrices
insulation
charging
low concentrations
Atomic force microscopy
atomic force microscopy

Keywords

  • Charge contrast imaging
  • Conductive nanocomposites
  • Scanning electron microscopy (SEM)
  • Single-wall carbon nanotubes

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation

Cite this

Visualization of single-wall carbon nanotube (SWNT) networks in conductive polystyrene nanocomposites by charge contrast imaging. / Loos, Joachim; Alexeev, Alexander; Grossiord, Nadia; Koning, Cor E.; Regev, Oren.

In: Ultramicroscopy, Vol. 104, No. 2, 09.2005, p. 160-167.

Research output: Contribution to journalArticle

Loos, Joachim ; Alexeev, Alexander ; Grossiord, Nadia ; Koning, Cor E. ; Regev, Oren. / Visualization of single-wall carbon nanotube (SWNT) networks in conductive polystyrene nanocomposites by charge contrast imaging. In: Ultramicroscopy. 2005 ; Vol. 104, No. 2. pp. 160-167.
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