Imaging polymer systems with high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM)

J. Loos, E. Sourty, K. Lu, G. With, de, S.S. Bavel, van

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Abstract

We have analyzed the nanoscale organization of various polymer systems by utilizing high-angle annular dark ?eld scanning transmission electron microscopy (HAADF STEM). All systems under investigation are purely carbon based; in some cases staining was used for comparison with conventional transmission electron microscopy (CTEM) imaging. For contrast creation we have applied density differences rather than differences in elemental composition of the materials. Because HAADF STEM is an incoherent imaging technique, which provides images easy to interpret due to the lack of phase contrast, the high signal-to-noise ratio and the linearity of the signal intensity, imaging artifacts are substantially reduced and additional information on the nanoscale organization of polymer materials is obtained that is not accessible by CTEM. Exemplary, we present HAADF STEM results form four different polymer systemssa rubber blend, a carbon black ?lled conductive nanocomposite, a functional blend as applied for the photoactive layer of a polymer solar cell, and semicrystalline polyethylenesand discuss critically contrast origin and the advantages of HAADF STEM imaging for morphology characterization of polymer systems. © 2009 American Chemical Society.
Original languageEnglish
Pages (from-to)2581-2586
JournalMacromolecules
Volume42
Issue number7
DOIs
Publication statusPublished - 2009

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Polymers
Transmission electron microscopy
Imaging techniques
Scanning electron microscopy
Soot
Rubber
Carbon black
Signal to noise ratio
Nanocomposites
Carbon
Chemical analysis

Cite this

Loos, J. ; Sourty, E. ; Lu, K. ; With, de, G. ; Bavel, van, S.S. / Imaging polymer systems with high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM). In: Macromolecules. 2009 ; Vol. 42, No. 7. pp. 2581-2586.
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abstract = "We have analyzed the nanoscale organization of various polymer systems by utilizing high-angle annular dark ?eld scanning transmission electron microscopy (HAADF STEM). All systems under investigation are purely carbon based; in some cases staining was used for comparison with conventional transmission electron microscopy (CTEM) imaging. For contrast creation we have applied density differences rather than differences in elemental composition of the materials. Because HAADF STEM is an incoherent imaging technique, which provides images easy to interpret due to the lack of phase contrast, the high signal-to-noise ratio and the linearity of the signal intensity, imaging artifacts are substantially reduced and additional information on the nanoscale organization of polymer materials is obtained that is not accessible by CTEM. Exemplary, we present HAADF STEM results form four different polymer systemssa rubber blend, a carbon black ?lled conductive nanocomposite, a functional blend as applied for the photoactive layer of a polymer solar cell, and semicrystalline polyethylenesand discuss critically contrast origin and the advantages of HAADF STEM imaging for morphology characterization of polymer systems. {\circledC} 2009 American Chemical Society.",
author = "J. Loos and E. Sourty and K. Lu and {With, de}, G. and {Bavel, van}, S.S.",
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Imaging polymer systems with high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM). / Loos, J.; Sourty, E.; Lu, K.; With, de, G.; Bavel, van, S.S.

In: Macromolecules, Vol. 42, No. 7, 2009, p. 2581-2586.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Loos, J.

AU - Sourty, E.

AU - Lu, K.

AU - With, de, G.

AU - Bavel, van, S.S.

PY - 2009

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AB - We have analyzed the nanoscale organization of various polymer systems by utilizing high-angle annular dark ?eld scanning transmission electron microscopy (HAADF STEM). All systems under investigation are purely carbon based; in some cases staining was used for comparison with conventional transmission electron microscopy (CTEM) imaging. For contrast creation we have applied density differences rather than differences in elemental composition of the materials. Because HAADF STEM is an incoherent imaging technique, which provides images easy to interpret due to the lack of phase contrast, the high signal-to-noise ratio and the linearity of the signal intensity, imaging artifacts are substantially reduced and additional information on the nanoscale organization of polymer materials is obtained that is not accessible by CTEM. Exemplary, we present HAADF STEM results form four different polymer systemssa rubber blend, a carbon black ?lled conductive nanocomposite, a functional blend as applied for the photoactive layer of a polymer solar cell, and semicrystalline polyethylenesand discuss critically contrast origin and the advantages of HAADF STEM imaging for morphology characterization of polymer systems. © 2009 American Chemical Society.

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