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Electron microscopical study of pyro-carbon microneedles grown by high field pyrolysis

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Abstract

Investigations with transmission electron microscopy and selected area electron diffraction demonstrated that high field polymerization products grown at room temperature with benzonitrile are of needle shape and have an amorphous structure. High field pyrolyzation products which originated at high temperatures (1200° C) display a morphologically similar, but mechanically more stable composition as well as a larger number of needles per unit area. Their structure corresponds to an arrangement of layers of graphitelike regions concentric to the needle axis.

According to the evaluation of the electron diffraction diagrams obtained, it was possible to image directly in the electron microscope the curved lattice planes of the high field pyrolyzation products, in close agreement with the net plane distance of the 001 lattice planes of graphite (3.35 Å).

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Authors and Affiliations

  1. Inst. f. Phys. Chemie, Universität, D-5300, Bonn, Fed. Rep. Germany

    B. Ajeian, H. D. Beckey, A. Maas & U. Nitschke

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  1. B. Ajeian
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  2. H. D. Beckey
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  3. A. Maas
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  4. U. Nitschke
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Ajeian, B., Beckey, H.D., Maas, A. et al. Electron microscopical study of pyro-carbon microneedles grown by high field pyrolysis. Appl. Phys. 6, 111–118 (1975). https://doi.org/10.1007/BF00883557

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  • DOI: https://doi.org/10.1007/BF00883557

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