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Process Dependence of Orientation of Ribbon-Like Aromatic Molecules in Glassy Carbon

  • H. Maleki (a1), D. Ila (a1), L. R. Holland (a1), R. L. Zimmerman (a1) and G. M. Jenkins (a1)...

Abstract

Flat glassy polymeric carbon samples were prepared from phenolic resin by three techniques: spray coating, spin coating and molding. Cured at 110°C-180°C and pyrolyzed in argon at 600°C or at 1000°C, samples then were studied by RBS for trace impurities, by ESCA for surface oxidation and contamination and by Raman microprobe of the top surface and perpendicular to that for preferred orientation of aromatic ribbons. An increase of 13% to 24% in the relative area under the corresponding Raman peaks indicates increased orientation of the ribbon-like aromatic molecules in the sprayed and spin coated samples as compared with the molded sample.

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