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Metal Atom Reactions with Polymer Films

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The chemical nature of the interface formed when an electropositive metal (chromium) is evaporated on the surface of oxygen-containing polymers has been investigated by synchrotron-radiation excited photoemission spectroscopy and by near-edge X-ray absorption fine stnrcture spectroscopy (NEXAFS). PMDA-ODA polyimide was studied along with two polymers intended to more simply model the complex chemical functionality of polyimide. Core-level spectra were resolved into distinct peaks, which were assigned to specific atoms in the polymer units, and changes in the spectra were monitored as chromium metal atoms were evaporated onto the surface. Similarly, NEXAFS spectra were taken as a function of chromium deposition. Results of these experiments show that chromium initially reacts very rapidly with surface carbonyl groups, but less strongly with ether oxygens or arene rings. In all polymers studied, formation of an electron-rich, carbide-like species was observed.

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Kovac, C.A., Jordan, J.L. & Pollak, R.A. Metal Atom Reactions with Polymer Films. MRS Online Proceedings Library 72, 247–252 (1986). https://doi.org/10.1557/PROC-72-247

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  • DOI: https://doi.org/10.1557/PROC-72-247

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