A Raman spectroscopic study of the polyimide/Ag(110) interface |
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| Affiliation: | 1. Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping, 136000, Jilin, China;2. Department of Tourism and Geography, Jilin Normal University, Siping, 136000, Jilin, China;3. College of Information & Technology, Jilin Normal University, Siping, 136000, Jilin, China;1. National Institute of Materials Physics, P.O. Box MG-7, 077125 Magurele, Romania;2. National Institute for R & D in Microtechnologies (IMT), Erou Iancu Nicolae Str. 126A, 077190 Bucharest, Romania;1. Department of Physics, Tripura University, Suryamaninagar, 799022, Tripura, India;2. Department of Physics, D. D. M. College, Khowai, 799202, Tripura, India;3. Department of Physics, Women’s College, Agartala, 799001, Tripura, India;1. School of Electrical, Electronic and Computer Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;2. Department of Mechanical Engineering, University of Melbourne, VIC 3010, Australia;1. Institute of Chemistry, Far Eastern Branch of RAS, 159, prosp.100-letiya Vladivostoka, Vladivostok, 690022, Russia;2. Institute of Automation and Control Processes, Far Eastern Branch of RAS, 5, Radio Str., Vladivostok, 690041, Russia;3. Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, RAS, 16/10, Miklukho-Maklaya Str., Moscow, 117997, Russia;4. CIC nanoGUNE, Donostia - San Sebastian, 20018, Spain;5. I. Ya. Postovsky Institute of Organic Synthesis, Ural Branch of RAS, 20, S. Kovalevskoy Str., Yekaterinburg, 620990, Russia |
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| Abstract: | We have investigated the bonding of the monomers pyromellitic dianhydride (PMDA) and oxydianiline (ODA) and their subsequent polymerization to form polyimide on Ag(110) in ultrahigh vacuum. Unenhanced surface Raman spectroscopy was used to identify adsorbed species and to follow the polymerization reaction. ODA was unreactive on the cold (140 K) surface; spectral features were identical to those in the condensed multilayer indicating that the monolayer is physisorbed. PMDA, on the other hand, adsorbed dissociatively, the evidence being consistent with a bidentate surface carboxylate mode of bonding. Finally, heating a 30 Å film of codosed monomers to 473 K resulted in the formation of a polyimide film as shown by characteristic features in the carbonyl stretching region of the Raman spectrum. |
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