Cr metallization of polyphenylacetylene thin film investigated by XPS

✍ Scribed by G. Polzonetti; M.V. Russo; A. Furlani; G. Infante

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 398 KB
• Volume: 214
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)85645-5

✦ Synopsis

The early stages of Cr/polyphenylacetylene (PPA) interface formation have been investigated by means of X-ray photoemission spectroscopy (XPS). The core level C 1s and Cr 2p,,, spectra of the substrate and of the metal respectively, recorded at a constant metal evaporation rate, suggest the formation of a charge-transfer complex involving the n-conjugated chain carbons mainly, while a weak interaction with the aromatic carbons of the phenyl group occurs at initial Cr coverages (0.5-3 A). The growth-mode of Cr on PPA seems to proceed at first by metal monolayer deposition followed by cluster formation.