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 2p3/2 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 pi-conjugated chain carbons mainly, while a weak interaction with the aromatic carbons of the phenyl group occurs at initial Cr coverages (0.5-3 angstrom). The growth-mode of Cr on PPA seems to proceed at first by metal monolayer deposition followed by cluster formation.
Cr Metallization of Polyphenylacetylene Thin-film Investigated By Xps / G., Polzonetti; Russo, Maria Vittoria; A., Furlani; G., Infante. - In: CHEMICAL PHYSICS LETTERS. - ISSN 0009-2614. - 214:(1993), pp. 333-337. [10.1016/0009-2614(93)85645-5]
Cr Metallization of Polyphenylacetylene Thin-film Investigated By Xps
RUSSO, Maria Vittoria;
1993
Abstract
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 2p3/2 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 pi-conjugated chain carbons mainly, while a weak interaction with the aromatic carbons of the phenyl group occurs at initial Cr coverages (0.5-3 angstrom). The growth-mode of Cr on PPA seems to proceed at first by metal monolayer deposition followed by cluster formation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
