http://www.cnr.it/ontology/cnr/individuo/prodotto/ID194448
Competing Pathways in N-Allylurea Adsorption on Si(111)-(7 x 7) (Articolo in rivista)
- Type
- Label
- Competing Pathways in N-Allylurea Adsorption on Si(111)-(7 x 7) (Articolo in rivista) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1021/jp2103726 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- De Renzi V; Arnaud GF; del Pennino U (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1. Univ Modena & Reggio Emilia, Dipartimento Fis, I-41125 Modena, Italy
2. CNR Inst Nanosci, Ctr S3, I-41125 Modena, Italy (literal)
- Titolo
- Competing Pathways in N-Allylurea Adsorption on Si(111)-(7 x 7) (literal)
- Abstract
- Functionalization of silicon surfaces with N-allylurea (CH2=CH-CNH-CO-NH2) represents a valuable strategy to obtain covalently bonded Si-C interfaces with amino and/or carbonyl termination. In this work, we studied N-allylurea adsorption on the Si(111)-(7× 7) surface by combining X-ray and ultraviolet photoemission spectroscopy (XPS and UPS) with high resolution energy loss spectroscopy (HREELS) measurements. XPS core level analysis provides information on the molecular attachment process. Si-C covalent bonding is evidenced by the presence of a C Is component at 284.8 eV, while interaction through N-Si bonding is proved by the presence of a N 1s component at 397.8 eV. Three different adsorption mechanisms are envisaged: (I) [2 + 2]-like cycloaddition occurring at the rest atom-adatom dimer through cleavage of the vinyl group, (II) Si-N bonding at adatom sites upon cleavage of NH2 and rearrangement of the ureic group to form an imidol species (-N=C-OH), with release of a H atom, and (III) hydrosilylation at adatom sites, through cleavage of the vinyl group and involvement of H atoms provided by reaction II. (literal)
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- Autore CNR
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