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Your search keyword '"Cattelan M"' showing total 6 results
Start Over Author "Cattelan M" Publisher royal society of chemistry
6 results on '"Cattelan M"'

1. Synthesis of graphene nanoribbons with a defined mixed edge-site sequence by surface assisted polymerization of (1,6)-dibromopyrene on Ag(110)

Author

Smerieri, M, Píš, I, Ferrighi, L, Nappini, S, Lusuan, A, DI VALENTIN, C, Vaghi, L, Papagni, A, Cattelan, M, Agnoli, S, Magnano, E, Bondino, F, Savio, L, FERRIGHI, LARA, DI VALENTIN, CRISTIANA, VAGHI, LUCA, PAPAGNI, ANTONIO, Savio, L., Smerieri, M, Píš, I, Ferrighi, L, Nappini, S, Lusuan, A, DI VALENTIN, C, Vaghi, L, Papagni, A, Cattelan, M, Agnoli, S, Magnano, E, Bondino, F, Savio, L, FERRIGHI, LARA, DI VALENTIN, CRISTIANA, VAGHI, LUCA, PAPAGNI, ANTONIO, and Savio, L.

Abstract

By a combination of scanning tunneling microscopy, X-ray spectroscopic techniques and density functional theory calculations, we prove the formation of extended patterns of parallel, graphene nanoribbons with alternate zig-zag and armchair edges and selected width by surface-assisted Ullmann coupling polymerization and dehydrogenation of 1,6-dibromopyrene (C16H8Br2). Besides the relevance of these nanostructures for their possible application in nanodevices, we demonstrate the peculiarity of halogenated pyrene derivatives for the formation of nanoribbons, in particular on Ag(110). These results open the possibility of tuning the shape and dimension of nanoribbons (and hence the correlated electronic properties) by choosing suitably tailored or on-purpose designed molecular precursors.

Published
2016

2. On-surface photo-dissociation of C-Br bonds: Towards room temperature Ullmann coupling

Author

Basagni, A, Ferrighi, L, Cattelan, M, Nicolas, L, Handrup, K, Vaghi, L, Papagni, A, Sedona, F, DI VALENTIN, C, Agnoli, S, Sambi, M, FERRIGHI, LARA, VAGHI, LUCA, PAPAGNI, ANTONIO, DI VALENTIN, CRISTIANA, Sambi, M., Basagni, A, Ferrighi, L, Cattelan, M, Nicolas, L, Handrup, K, Vaghi, L, Papagni, A, Sedona, F, DI VALENTIN, C, Agnoli, S, Sambi, M, FERRIGHI, LARA, VAGHI, LUCA, PAPAGNI, ANTONIO, DI VALENTIN, CRISTIANA, and Sambi, M.

Abstract

The surface-assisted synthesis of gold-organometallic hybrids on the Au(111) surface both by thermo- and light-initiated dehalogenation of bromo-substituted tetracene is reported. Combined X-ray photoemission (XPS) and scanning tunneling microscopy (STM) data reveal a significant increase of the surface order when mild reaction conditions are combined with 405 nm light irradiation.

Published
2015

3. Multiple doping of graphene oxide foams and quantum dots: new switchable systems for oxygen reduction and water remediation.

Author

Favaro, M., Carraro, F., Cattelan, M., Colazzo, L., Durante, C., Sambi, M., Gennaro, A., Agnoli, S., and Granozzi, G.

Abstract

Single- and multi-boron, nitrogen, sulphur doped graphene oxide quantum dots and three-dimensional foams are synthesized by a simple and environmentally friendly electrochemical method. The electrochemical activity of these materials in the oxygen reduction reaction is investigated by cyclic voltammetry and rotating disk electrode measurements. The experimental data demonstrate that the reaction selectivity is controlled by the oxidation degree of the materials: as-prepared graphene oxide quantum dots, which present highly oxidized functional groups, follow a two-electron reduction pathway and produce hydrogen peroxide, whereas after a reduction treatment by NaBH4, the same materials favour a four-electron reduction of oxygen to water. The high selectivity and high efficiency of the graphene oxide quantum dots for the production of hydrogen peroxide can be efficiently used for water remediation applications (phenol decomposition). [ABSTRACT FROM AUTHOR]

Published
2015
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5. The magnetization orientation of Fe ultrathin layers in contact with graphene.

Author

Cattelan M, Píš I, Nappini S, Magnano E, Bondino F, and Agnoli S

Abstract

In this paper, we study the magnetic and chemical properties of Fe/graphene vertically stacked ultrathin films by means of X-ray magnetic circular dichroism and X-ray photoelectron spectroscopy. We compare two systems: an iron layer deposited directly on top of the Pt(111) surface, and an intercalated Fe film sandwiched between graphene and Pt(111). The system composed of a submonolayer Fe deposited directly on Pt(111) maintains an out-of-plane easy magnetization axis, even if it has been covered by graphene that quenches effectively the magnetic orbital moment of Fe. However, when the Fe coverage is increased above 1 ML the easy magnetization axis flips in the in-plane direction.

Published
2016
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6. On-surface photo-dissociation of C-Br bonds: towards room temperature Ullmann coupling.

Author

Basagni A, Ferrighi L, Cattelan M, Nicolas L, Handrup K, Vaghi L, Papagni A, Sedona F, Valentin CD, Agnoli S, and Sambi M

Abstract

The surface-assisted synthesis of gold-organometallic hybrids on the Au(111) surface both by thermo- and light-initiated dehalogenation of bromo-substituted tetracene is reported. Combined X-ray photoemission (XPS) and scanning tunneling microscopy (STM) data reveal a significant increase of the surface order when mild reaction conditions are combined with 405 nm light irradiation.

Published
2015
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