Synthesis of single layer graphene on Cu(111) by C60 supersonic molecular beam epitaxy

Emanuele Cavaliere, Roberta Tatti, Lucrezia Aversa, Roberto Verucchi, Giovanni Garberoglio, Nicola M. Pugno, Giorgio Speranza, Simone Taioli

Risultato della ricerca: Contributo in rivistaArticolo in rivista

17 Citazioni (Scopus)

Abstract

High kinetic energy impacts between inorganic surfaces and molecular beams seeded by organics represent a fundamental tool in materials science, particularly when they activate chemical-physical processes leading to nanocrystals' growth. Here we demonstrate single-layer graphene synthesis on copper by C60 supersonic molecular beam (SuMBE) epitaxy. A growth temperature down to 645°C, lower than that typical of chemical vapour deposition (1000°C), is achieved by thermal decomposition of C60 with the possibility of further reduction. Using a variety of electron spectroscopy and microscopy techniques, and first-principles simulations, we describe the chemical-physical mechanisms activated by SuMBE and assisted by thermal processes, resulting in graphene growth. In particular, we find a role of high kinetic energy deposition in enhancing the organic/inorganic interface interaction and controlling the fullerene cage openings. These results, while discussed in the specific case of graphene on copper, are potentially extendible to different metallic or semiconductor substrates and where lower processing temperature is desirable.
Lingua originaleEnglish
pagine (da-a)37982-37993
Numero di pagine12
RivistaRSC Advances
Volume6
DOI
Stato di pubblicazionePubblicato - 2016

Keywords

  • SumBE epitaxy graphene

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