Surface chemistry of two-dimensional graphene crystal and surface catalysis research View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2008-2011

FUNDING AMOUNT

380000 CNY

ABSTRACT

The present project has focused on three aspects: the controllable epitaxial growth of graphene, intercalation of elements at the graphene/substrate interfaces, and the surface chemistry underneath the graphene cover. First, various spectroscopic and microscopic techniques, including STM, PEEM, LEEM, XPS, and UPS, were applied to study the epitaxial growth of graphene on metals and SiC surfaces. It has been found that the smallest nanographene (C13) forms on Ru(0001) surface via the substrate induced surface clustering effect. Using the C13 clusters as the building block, monolayer graphene islands with the lateral size from nanometer to millimeter can be prepared. Furthermore, the thickness of the graphene structure can be controlled by the epitaxial growth process, producing monolayer, bilayer, and trilayer graphene. Second, the intercalation of O, Si, and Pb at the graphene/metal interfaces were observed. Two kinds of intercalation mechanism have been proposed, including the intercalation via penetration through the graphene layer and the intercalation through the open edges of graphene islands.The intercalated atoms decouple the graphene from the substrate, making the top graphene layer free-standing. Finally, the 2D nanospace between the top graphene layer and the substrate surface presents a unique confine More... »

URL

http://npd.nsfc.gov.cn/projectDetail.action?pid=20873143

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